Poor MPG D15B7
#1
Poor MPG D15B7 [solved]
Hello,
I`m driving a 94` EJ2 Coupe (DX) in Europe and MPG sucks.
I found no answers in other threads, like:
https://honda-tech.com/forums/honda-...leage-1035028/
What I know so far:
Driving like grampa.
Stock engine. 240k Km
No cel code. (cel is working)
Stock ECU P06.
Timing belt is new + set on 16 degrees BTDC.
New spark plugs.
New fuel filter.
New air filter.
New o2 sensor.
TPS sensor is working ok 0.5V - 4.5V at full open.
Valves are adjusted, cleaned, all good here.
Good tire preasure.
Fuel is good quality.
No leakings.
Engine olil level is ok.
Engine temperature is ok.
Custom final exhaust.
On deceleration my exhaust backfire quite a lot, Is this normal cuz I have a custom exhaust?
Car is running just fine, no issues, starts up ok, normal engine performance.
30 MPG outside the city is kind of crap for me, any suggestions?
Thank you!
I`m driving a 94` EJ2 Coupe (DX) in Europe and MPG sucks.
I found no answers in other threads, like:
https://honda-tech.com/forums/honda-...leage-1035028/
What I know so far:
Driving like grampa.
Stock engine. 240k Km
No cel code. (cel is working)
Stock ECU P06.
Timing belt is new + set on 16 degrees BTDC.
New spark plugs.
New fuel filter.
New air filter.
New o2 sensor.
TPS sensor is working ok 0.5V - 4.5V at full open.
Valves are adjusted, cleaned, all good here.
Good tire preasure.
Fuel is good quality.
No leakings.
Engine olil level is ok.
Engine temperature is ok.
Custom final exhaust.
On deceleration my exhaust backfire quite a lot, Is this normal cuz I have a custom exhaust?
Car is running just fine, no issues, starts up ok, normal engine performance.
30 MPG outside the city is kind of crap for me, any suggestions?
Thank you!
Last edited by Marc87_RO; 06-01-2017 at 11:30 PM.
#2
Re: Poor MPG D15B7
It's winter, fuel economy always goes down during winter.
Also, is your car an automatic or a manual transmission?
Also, is your car an automatic or a manual transmission?
#3
#6
Re: Poor MPG D15B7
I would suggest doing a compression test. If the motor is tired it won't be as fuel efficient. Also, it is very probable that you have high amounts of ethanol in your gas. This lowers MPG. Pure gasoline gets way higher gas mileage than gas/ethanol mix.
Please study the table below as it is 3 years of monitoring two D15B7 motors in my manual CDM CX (USDM DX) hatchback:
As you can seem, every winter (November - March/April) my fuel economy went down.
You will also notice, once in a blue moon my MPG spiked to near 40 MPG. I believe those were rare times I lucked out and got pure gas with no ethanol in it.
My average because of those high spikes was 33 MPG after 3 years of monitoring.
Please study the table below as it is 3 years of monitoring two D15B7 motors in my manual CDM CX (USDM DX) hatchback:
MPG | Odometer | Liters | Distance Travelled | Date |
0.00 | 299521.1 | 37.130 | 0.0 | 2/17/2013 |
