After Pro-M 80mm & PIH kit (poor & surging idle) ???????
 

after installing the pro-m 80mm maf & pih harness w/A9S(old style computer), MAD rev.& mad performance, but bad idle, surging idle even at cruising at 2000-2500 rpm, Also the rpm surge when the car comes to compelet stop or the car goes off.


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94 COBRA # 926/5009
TFS track heat heads (ported), Cobra intake (ported), 24# Injectors, 3/8" Phenolic spacer, E303 Cam, TFS 1.7 rr, BBK 1 5/8" headers, BBK 65mm TB, C&L 73mm (not calb. yet), FMS 3.55 ratio, BBK 190 lph fuel pump, Paxton fpr, MSD'S, K&N in fender, March Pulley's, Pro-5 tower power shifter, Autometer shift light (5600), Intellitronix Air/Fuel gauge, Eibach Sportline Springs, Tokico 5-way adjustable, Edelbrock Mufflers w\ 2.5" exhaust system, Clear Marker Lights, Aluminum Gril

I had this problem initially. It was cured by adjusting the TPS sensor to between 0.995-0.999 volts.


TFS Twisted Wedge O-ringed Heads (Fox Lake CNC Stage I Port), FRPP Cobra
Intake (Lower Port Matched to heads), Lunati #51014 Cam, Pro-M 80 MM MAF, FRPP 65 mm TB, Adjustable Fuel Reg, 190 LPH Fuel Pump, 1.6 Bolt Down Roller
Rockers, 6.7" chrome-moly push rods, TFS Guide Plates, FRPP Roller
Lifters, FRPP Double Roller Timing Chain, FRPP Polished Cobra Valve
Cover Kit, TFS Plenum Spacer, FRPP 24 lb Fuel Injectors, Graphite Head
Gaskets, FRPP 3.55 Ring and Pinion, MAC Long Tube Headers, MAC Hi-flow H-PIPE
w/cats, Flowmaster "Force II" