Running rich..

Its nice to find a mustang site that’s close to home!! Im a newbie…so be easy on me!! Im having a issues with my 92 notch running rich…it was running just fine and I kept an eye on my wideband and over about a 3 day time period, it started running richer and richer. Now its to the point at 3K RPM, its pegged out on the WB at 10 and the motor cuts out. I thought maybe the O2 sensors went bad, so I put 2 new ones in and that didn’t help. MAF is clean. Can anyone point me in the right direction to go here?

Welcome! Read your other post with engine specs, what kind of MAF are you running and how old is it? Have you checked fuel pressure?

It’s a lightning 90mm MAF, I am unsure how old it is, I bought it used. It looks in great shape on inside and out, if that counts for anything! Yea, my fuel pressure gauge shows right at 38-40psi at idle, I have a adj fuel pressure regulator on it. The gauge is under the hood, kinda hard to see while driving…but I have a very willing friend I can stick under there to watch it while driving…LOL This problem is VERY frustrating to say the least. I suppose it is possible the MAF slowly went bad…?? When it cuts out at 3K RPM, I can push the pedal down and she GOES like normal…but keeps cutting out after I let off.

Hmm, lightning maf's are usually pretty solid....

Have you had a chance to datalog a drive cycle while it's acting up?

yea, i have a few data logs on it, however, im not that smart yet on being able to read the data logs to know exactly what im looking at!! Please tell me that you are!!??? lol

Yep, I can read them. what tuner and software are you using? who did the tune on your car?

i use quarter horse...Binary Edition....EEC. GREAT>>>thats awesome...you uh.umm..wanna help this frustraded guy before this pony gets to meet the bottom of a river!!?? A guy that lives in Atlanta remote tuned it...he did a great job fas as i can tell...atleast the car used to run good before this..lol.

Whats your email and i can email you the data logs i have, plus a screen shot thing. You got my heart racing and hoping theres a cure now!! Atleast if someone can understand the logs and maybe point me in a direction of whats gone wrong! THANKS A BUNCH!!

sent you a pm

Good luck Kevin...looks like Nolan is getting you squared away. Let us know what you find out.

Give me a ring tomorrow when you have a chance, few things I noticed on the data log.

Nolan
(918)527-8451

Could be many things. From MAF, Fuel Pressure reg, even the IAC and TPS sensors. If one of those is shot it could be giving false readings to dump more fuel. Also could just be your wideband isn't reading accurately and you have an unrelated issue. Are you getting any smoke out the tail pipes? Unburnt fuel smell?

yes, Nolan helped me out great so far!! He came up with looking like a faulty TPS..ill change it tonight and see what happens! This is the best form site ever....no one on any other site has offered me any help! Thanks guys and i lok foward to meeting some you at some events! I do have a inground pool...with diving board and slide..maybe one weekend i could get some you so come up and we can have a mustang pool party meet...LOL

I hope the pool party has better company then our last one

LMAO...i told my gf to wear the red one, not green! ha ha..guess its good thing she dont get on here or i would be forever on the couch!

That pic was from the pool party jared had the week after ours...

Jarrod, you're evil dude. I need eye cleaner!



Ah, that's better.

I'm going to the one Steve's going to...