30.18 | 300025 | 39.270 | 503.9 | 2/24/2013 |
29.87 | 300489.4 | 36.570 | 464.4 | 3/1/2013 |
32.96 | 300985.75 | 35.420 | 496.3 | 3/7/2013 |
30.36 | 301470.06 | 37.530 | 484.3 | 3/14/2013 |
31.83 | 301967.44 | 36.760 | 497.4 | 3/21/2013 |
36.23 | 302517.34 | 35.700 | 549.9 | 3/24/2013 |
34.20 | 303026.22 | 35.000 | 508.9 | 3/29/2013 |
34.54 | 303598.88 | 39.000 | 572.7 | 4/3/2013 |
31.18 | 304129.28 | 40.010 | 530.4 | 4/17/2013 |
31.63 | 304667.16 | 40.000 | 537.9 | 4/25/2013 |
35.02 | 305210.9 | 36.520 | 543.8 | 4/29/2013 |
35.99 | 305807.63 | 39.000 | 596.7 | 5/5/2013 |
33.02 | 306341 | 38.000 | 533.4 | 5/12/2013 |
34.35 | 306874.1 | 36.510 | 533.1 | 5/21/2013 |
31.75 | 307346.8 | 35.020 | 472.7 | 5/26/2013 |
31.20 | 307797.8 | 34.000 | 451.0 | 5/31/2013 |
34.30 | 308322.72 | 36.000 | 524.9 | 6/5/2013 |
32.42 | 308860.4 | 39.010 | 537.7 | 6/10/2013 |
34.83 | 309482.3 | 42.000 | 621.9 | 6/15/2013 |
33.95 | 310002 | 36.010 | 519.7 | 6/20/2013 |
37.34 | 310377.6 | 23.660 | 375.6 | 6/23/2013 |
32.33 | 310886.2 | 37.010 | 508.6 | 6/28/2013 |
33.22 | 311408.7 | 37.000 | 522.5 | 7/3/2013 |
33.89 | 311956.28 | 38.010 | 547.6 | 7/9/2013 |
31.46 | 312417.7 | 34.500 | 461.4 | 7/13/2013 |
34.07 | 312895.8 | 33.010 | 478.1 | 7/16/2013 |
34.18 | 313477.2 | 40.010 | 581.4 | 7/18/2013 |
32.23 | 313956.8 | 35.010 | 479.6 | 7/21/2013 |
28.24 | 314345.6 | 32.380 | 388.8 | 7/26/2013 |
29.50 | 314690.88 | 27.530 | 345.3 | 7/31/2013 |
29.76 | 315178.63 | 38.550 | 487.8 | 8/6/2013 |
32.87 | 315716.7 | 38.510 | 538.1 | 8/11/2013 |
31.06 | 316185.5 | 35.510 | 468.8 | 8/17/2013 |
30.77 | 316625.1 | 33.610 | 439.6 | 8/23/2013 |
30.82 | 317087.9 | 35.320 | 462.8 | 8/29/2013 |
33.25 | 317626.8 | 38.130 | 538.9 | 9/9/2013 |
31.84 | 318151.2 | 38.740 | 524.4 | 9/15/2013 |
30.71 | 318636 | 37.130 | 484.8 | 9/19/2013 |
31.75 | 319082.63 | 33.090 | 446.6 | 9/23/2013 |
33.04 | 319616.6 | 38.020 | 534.0 | 9/28/2013 |
30.89 | 320114.8 | 37.940 | 498.2 | 10/2/2013 |
31.92 | 320588.8 | 34.930 | 474.0 | 10/8/2013 |
32.38 | 321086.5 | 36.160 | 497.7 | 10/12/2013 |
32.23 | 321552.63 | 34.020 | 466.1 | 10/14/2013 |
29.07 | 322031.8 | 38.770 | 479.2 | 10/19/2013 |
31.61 | 322476.3 | 33.080 | 444.5 | 10/23/2013 |
30.31 | 322952.1 | 36.920 | 475.8 | 10/27/2013 |
33.81 | 323469.34 | 35.990 | 517.3 | 11/1/2013 |
32.37 | 323966.06 | 36.100 | 496.7 | 11/6/2013 |
29.49 | 324417.34 | 36.000 | 451.3 | 11/10/2013 |
32.50 | 324938.75 | 37.740 | 521.4 | 11/15/2013 |
31.55 | 325424.34 | 36.210 | 485.6 | 11/21/2013 |
30.69 | 325899.25 | 36.400 | 474.9 | 12/4/2013 |
28.73 | 326373.94 | 38.870 | 474.7 | 12/8/2013 |
31.26 | 326828.3 | 34.190 | 454.4 | 12/14/2013 |
32.75 | 327273.84 | 32.000 | 445.5 | 12/28/2013 |
30.78 | 327745.34 | 36.030 | 471.5 | 1/3/2014 |
31.45 | 328244.34 | 37.320 | 499.0 | 1/8/2014 |
31.57 | 328739.94 | 36.930 | 495.6 | 1/15/2014 |
31.00 | 329235.16 | 37.580 | 495.2 | 1/21/2014 |
30.21 | 329646.16 | 32.000 | 411.0 | 1/26/2014 |
