GT 4.6 ,24 VALVE, LOPING IDLE.

2005 Ford Mustang

Tiny

STEPHEN FISHER

October, 18, 2011 AT 12:03 AM

Replaced manifold, installed C&L performance manifold and 62mm L&M throttle body and ford racing cold air kit. Used bama custom tuning. Troubleshot, found no vacuum leaks. No manifold leaks. NO IAC valve on 4.6 liter, on cold starts high idle than after about 3-min's begins to lope between 700- 1500 rpm's. All this started after tuning and mod. It will stop when air conditioner is turned on. Or put in drive, (automatic-transmission.) Haven't replaced any sensors. Could this be a bad TPS, Thottle postion sensor? Or should I replace the MAF TO A AFTER MARKET SENSOR? I think I'll get my multimeter and do some testing. Any other advise. Also could the MAF be maxing out?

2 Answers

Tiny

Jacobandnickolas

October, 18, 2011 AT 12:39 AM

With aftermarket parts, I don't have a manual to refer to. It could be the MAF.

Tiny

fixitmr

October, 18, 2011 AT 1:17 AM

What about fishing net for ford/mustang performance/mod forum to seek others who may have had this problem?

Please login or register to post a reply.

Code Read Retrieval/Clear - Dodge Stratus
Code Read Retrieval/Clear Scion XD
Code Read Retrieval/Clear Chevrolet Camaro
Easily Clean Your Throttle Bore Like a Pro
How to read codes Chevrolet Blazer