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Mustang_289 · 09-04-2002, 05:46 AM

Our 88GT is pretty much stock - we do have: long-tube headers, underdrive pullies, electric fan, 130A alt. Nothing major to date - still is speed density.

Here's our problem - the car sometimes idles fine and than sometimes the idle slowly creeps up to around 2500 rpm. Do you guys think it's the EGR, TPS sensor, or something else? How can I test each of these to determine whether or not they're functioning?

09-04-2002, 05:46 AM	#1
Mustang_289 Registered Member Join Date: Sep 2001 Posts: 512	idle creeps up Our 88GT is pretty much stock - we do have: long-tube headers, underdrive pullies, electric fan, 130A alt. Nothing major to date - still is speed density. Here's our problem - the car sometimes idles fine and than sometimes the idle slowly creeps up to around 2500 rpm. Do you guys think it's the EGR, TPS sensor, or something else? How can I test each of these to determine whether or not they're functioning?