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I have cleaned the IAC and that helped a little. The IAC is only a year old. I haven't even thought of changing the tps, maybe I should. I hope its not a tb those are expensive, likewise for the MAFS.

I tracked down a video of the problem I am having. This is not my car but mine does the exact same thing, only mine will be so bad that it will occasionally die. It is driving me crazy. Mine does it regardless of whether the air is on. http://www.youtube.com/watch?v=ITX_dM3R1ao

A drop down to 3.73's:shrug:

So not to long ago I installed my X-pipe. It ran fine for a week, then my car died on the highway...ended up being the alternator. Well I have had problems ever since replacing that. My car now has a MIL with like 4codes. Well through some research on the codes I found out that it could be a...

Not true. My car died a few weeks ago while on the highway. Battery was drained so I assumed it was the alternator. Just to check I did the good ole method of unplugging the battery from the alternator while its running. If the alternator was dead the car would not run, well it did. It continued...

Thank you so much svttech76:hail2: I am glad I stumbled on this. Long story short, I put an x-pipe on a month ago with mil eliminators. Drove fine for about a week, no mil. On a trip my alternator died. Replaced that and my car has had a light and ran rich ever since. Got the codes pulled ended...

I think I am having the same problem. Did you guys ever get stumbling/bouncing rpm's? Mine will sometimes bounce between 900-500 up and down and then smooth out for a little while? Possibly bad coil pack? It has newer spark plugs so thats not the prob. It does need a fuel filter change:shrug:

I replaced the IAC last year:mad: I guess I will give that a try.

Ok long story short I was getting 24mph before the swap and now I get 19, while shifting at the same rpm's same roads I can't afford this with the gas the way it is. Do x-pipes usually lower your mpg's? I have a check engine light so will that maybe make it run really rich? I just can't...

This is a prob my car has had ever since I bought it. Say I am backing out of a spot, when I push the clutch in to get out of R the rpm's will drop so low that it will almost die It does this when just sitting in nuetral, the rpms will sometimes bounce between 900-300-1000-700-250-900 you get...

And then I can take my PI 4.6L and drop it into my Nissan truck:jaw: :rlaugh:

What would be impressive is a turbo diesel into a mustang swap:nice: That would be sick!:hail2:

Honestly, it was running a little bit rough after I did that. It has not thrown any codes which is odd. It originally died on the interstate while driving at a constant speed. The battery was pretty much drained so I figured the alternator went out but I guess not:shrug: Right now it is 40miles...

I was trying to diagnose a bad alternator earlier today on my mustang. I did the old method of starting the car and unhooking the positive terminal. Supposedly if the alternator is dead and its running off the battery, it will die. Well my car kept running which means the alternator is good but...

But what could cause the smoke? It seemed to be coming from either under the car or near the firewall. My x-pipe might be loose but I havent noticed smoke before. God I hope whatever it is its not bad:nonono:

*Update I went back to my car today with a new battery, hoping to plug it in and run it until I got my car back home. Well before I plugged the new battery in I decided to give the alternator a test to see if it was dead. I turned it on and unplugged the positive terminal and it kept...

Guys please help me! I was heading to Iowa city today when all of the sudden my radio went dead. At first I thought that my cd player crapped out on me, I told my girlfriend "This better not be broken, I don't have the money to buy a new one" Not even a minute after I told her that my rpms...

I just recently put my o/r x-pipe on and to be honest I don't remeber seeing a drain plug on the ole t-45. I was wondering if anyone knows where to find a how-to guide on how to change the tranny fluid. My car has 90k miles on it and I doubt that it has been done before. Also what fluid do we...

I'm really wondering if he put the wrong intake on. I'm not 100% sure where the alternator bracket on a non pi intake is, but I would imagine that it would be in the same location. Ford did not add the aluminum crossover until I believe 02'. I'm stuck with the plastic one:nonono: Even if it was...

I was able to get the dreaded header bolts off easily, what I am having troubles with is the o2 sensors. I was able to get 1 of the rear o2 sensors off but the front ones will not budge. I am using a 20 or 22mm open ended wrench. I have sprayed the **** out of them and given it all my strength...