Sorry for the long post in advance.
Okay guys, i've been trying to track down this raw fuel smell that keeps popping up in my car.
The last two weeks my car has been getting a raw fuel smell at random but usually after I drive it for awhile or go race it, it shows up. I'm not finding any leaks under the hood or anything and I thought maybe I fouled my plugs cause I ran the car without O2's for about 2 weeks. Also, the SES would come on after awhile when that smell would show up. well i changed my plugs last night with NGK TR55's and it didn't change really (although i'm glad I did it cause I discovered a loose plug and some were not gapped correctly.) I started it up let it warm up and 5 minutes later when I went to leave, the SES was on. I'm not sure what code it's throwing but it was running okay. car drives fine but seems to have like a 100 RPM surge when cruising.

Never got the smell till after awhile and couldn't figure out where it was coming from. Got home and tried to find the source, and I ended up pinpointing it to area around the fuel door and in the wheel well. i opened the fuel door and unscrewed the cap and it had a TON of pressure in it. These caps are supposed to vented right? Could this be my problem? Can this throw the SES light?

Any suggestions?

 

Have. It. Scanned.

 

One better since he has a 93:

http://shbox.com/1/dlc2.jpg

Btw joe I love that sig pic of your car launching, sounds awesome too!

 

Thank you sir.

And good call on the 93 paper clip trick!

 

Okay so does this mean that there are only 12 codes a 93 car can flash? And if I understand correctly, it will flash the light a certain number of times (example: code 6 flashes 6x?) and will flash that number 3x?

I've heard of this method a long time ago but never have done it and it sounds complicated.

 

If you can program a remote you can read your codes. The explanation in the link is pretty thorough, but I will simplify it for you:

Insert paper clip to connect terminal A and B (two top right-most terminals).

Turn the key on.

The SES will flash once (for 1) and then twice (for 2). 1+2 = code 12. It will repeat this 3 times. This is just telling you the PCM is in diagnostic mode and means NOTHING in terms of your current codes. Once the DTC 12 has flashed 3 times (DTC stands for diagnostic trouble code)...

It will then flash your current stored DTCs. You'll see it flash X amount of times, then pause, then flash Y amunt of times. SO if it flashes 4 times, then pauses, then another 3 times, you have code 43 stored. Any additional codes will then be flashed in the same fashion.

It's easy once you do it.

 

Okay that's a little better! I'll give it a try tonight and see what happens.
Thanks for the help!

 

so can u do the paper clip trick on a 94 formula

 

No, only 93s.

 

so i got one of those cheap 30 dollars scanning tool from oreillys should that work

 

anybody? the tool is suppose to flash ses light to get dtc?

 

Will a clogged EVAP throw a code? Im not getting any codes, and Im getting a bad gas smell at the rear of the car. Im also getting pretty crappy gas mileage.

 

Won't work. A real scanner is needed. A $30 scanner is nothing more than a glorified (and expensive) paper clip.

 

That is the exact symptoms i'm getting and the code my car is throwing is CODE 26 which is the EVAP Purge Solenoid so I suspect you and I have a similar problem.

 

well wen i did try n scan my codes with that pos scanner the ses light only comes on every now n then n when it does come on the ses wont flash it says to check my diagnostic circuit check how do i fix this problem so i can scan the codes ?

 

Get a real scanner, as suggested.

 

ok i have datamaster all i need is the cable my question will it read the codes unlike the pos scanner that just flashes the ses

 

Of course.