31.55 | 330119.3 | 35.280 | 473.2 | 2/2/2014 |
30.57 | 330600.16 | 37.000 | 480.8 | 2/16/2014 |
34.59 | 331143.03 | 36.920 | 542.9 | 2/28/2014 |
31.62 | 331679.06 | 39.880 | 536.0 | 3/6/2014 |
34.50 | 332215.47 | 36.570 | 536.4 | 3/15/2014 |
33.43 | 332671.1 | 32.060 | 455.6 | 3/20/2014 |
32.16 | 333134.22 | 33.870 | 463.1 | 3/28/2014 |
32.98 | 333645.6 | 36.470 | 511.4 | 4/2/2014 |
33.21 | 334356.97 | 50.380 | 711.4 | 4/9/2014 |
32.95 | 334757.44 | 28.590 | 400.5 | 4/24/2014 |
33.81 | 335219.56 | 32.150 | 462.1 | 4/27/2014 |
33.27 | 335736.28 | 36.530 | 516.7 | 5/3/2014 |
37.12 | 336239.25 | 31.870 | 503.0 | 5/13/2014 |
33.74 | 336679.34 | 30.680 | 440.1 | 5/17/2014 |
35.03 | 337226.25 | 36.720 | 546.9 | 5/25/2014 |
33.60 | 337781.56 | 38.880 | 555.3 | 5/31/2014 |
34.79 | 338206.06 | 28.700 | 424.5 | 6/7/2014 |
35.46 | 338741.66 | 35.530 | 535.6 | 6/10/2014 |
34.37 | 339263.8 | 35.740 | 522.2 | 6/16/2014 |
35.48 | 339763.34 | 33.120 | 499.5 | 6/22/2014 |
33.21 | 340162.88 | 28.300 | 399.5 | 6/27/2014 |
34.47 | 340648.25 | 33.120 | 485.4 | 7/3/2014 |
33.95 | 341111.66 | 32.110 | 463.4 | 7/8/2014 |
36.65 | 341663.34 | 35.410 | 551.7 | 7/16/2014 |
34.07 | 342150.34 | 33.620 | 487.0 | 7/23/2014 |
35.81 | 342698.56 | 36.010 | 548.2 | 7/27/2014 |
38.58 | 343271.1 | 34.910 | 572.5 | 8/1/2014 |
37.04 | 343775.94 | 32.060 | 504.8 | 8/7/2014 |
33.98 | 344297.06 | 36.080 | 521.1 | 8/13/2014 |
37.16 | 344849.13 | 34.950 | 552.1 | 8/19/2014 |
36.50 | 345362.88 | 33.110 | 513.8 | 8/26/2014 |
37.38 | 345824.66 | 29.060 | 461.8 | 9/3/2014 |
35.77 | 346365.78 | 35.580 | 541.1 | 9/4/2014 |
36.49 | 346929.75 | 36.360 | 564.0 | 9/11/2014 |
37.56 | 347475.16 | 34.160 | 545.4 | 9/16/2014 |
32.41 | 347983.72 | 36.910 | 508.6 | 9/22/2014 |
35.89 | 348466.34 | 31.630 | 482.6 | 9/27/2014 |
36.67 | 348971.75 | 32.420 | 505.4 | 10/2/2014 |
33.51 | 349493.94 | 36.660 | 522.2 | 10/8/2014 |
36.48 | 349983.34 | 31.560 | 489.4 | 10/19/2014 |
33.17 | 350462.4 | 33.970 | 479.1 | 10/27/2014 |
31.40 | 350934.66 | 35.380 | 472.3 | 10/31/2014 |
35.86 | 351448.06 | 33.680 | 513.4 | 11/8/2014 |
33.77 | 351991.66 | 37.870 | 543.6 | 11/28/2014 |
35.14 | 352420.94 | 28.740 | 429.3 | 12/2/2014 |
31.38 | 352936.47 | 38.650 | 515.5 | 12/11/2014 |
33.71 | 353461.34 | 36.630 | 524.9 | 12/13/2014 |
32.28 | 353962.4 | 36.510 | 501.1 | 12/19/2014 |
36.59 | 354536.06 | 36.880 | 573.7 | 12/24/2014 |
31.44 | 355034.16 | 37.270 | 498.1 | 12/30/2014 |
33.39 | 355537.4 | 35.450 | 503.3 | 1/7/2015 |
33.44 | 356067.44 | 37.280 | 530.0 | 1/14/2015 |
34.66 | 356605.34 | 36.510 | 537.9 | 1/20/2015 |
31.40 | 357110.25 | 37.820 | 504.9 | 1/27/2015 |
32.46 | 357617.66 | 36.770 | 507.4 | 2/4/2015 |
31.94 | 358143.44 | 38.720 | 525.8 | 2/13/2015 |
33.44 | 358682.13 | 37.890 | 538.7 | 2/17/2015 |
33.42 | 359160.56 | 33.670 | 478.4 | 2/17/2015 |
30.99 | 359703.56 | 41.220 | 543.0 | 3/3/2015 |
32.30 | 360202.34 | 36.320 | 498.8 | 3/16/2015 |
