Mustang idles at 1,500 RPM until I stop rolling
#51
Well I figured out the problem why car idling bad. As you recall with old BBK TB it was idling low when it came out the shop 8 months ago. So Im thinking there was something wrong with the TB replaced it with a new ACCUFAB TB and the idle was worse and sound like a 747 trying to land in my garage. As alot of you guys was right I had a vacuum leak somewhere. Well it was the new TB come to find out when I unplugged the MAF sensor it would atleast keep the car somewhat idling long enough for me to look at the engine. well with a flashlight and where the 747 sound was coming from I placed my hand over the noise area which was the TB and the high pitch would change as I inspected further with flashlight I could see a gap between TB and supercharger arm I could move the gasket with my finger back and forth even though TB was torque down and didn't move all I had to due was really torque the 4 screws down and it fixed my problem. Car idles perfectly and runs like a champ. anyway wanted to say THANKS for all your guys help.
#53
No it doesn't. I need to stci to that old saying cuz I'm an old fart. K.I.S.S.=keep it simple stupid. Lol. But I will tell you adding that JLT cold air intake did add some horses so in my head it was well worth the money I thru at it.
#55
Thanks atleast I can enjoy the car for alittle while before it starts snowing. I have a beater car I drive in the winter (That is front wheel drive with 13 inch rims so snow don't effect this car) and when mustang is not running right, LOL.
#58
Just saw all of this get ready because i think I have your solution since I just went though this not to long ago. Change your TPS sensor its like $25 at autozone and I bet it will fix the problem and you will kick yourself for all the crap you have put yourself through. My old TPS seemed to be working but I changed it out and put everything back to how my car was and no more problem with high idle or holding high RPMs and slowly coming down.
#59
You must not read thru the whole thread MRTDR I got the car fixed. It was the TB not torqued hard enough against the arm of the supercharger. It was torque down but had a gap between the TB and the gasket and the arm of supercharger. I could move the gasket back in fourth but the TB didnt move so I torqued it down really hard and it fixed all my problems. Thanx for trying though.
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ShaneB26154
4.6L (1996-2004 Modular) Mustang
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03-04-2021 04:05 AM