Bypass valve gone bad???

Nice work Dennis... It must be a great feeling to drive away with the car fixed. I wish I was close enough to bring you the car.

I don't have any cats anymore... it must be something else on my car..

Any ideas?

I have replaced the O2 sensors, all 8 COPS, new plugs, new belt, tensioner, idler pullies, alternator, and rebuilt s/c.

Cleaned the Air filter, MAF, TB and IAC. All hoses and pipes intact and tight.

I just had new mufflers put on today. (Oems had internal crap loose and rattling).

The car still runs rough and on the highway runs well, but when I take my foot off the gas the idle surges and the fuel pressure is all over the place.

I am jsut going in circles trying to figure out what the hell it is!
 
John I wish I could help, but I can't fly out there, the car ran perfect when it left here correct, till you took the sc off, and this problem is not sc related, as I have said what I can do is help when you get the car to a sct dealer or some one that knows what they are doing. Any good Mustang shop should be able to figure this out. I have asked SCT for a good dealer out there for you, the only other person I know of is Bruce Tucker at JBA racing.
 
Thanks Dennis!!!

Its about 10:30pm Sunday night and i just back home to South Carolina from Florida. Dennis and his crew did an excellent good helping me with the MM as always:banana2:. Like Dennis said this was a very unique problem that I was having...for a minute I thought it was time for a new engine! I'm the original owner of my MM, I purchased it in 2004 and from the first day I drove down to Orange Park to meet Dennis he has and always will be the only person I trust when it comes to advice, maintenance, or performance maintenance on my car...thanks again Dennis! Yeah Dennis I got the new front tires Saturday evening before I headed out this Sunday afternoon, I made it home safe... thanks for your concern.:D
 
I have never in ten years heard the noise this car made, I truly thought the motor was hurt.

You wanna talk about first time for everything? My cat got clogged on my Grand Prix GTP, got so bad gas COULD not escape through it, instead, while going up a hill the backpressure blew a ****ing hole right through my upper intake manifold! You wanna talk about loud noise?!?! :eek:
 
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