Hey guys,

I purchased a '91 DX with a Dynaflex Spyder bodykit and It's getting really awful mileage, around 18-20mpg. Seems that the Sparco gas cap may be allowing vapors out, as I smell gas rather strong when driving. Does anyone know of a way to get a better internal seal using this kit/cap?

 

Hm, im no expert here, but I dont think "loss of vapors" through the gas lid would cause any noticeable effect in gas milage. Moreover, if you're smelling gas while driving I doubt its coming from vapors from the gas lid. Check elsewhere for actual leaks perhaps.

 

i recommend the same, check the fuel lines running from front to back and the fuel rail/injectors.

does it smoke or and cel? if its thrown in to limp mode it will probably get horrible milage.

 

Maybe it's the extra 500 pounds from the weight of the body kit.

 

its the dudes first post and your seriously gona troll him....


a kit don't weigh no 500lbs and even if it did 500lbs aint gona cut fule milage in half, if you cant help please don't post.


just noticed you said you can actually smell it while driving, either its leaking somewhere in the car (under carpet/fuel pump) or its under the hood.

 

You still have a vapor canister? If that's gone you could smell gas idk about the milage though

 

Yep, I'll check the lines and injectors.

Forgive me for not knowing, but what's cel and "limp mode?" Are they codes on the ECU?

I too, thought it might be the weight of the kit. But the kit can't be THAT heavy…

The interior gas smell is also present after being parked overnight.

 

CEL (Check engine light) is it on? if so do you know how to find out what the codes are?

if the light is on and your car is still obd0 which I assume it is pull back the carpet and count the blinks on the led in the computer (pass floor board)

despite what many claim, the obd0 does not have a fancy system for counting the blinks (long or short blinks) it is just short. 17 blinks and a pause = code 17,

4 blinks pause 5 blinks would be both code 4 and 5, ect.

limp mode is a failsafe tune the car will run on if something is on, usually makes the car run rich to reduce the risk of any engine failure, is basically just gives the car more fuel so it wont run lean (lean is dangerous)

Wikipedia definition:

Your engine management and maybe even your transmission is controlled by the ECU. As you know, all computers crash, all software has bugs, and mechanical equipment fails. As such, many ECU units are fitted with a 'limp home mode'. When it detects that something semi-serious is wrong, it enters the limp mode, which means that the engine won't rev beyond a pre-programmed speed, you can't accelerate very fast, or you may indeed be speed-restricted to 40 mph or similar. The transmission may even stay in one or two gears. Bad? Well, no, not really: The alternative would be to either let you drive at regular speeds, with the danger of letting you trash your car (expensive repair, means happy repair people, but angry driver), or stopping you from going anywhere (expensive recovery and stranded on the side of the road means happy recovery company, but angry driver).

 

You sir, are wrong.


OBD0 DOES use both short AND long blinks.
Short blink = 1
Long blink = 10

1 long blink and 7 short blinks = Code 17


Would you like proof?

 

My OBD0 doesnt do the short blinks, itll beep fast 17 times for a code 17, no long blink

 

yes I would in fact love to see your "proof" because I know for a fact long and short blinks starting in 1992 with the OBD1 systems.

 

technically the same thing, the blinks are steady and do not change to interpret 1 or 10.. your right 17 fast blinks for 17 I just worded it a little different and said short rather then fast.

 

Here is just the first video I found on youtube. If you want still more proof, I will take a video of my OBD0 B16A PW0 Ecu tomorrow.

 

That's a jdm ecu. welcome to 'mercia.

look at the comments in the video you posted, even the guys in there say its NOT long and short...

google search first result: http://www.socalcivic.com/forum/showthread.php?t=3886

also says im correct. this guy is driving a 91 civic DX which has a D15b2... NOT a JDM B16

 

Whether it is fact that OBD1+ uses long-short is completely irrelevant to what pre-OBD does.

pre-OBD didn't have any standard to follow so
-YES-
Honda actually did make pre-OBD ECUs that did short blinks
AND they made pre-OBD ECUs that did long-short blinks.

You are ignorant to correct information. Please stop making a fool of yourself.
USDM ECUs do it too. Just because YOU haven't seen it means absolutely nothing.

 

yes but not on the OP's d15b2 which is what im attempting to aid help with..

long and short blinks have been around on the JDM b16s and ect but not a 88-91 usdm civic

please explain my ignorance in knowing for a fact that the car in question does not have long and short blinks

F22 is claiming all ECU's use short and long and calls me wrong for it, explain my ignorance...

 

Other than you just adding in the car in question in more recent post to suit your needs?


Your original statement was:

Do you think ONLY the JDM ECUs blink long-short? Or do you have to spoon feed you some USDM Honda produced ECUs that do long-short?


Welcome to Honda-tech. Where have you been?

 

lol at the 3rd quote that is true...

I didn't specify the engine in question because the very first post by the OP said a 91 DX, which im sure we can agree has a d15b2 with only short blinks?

maybe I am wrong about that but ive searched only found the JDM B16 to have the long and short, (didn't look at EDM or any of the others, only USDM) what are the other pre-obd usdm ecu's that use long and short for future reference?

 

Please, Do NOT put words into my mouth. Find where I said "all ECU's".

 

no specification on what ecu, I can understand if you meant some use one and some the other but when someone refers to a specific ecu and you say that ^ it will lead people to believe you mean all.

call it a misunderstanding if you want, im not worried about it lol, just want to get the OP's car running correct.

 

Also, im 90+% sure my d15b1 ECU (pm5?) had short AND long blinks.

 

that's not a lx/dx/si/hf engine or ecu, is it the "std" Honda?, 88-91 civic so am I safe to assume its the std 4 speed base model?

pm5 is the DX/LX and has only short, a D15B1 is a PM9 ecu

D15B2 is DX/LX
D15B6 is the HF (8 valve)
and D16A6 is the SI/EX/AWD wagon (PM6)

 

off topic.
so you're telling me that honda wants their technicians to count 43 blinks (without miscounting them) for a Code 43? lolol.
90-91 integra are pre-OBD.

 

It was obviously a joke. Glad I came back to this thread to see you get ripped a new one -_- Take your own advice.

 

pre obd (obd0) civics (d series) don't have 43 codes.