TPS reading was at 1.10 throttle shut and 4.83 throttle fully open, steady climb all the way up...
now it's at .97

Well... I did the cylinder balance test, and it was fine, so no worries there. I noticed when I'm driving it that the a/f gauge goes rich at 25% throttle, and now notice when I rev it that there is in fact black smoke that comes out when you first rev it. It never did that before! What causes a rich condition?
koeo codes were 11 and cont mem was 34 as usual
koer codes were the same as always: 94 and 44
Could the O2's be clogged? they're about as old as the egr...6 yrs old.
I have to jack it up and take them out, I've developed a black widow problem under the car though, so i'm gonna spray like mad before i go under there!!! :eek:and it's been soooo slow at work, I havent been able to get parts I need! :mad:

Instead of pulling the O2's, there are a couple easy voltage tests you can do on them to see if they are working correctly. If you don't have a copy of the book "Ford Fuel Injection & Electronic Engine Control", by Charles Probst, I'd deffinitely pick one up. It covers how to test nearly all sensors on your motor. It's the best money I've spent, and has more than paid for itself by letting me avoid replacing perfectly good sensors I thought were bad.

There may be a newer version of the book out.

I still think that you and I are in the same boat with the problems we're having. I'm beginning to think it's more of a timing issue - not enough/no advance. This could create a temporary rich condition when you're reving it. It also would be a problem that could come on suddenly.

I need to go borrow my friends timing light and see whats up there too! I'll post results! :)

i had the same problem on two of my mustangs, and 89 and my 95, a buddy of mine had the same prob. on his 90. find someone with a mass air that works, that was the problem with all of mine. it would rev fine part throttle but when you would give it about half throttle it would fall on its face. it almost acts like its reading full throttle when the gas is only at 1/4 throttle. that would be the first thing i would check, from my past experiances. hope that helps.

OK Finally I figured out how to convert it to an Mpeg file!
Let me know if it works!
The vid of the engine stumbling:
http://www.joe4speed.com/badstang.mpg

since your getting really rich at part throttle, and your tps is set ok, i would check the mass air. i have had many go bad in the past and they acted the same way yours is. it moves out better at part throttle, then when you move the throttle past a certain point it falls on its face. im telling you just try it, switch it with someone elses thatyou know works. youll thank me (i hope) lol

Switched the mass air sensor out with a friends that runs good, and it made no difference.
As of yet, work has been realllly slow so I haven't had a chance to buy a new egr or o2 sensors.
Here is a vid of the gauges inside the car:
Click here!

I need a gun!
 

GRRRRR!!!!


Well, I replaced the EGR valve and sensor today to no avail. The car ran like $hit the moment I started it and drove it around the block, and, frustrated, I floored it in the carport and let it bog itself down till it died. Now it won't start at all, but it smells really rich, so maybe it's flooded. The fuel pressure is good, even when it's bogging so I don't think it's the pump or filter or FPR. (although there is some black smoke when it does bog (rich)) It drives perfect till you hit the gas past 1/4 throttle. and even then sometimes it runs perfect even when you floor it. but 98% of the time it just bogs, and misses really bad.

WHAT AM I GONNA DO?!?!?!?!?!?!?!?!?!?!?! Especially now that it won't start!

Well it started so it must have been flooded. God it runs like ****. How can it be so rich when it's showing normal on the fuel pressure and a/f gauge???

Have you double checked the engine timing? How much vacuum do you have at idle?

Basics, I know, but....

The timing is at 12 degrees with the spout off... alot higer with the spout on.

vac at idle is about 19-21 inches

Joe, forgive me, but could we just start this over again? I'm lost.

Take care,
-Chris

LOL where should I begin, Chris???
It runs good until you give it past 1/4 throttle where it bogs out. and wants to die. You thought it could be EGR related, but unfortunately turns out it wasn't. I'm at my wits end here. :(

clogged converters?

I have off-road h-pipes, so unfortunately, that can't be it!!! Thanks, though! :)

muffler bearings? :)

I feel your pain. I'm going through the same thing. I can't push it past part throttle or my stang sounds like I drove it into a pool. I can't even race the honda's over here in Miami and I have a 12 second car. What I noticed was that my fuel pressure gauge pulses between 38 & 44 psi while I'm idling. It never did this before. If I adjust the fuel pressure in any direction the pulsing will stop temporarily but will return to pulsing once I drive the car.
I would suspect a head gasket leak but I don't have any unusual water loss. You never know. I always run on the rich side and it smells like I do also. I bought a new TPS and I cleaned my EGR with short lived results. Please Please Please, if you find out what let me know. I'm going to start a thread as well. Good luck.

Just me- sounds like you need a new fuel pressure regulator. Have you tried that?

I have a spare regulator but I like the looks of my current one. Oh well. I'll try anything at this time but my regulator is only a year old and it would suck to find out its done for. Thanks dude. Anyone else have any ideas. I'm going to print out any responses and tackle them all at the same time tomorrow. Thanks again