32.97 | 360696.75 | 35.270 | 494.4 | 3/26/2015 |
35.95 | 361234.03 | 35.160 | 537.3 | 4/7/2015 |
37.37 | 362002.94 | 48.400 | 768.9 | 4/16/2015 |
33.25 | 362538.16 | 37.860 | 535.2 | 4/23/2015 |
32.52 | 363073.03 | 38.690 | 534.9 | 5/2/2015 |
34.21 | 363620.38 | 37.640 | 547.3 | 5/9/2015 |
35.19 | 364199.2 | 38.690 | 578.8 | 5/15/2015 |
34.19 | 364755.4 | 38.270 | 556.2 | 5/21/2015 |
34.66 | 365313.1 | 37.850 | 557.7 | 5/27/2015 |
34.91 | 365837.3 | 35.320 | 524.2 | 6/6/2015 |
36.06 | 366352.9 | 33.630 | 515.6 | 6/12/2015 |
33.06 | 366788.3 | 30.980 | 435.4 | 6/17/2015 |
37.09 | 367280 | 31.180 | 491.7 | 6/28/2015 |
31.44 | 367780.4 | 37.440 | 500.4 | 7/4/2015 |
36.62 | 368342.6 | 36.110 | 562.2 | 7/12/2015 |
37.20 | 368944.28 | 38.050 | 601.7 | 7/18/2015 |
35.19 | 369443.4 | 33.360 | 499.1 | 7/21/2015 |
36.53 | 370002.9 | 36.030 | 559.5 | 7/29/2015 |
34.98 | 370518.9 | 34.700 | 516.0 | 8/6/2015 |
37.22 | 371089 | 36.030 | 570.1 | 8/13/2015 |
34.42 | 371638.2 | 37.530 | 549.2 | 8/21/2015 |
32.68 | 372197.03 | 40.220 | 558.8 | 8/31/2015 |
33.07 | 372648.1 | 32.080 | 451.1 | 9/12/2015 |
36.24 | 373115.4 | 30.330 | 467.3 | 9/17/2015 |
34.00 | 373650.8 | 37.040 | 535.4 | 9/23/2015 |
34.50 | 376031.1 | 162.310 | 2380.3 | 10/22/2015 |
33.85 | 376590.4 | 38.870 | 559.3 | 10/29/2015 |
32.63 | 377118.78 | 38.090 | 528.4 | 11/8/2015 |
32.67 | 377665.1 | 39.330 | 546.3 | 11/17/2015 |
32.66 | 379549.2 | 135.710 | 1884.1 | 12/8/2015 |
32.71 | 380004.7 | 32.760 | 455.5 | 12/15/2015 |
31.52 | 380447.7 | 33.060 | 443.0 | 12/22/2015 |
34.22 | 380960.28 | 35.240 | 512.6 | 12/31/2015 |
28.11 | 381404.7 | 37.190 | 444.4 | 1/9/2016 |
31.55 | 381913 | 37.900 | 508.3 | 1/18/2016 |
34.09 | 382434.6 | 35.993 | 521.6 | 1/26/2016 |
29.52 | 382887.28 | 36.066 | 452.7 | 2/3/2016 |
31.86 | 383411.13 | 38.675 | 523.8 | 2/10/2016 |
31.12 | 383862.78 | 34.140 | 451.7 | 2/16/2016 |
30.95 | 384376.72 | 39.058 | 513.9 | 2/23/2016 |
34.06 | 384847.1 | 32.484 | 470.4 | 3/2/2016 |
34.82 | 385363.5 | 34.886 | 516.4 | 3/6/2016 |
30.29 | 385788.88 | 33.032 | 425.4 | 3/12/2016 |
31.93 | 386278.3 | 36.055 | 489.4 | 3/19/2016 |
35.63 | 386793.8 | 34.036 | 515.5 | 3/24/2016 |
36.78 | 387326 | 34.036 | 532.2 | 3/29/2016 |
34.27 | 387800 | 32.534 | 474.0 | 4/2/2016 |
35.79 | 388302.5 | 33.027 | 502.5 | 4/7/2016 |
31.59 | 388833.5 | 39.536 | 531.0 | 4/13/2016 |
40.45 | 389418.9 | 34.039 | 585.4 | 4/17/2016 |
30.16 | 389923.22 | 39.326 | 504.3 | 4/22/2016 |
41.87 | 390491.8 | 31.943 | 568.6 | 4/27/2016 |
36.26 | 390991.5 | 32.414 | 499.7 | 5/3/2016 |
35.54 | 391495.6 | 33.365 | 504.1 | 5/7/2016 |
36.56 | 392050.2 | 35.686 | 554.6 | 5/13/2016 |
37.02 | 392609.6 | 35.549 | 559.4 | 5/20/2016 |
33.31 | 393093.2 | 34.149 | 483.6 | 5/24/2016 |
33.27 | 393601.6 | 35.946 | 508.4 | 6/8/2016 |
35.48 | 394106.9 | 33.496 | 505.3 | 6/14/2016 |
35.94 | 394663.1 | 36.399 | 556.2 | 6/19/2016 |
36.09 | 395199.28 | 34.945 | 536.2 | 6/24/2016 |
