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Turned out to be a combination of needing a tune up, which I did on the road to finding the real issue, which turned out to be a torn fuel neck filler grommet. The fuel was evaporating and spilling out while full during driving. It finally busted open at a gas station when I overfilled and...

I'm not following why you mentioned this, JR. Should I be checking this? If so, what am I looking for?

Yup, everything checked out fine.

Ok, it's been a while and the exhaust fumes have settled down quite a bit. Maintenance I've done since first post in order to get my MPG up from 10 mpg: All Motorcraft parts: 1. New rotor cap/button 2. New plugs 3. New PCV valve 4. New fuel filter (which was a PITA with the IRS in there now...

Also, side note: I got a code "21" for the coolant sensor temp being out of range, but the motor wasn't quite warm yet so I'd imagine that's why I got that code. I ran the car up to temp, ran the test again and everything came out fine, no code "21" when it was warm.

I agree, I should have codes on most issues that would cause a rich issue, but I have none. :bang: I ran the KOEO again and got "11-10-11". The KOER test went through the cylinder test dumped an "8" for the cylinder id test and the gave an "11" and that was it. I left the reader on for...

Question though, wouldn't that throw a code "33 EGR EGR did not open / respond to test"?

Yup, got a vacuum pump in that rat's nest I call a garage somewhere. Good tip, I will try that out, thanks!

My fox is running really rich. I just sold the beater and $3+/gal + 10-12mpg is killing me. I tried pulling codes and came up with nothing except "11". Both KOEO and KOER checked out fine. I was really hoping to get a code to help me out. Exhaust fumes are pretty bad considering I have...

Just realized that post was 3 months old. Oh well, maybe it will help someone else!

I'm just starting to do research on relpacing all the old R12 stuff, read your post, then ran across this pictures (link below): Replacement Air Conditioning 1990 Ford Mustangs Clutch Wires Photo "The wiring required to retrofit the R134a system is minimal. It's basically installing an...

I've decided to replace the entire A/C system as I convert to R134. The compressor is a rebuilt piece that was put in by an A/C shop in a small town I was just passing through when the A/C was going out. Not sure of the quality of their work, but the obviously didn't diagnose it correctly as...

rustang1992, Nice write up. I have a question for you on the bracket supports that are supposed to be attached to the tank straps. Do you have a picture you could post of it completed or explain to me what you did to make it work? I don't seem to have an easy mounting point. The bumper...

It's that time again!! We will be making a trip to Latemodel Restoration Supply on June 26th, 2010. Central Texas Stangs and other members in attendance will receive a 5% discount on performance and 10% on restoration parts. Resto recommends we call in our order ahead of time so they can pull...

It should still be on there. I don't remember running anything over lately. I'll double check when I get a chance to work on her though. I read a pretty good variety of resons that this might be happening earlier. It also shot down my fan huntch. ***Fan related problems will _not_...

Agreed, but I'd never had a problem with it before and it seems to have responded to everything I've done and is stable at low speeds so that doesn't make much sense.

Off the stock temp gauge.

Full o/r exhaust and 3.55's is about it.

1991 Mustang GT

I've been having overheating issues for a while now. The cooling system was in pretty bad shape so I've come to the assumption that everything was playing a role in the temp. At first it was overheating very quickly so I replaced the thermostat. Then, it was over heating at stop lights after...