Well first off is I fill up my gas on Thursday and it costs me $26 for a full tank. Driving to work and back about 20-25 mi each way and drove somewhere else and back about 80 miles total and my itr used 3/5th of a tank (thats more than half a tank!

I've talked to couple of car shops and they say it might be cam timing or because I have a 255 fuel pump with AEM fuel rails and stock regulator with stock I/H/E and stock ecu (not tuned).

What do you think is the problem?

Thank you guys!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Addicted2Racing &raquo;</TD></TR><TR><TD CLASS="quote">Well first off is I fill up my gas on Thursday and it costs me $26 for a full tank. Driving to work and back about 20-25 mi each way and drove somewhere else and back about 80 miles total and my itr used 3/5th of a tank (thats more than half a tank!

I've talked to couple of car shops and they say it might be cam timing or because I have a 255 fuel pump with AEM fuel rails and stock regulator with stock I/H/E and stock ecu (not tuned).

What do you think is the problem?

Thank you guys! </TD></TR></TABLE>

Tuning

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Addicted2Racing &raquo;</TD></TR><TR><TD CLASS="quote">Well first off is I fill up my gas on Thursday and it costs me $26 for a full tank. Driving to work and back about 20-25 mi each way and drove somewhere else and back about 80 miles total and my itr used 3/5th of a tank (thats more than half a tank!

I've talked to couple of car shops and they say it might be cam timing or because I have a 255 fuel pump with AEM fuel rails and stock regulator with stock I/H/E and stock ecu (not tuned).

What do you think is the problem?

Thank you guys! </TD></TR></TABLE>
You are drawing conclusions from approximations, the margin of error is huge. Do yourself a favor and get a more accurate picture of your gas mileage before jumping to conclusions.

 

I know what you mean, but half or more tank of gas for under 60-80 mi. I drive to work everyday with my other 2 cars and usually a tank of gas will last me 1 week and not half a tank a day. Thank you.

 

The reading at the "top" of the tank is very subjective and can really depend on many factors, the actual pump, how long you pumped it for, how full you really went, how full the pump allowed you to go, etc...

You can typically have a very wide range of "fullness" register as 'F' on the fuel gauge. Not to mention that I don't believe it is exactly linear, I think the "end of the tank" is a better measure, but then again also keep in mind the 'gas low' light is a little sketchy at times, so that can play a factor.

When I'm monitoring fuel economy, I try to fill it up to the same amount from the same pump, etc, to try to minimize the huge sources of error there can be.

good luck

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DC2fanboy &raquo;</TD></TR><TR><TD CLASS="quote">The reading at the "top" of the tank is very subjective and can really depend on many factors, the actual pump, how long you pumped it for, how full you really went, how full the pump allowed you to go, etc...

You can typically have a very wide range of "fullness" register as 'F' on the fuel gauge. Not to mention that I don't believe it is exactly linear, I think the "end of the tank" is a better measure, but then again also keep in mind the 'gas low' light is a little sketchy at times, so that can play a factor.

When I'm monitoring fuel economy, I try to fill it up to the same amount from the same pump, etc, to try to minimize the huge sources of error there can be.

good luck </TD></TR></TABLE>

Let me drive around more and let you guys know in a few weeks. Thank you for the response.

 

If you filled up to where the gas pump cutoff then that is the same thing I do. I get over 300 miles befor the fuel light comes on.....

 

 

tuning could be an issue, you might be runnign way too much gas. But maybe your gauge is off. That would be my second guess.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Addicted2Racing &raquo;</TD></TR><TR><TD CLASS="quote">I've talked to couple of car shops and they say it might be cam timing or because I have a 255 fuel pump with AEM fuel rails and stock regulator with stock I/H/E and stock ecu (not tuned).
</TD></TR></TABLE>

You're probably running too rich because your fuel pump flows more fuel at a given pressure than the OEM one. You need to get a WB02 sensor and turn pressure down till the fuel flow is back to normal, and/or get the ECU tuned.

Or put the oem pump back in till you can get to a tuner. I don't know why you need a high flow pump for your application anyways.

Not sure if you're running open or closed loop, but the ECU may not have enough correction to run well even during closed loop operation.

No codes?

 

The integra fuel gauge in very inaccurate, the only true way of calculating gas/mileage is to fill to the neck, not when the pump cuts out. When it cuts out wait a few seconds to let the fuel drain down the tank neck and then fill slowly till you can see it at the top. Reset the trip odometer. After however long when the light comes on do the same again and divide the total miles by the amount of fuel you had to put in.

 

you filled up your tank for 26 bucks, DAMN YOU. here in canada gas is a dollar or more for ONE LITRE, it cost me close to 50 bucks to fill my tank.

 

i wanna know why your running a 255 pump and a aem fuel rail on a stock car, thats got to be a contirbuting reason to why your gettting paid gas mileage

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by El Pollo Diablo &raquo;</TD></TR><TR><TD CLASS="quote">

You're probably running too rich because your fuel pump flows more fuel at a given pressure than the OEM one. You need to get a WB02 sensor and turn pressure down till the fuel flow is back to normal, and/or get the ECU tuned.

Or put the oem pump back in till you can get to a tuner. I don't know why you need a high flow pump for your application anyways.

Not sure if you're running open or closed loop, but the ECU may not have enough correction to run well even during closed loop operation.

No codes?</TD></TR></TABLE>


I got a bad O2 Sensor Code, and code U2500 (what is code U2500???)


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 01-0720 &raquo;</TD></TR><TR><TD CLASS="quote">i wanna know why your running a 255 pump and a aem fuel rail on a stock car, thats got to be a contirbuting reason to why your gettting paid gas mileage</TD></TR></TABLE>

I bought the car with the 255 pump and AEM fuel rails. Not sure if I need it.

 

when my 02 took a **** on me i was gewttin about 5mpg city, and about 15 highway. now (turbo, 265whp) i get about 20 mpg city and about 28-32 mpg highway

 

fix your o2 thats definitly got somthing to do with it

and get stock fuel pump and rail, you dont need that stuff your car is stock

 

Quit hanging out in Vtec all day long. :-)

 

Change the 02 and get it retuned.

 

I guess now I need to buy a new o2 sensor! Anybody know where I can find one for cheap new other then the rip off dealership?

 

There are a few in the DFW FS thread for $35-$50

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Jowee 1162 &raquo;</TD></TR><TR><TD CLASS="quote">There are a few in the DFW FS thread for $35-$50 </TD></TR></TABLE>

WHERE WHERE?? I want one!

 

i think its a conspiracy with the gas/ oil companies their ****** up the formula so we burn gas quicker so they make more money haha..keep VTEC'n

 

 

on my GSR when i put about little less than 4gallon. i go about 125-130ish

 

I log every tank of gas I put through the car... I can get between 195-315Km from just past the full mark to a half tank and that is filling it to the lid. a full tank ranges between 335-520km I have never worked it out but I get good gas as long as I stay outta the vtec. then again we are looking at $1.38 per litre and there looking at another .23cent increase this week. I am going to be buying a horse and wagon that is over $5.00 a gallon!!!!