37.48 | 395750.28 | 34.578 | 551.0 | 6/29/2016 |
37.40 | 396227.7 | 30.028 | 477.4 | 7/5/2016 |
36.38 | 396678.2 | 29.126 | 450.5 | 7/9/2016 |
35.98 | 397193.2 | 33.667 | 515.0 | 7/15/2016 |
35.35 | 397685.38 | 32.753 | 492.2 | 7/20/2016 |
35.22 | 398202.97 | 34.570 | 517.6 | 7/25/2016 |
34.78 | 398712.16 | 34.440 | 509.2 | 8/1/2016 |
30.32 | 399025.75 | 24.331 | 313.6 | 8/4/2016 |
0.00 | 200884 | 0.010 | 0.0 | 4/28/2016 |
33.18 | 201462.3 | 40.997 | 578.3 | 4/28/2016 |
33.82 | 202013.8 | 38.359 | 551.5 | 5/26/2016 |
31.41 | 202548.5 | 40.040 | 534.7 | 6/10/2016 |
32.57 | 203067.7 | 37.498 | 519.2 | 7/6/2016 |
As you can seem, every winter (November - March/April) my fuel economy went down.
You will also notice, once in a blue moon my MPG spiked to near 40 MPG. I believe those were rare times I lucked out and got pure gas with no ethanol in it.
My average because of those high spikes was 33 MPG after 3 years of monitoring.
Trending Topics
#8
Re: Poor MPG D15B7
No issues starting the engine, no poor performance, but I guess I will clean them anyway.
@mk378
Yes, I did the timping test in limp mode.
@TomCat39
I will try a compresion test and have the injectors cleaned.
Here in Europe we have 95 to 101 Octane fuel, I`m using 95, is good quality.
I will study your table, thank you!
@mk378
Yes, I did the timping test in limp mode.
@TomCat39
I will try a compresion test and have the injectors cleaned.
Here in Europe we have 95 to 101 Octane fuel, I`m using 95, is good quality.
I will study your table, thank you!
#9
Re: Poor MPG D15B7
When you decelerate (defined as TPS at 0% and engine rpm above idle speed), the EFI system is programmed to cut all fuel to the engine. The backfiring suggests that an injector is not closing all the way. You may see a difference in one of the spark plugs being black in the cylinder that is getting too much fuel.
#10
Re: Poor MPG D15B7
When you decelerate (defined as TPS at 0% and engine rpm above idle speed), the EFI system is programmed to cut all fuel to the engine. The backfiring suggests that an injector is not closing all the way. You may see a difference in one of the spark plugs being black in the cylinder that is getting too much fuel.
My motorcycle backfires as well, but is carbureted, so it is normal. 4 stroke Honda VFR 750.
@TomCat39
With a full tank I can travel 500 Km, (310. miles) maybe 550 Km (340 miles)
#11
Honda-Tech Member
Re: Poor MPG D15B7
Mate we have the same issue, i'd love to hear more people on this subject.. Specifically 1.5 d series. I've got a d15z6 {vtec-e even} And it gets about 500 km on a full tank aswell. Pretty poor in my eyes, my car does backfire like yours aswell, you hear it better during idling... I wonder if that could be related to poor MPG, my performance and everything seems good. Motor sounds/looks healthy aside etc
Did you notice a difference in KMs on a full tank before and after the tune-up? Spark plugs, filters, etc
GL!
Did you notice a difference in KMs on a full tank before and after the tune-up? Spark plugs, filters, etc
GL!
#12
Re: Poor MPG D15B7
Same story as yours, backfires at idle and deceleration, car works just great, poor mpg though.
Seems logical to be an injector problem, like not closing when it has to...I will start here.
And no, all the tunning i have done did not help.
Seems logical to be an injector problem, like not closing when it has to...I will start here.
And no, all the tunning i have done did not help.
#14
Re: Poor MPG D15B7
Europe rating is RON based from my research. Which is low speed testing for anti-detonation.
There is also a MON rating (not sure where it's used) and it's the high speed anti-detonation number.
USA ratings is based on AKI which is RON+MON/2 so is an average of the the high and low speed for it's ratings.
So really, I think a direct comparison is very challenging at best.
The above table I posted has been using USA AKI of 87 as the motor sees no benefit on the higher grade gases. It's designed for the economy gas of USA.
I think the closest equivalent over in Europe would be your 93 RON, the lowest that appears to be offered over there.
Also in my research it appears much of Europe is doing E05 gas which is 05% Ethanol while only a handful of European countries are using E10 which is typically sold here in North America but is just marketed as gasoline that "may" have up to 10% Ethanol. This was the story as up to 2014, might be more E10 being used in today's times and your country.
Also, I run a quality fuel injection cleaner through my car about once a year religiously. This might be part of the difference as everyone else is pointing out.
So, your MPG seems to be fairly impacted in comparison to my 3 years of results.
I found the RON/MON/AKI information on this site:
RON vs. Octane (US vs. Europe) Differences explained? - Rennlist Discussion Forums
Originally Posted by STLPCA
Chris - you are correct. Using 91 AKI gas should result in a slightly retarded ignition w/a resulting loss of power on a stock NA 993.
As you know, the "octane number" is a measure of a fuel's anti-knock (or pre-ignition) characteristics.
There are different accepted standards used to measure the anti-knocking characteristics of gas. The octane number you see at US pumps is the average of two such octane numbers; the Research Octane Number (RON) and the Motor Octane Number (MON). This average number is sometimes referred to as the Anti Knock Index ("AKI") or the US Cost of Living Council method ("CLC"). The RON and MON numbers are determined by American Society for Testing and Materials ("ASTM") laboratory tests. Thus, US octane numbers are described as, e.g., 93 AKI or 93 CLC. The equivalent RON number in other countries would be 98.
The RON method determines low speed and low load knock characteristics while the MON method tests high speed, high load, high temperature conditions such as exist during periods of high speed power accelerations, hill climbing, or any period of high power output. The MON method results in a higher octane number & is the more relevant value for racing.
Maybe more than you asked, but ... .
As you know, the "octane number" is a measure of a fuel's anti-knock (or pre-ignition) characteristics.
There are different accepted standards used to measure the anti-knocking characteristics of gas. The octane number you see at US pumps is the average of two such octane numbers; the Research Octane Number (RON) and the Motor Octane Number (MON). This average number is sometimes referred to as the Anti Knock Index ("AKI") or the US Cost of Living Council method ("CLC"). The RON and MON numbers are determined by American Society for Testing and Materials ("ASTM") laboratory tests. Thus, US octane numbers are described as, e.g., 93 AKI or 93 CLC. The equivalent RON number in other countries would be 98.
The RON method determines low speed and low load knock characteristics while the MON method tests high speed, high load, high temperature conditions such as exist during periods of high speed power accelerations, hill climbing, or any period of high power output. The MON method results in a higher octane number & is the more relevant value for racing.
Maybe more than you asked, but ... .
#15
Re: Poor MPG D15B7
I will add them to the list, thank you.
@TomCat39
Lowest grade we can buy here is 95, so i have to stick to this. Some friends of mine who are driving civics can travel 650+ km out of a full tank, so I don`t think is the gas
Should I use a 16 degree BTDC with this fuel? or go more retarded?
@TomCat39
Lowest grade we can buy here is 95, so i have to stick to this. Some friends of mine who are driving civics can travel 650+ km out of a full tank, so I don`t think is the gas
Should I use a 16 degree BTDC with this fuel? or go more retarded?
#16
Re: Poor MPG D15B7
I am assuming your D15B7 is built the same as the USDM or CDM version with the same compression ratio, pistons, deck height etc.
If it is the same exact motor (ECU has the same designation of P06) then it should be 16 degrees.
I think you should follow everyone's advise of cleaning your injectors.
I know Wynn's makes a quality fuel injection cleaner called Power Charge. I don't know what products you have available to you in your country. Not all products are equal.
#17
Re: Poor MPG D15B7
That was my point. Your fuel likely has less ethanol which means you should get higher MPG not lower.
I am assuming your D15B7 is built the same as the USDM or CDM version with the same compression ratio, pistons, deck height etc.
If it is the same exact motor (ECU has the same designation of P06) then it should be 16 degrees.
I think you should follow everyone's advise of cleaning your injectors.
I know Wynn's makes a quality fuel injection cleaner called Power Charge. I don't know what products you have available to you in your country. Not all products are equal.
I am assuming your D15B7 is built the same as the USDM or CDM version with the same compression ratio, pistons, deck height etc.
If it is the same exact motor (ECU has the same designation of P06) then it should be 16 degrees.
I think you should follow everyone's advise of cleaning your injectors.
I know Wynn's makes a quality fuel injection cleaner called Power Charge. I don't know what products you have available to you in your country. Not all products are equal.
I will take the injectors down and clean them and check for defects.
I will update the thread once I finish this step.
Thank you everyone for helping! :D
#18
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Re: Poor MPG D15B7
What method do you use to calculate gas mileage?
It sounds like you are intelligent and would calculate it correctly, but I've seen a lot of people on car forums complain about poor gas mileage just to find out that they weren't actually calculating it correctly.
20mpg would likely be a huge loss in power as well, and youd likely notice something major is wrong with the motor.
It sounds like you are intelligent and would calculate it correctly, but I've seen a lot of people on car forums complain about poor gas mileage just to find out that they weren't actually calculating it correctly.
20mpg would likely be a huge loss in power as well, and youd likely notice something major is wrong with the motor.
#19
Re: Poor MPG D15B7
What method do you use to calculate gas mileage?
It sounds like you are intelligent and would calculate it correctly, but I've seen a lot of people on car forums complain about poor gas mileage just to find out that they weren't actually calculating it correctly.
20mpg would likely be a huge loss in power as well, and youd likely notice something major is wrong with the motor.
It sounds like you are intelligent and would calculate it correctly, but I've seen a lot of people on car forums complain about poor gas mileage just to find out that they weren't actually calculating it correctly.
20mpg would likely be a huge loss in power as well, and youd likely notice something major is wrong with the motor.
I did this test many times and in different conditions.
Also, I run out of gas from a full tank to zero, in about 450-500 Km, 550 sometimes, depending where I`m driving.
Power wise everything is fine.
#21
#24
Re: Poor MPG D15B7
Hello, I`m back
The problem is still there.
What I did:
Removed the injectors and cleaned them, changed the o-rings, injectors are fine, no leaks.
I tested the compression, cold engine: 150 Psi; 152 Psi; 151 Psi; 150 Psi;
Failed a smoke test, this is the result:
Not sure why the test machine was reading the engine temperature 14 and 15 degrees, the engine was at operating temperature and running 5 minutes before test.
According to Autodata this is what I should get:
No headers leaks as far as I can tell.
To be honest, I do not know what I should test now...
Thank you!
The problem is still there.
What I did:
Removed the injectors and cleaned them, changed the o-rings, injectors are fine, no leaks.
I tested the compression, cold engine: 150 Psi; 152 Psi; 151 Psi; 150 Psi;
Failed a smoke test, this is the result:
Not sure why the test machine was reading the engine temperature 14 and 15 degrees, the engine was at operating temperature and running 5 minutes before test.
According to Autodata this is what I should get:
No headers leaks as far as I can tell.
To be honest, I do not know what I should test now...
Thank you!
#25
Re: Poor MPG D15B7
Ohm test the ECT sensor. If the ECU really thinks the engine is 14 C, it will be in open loop mode which means it runs it rich, resulting in high emissions and poor mpg. It is only supposed to do that until warmed up, then switch to closed loop where it uses the O2 sensor to lean it out. Along those lines also make sure your thermostat is OK (not stuck open) and of the stock temperature rating.
Fuel pressure should also be checked. If the vacuum hose on the regulator is not hooked up, the pressure will be too high and it will run rich.
Fuel pressure should also be checked. If the vacuum hose on the regulator is not hooked up, the pressure will be too high and it will run rich.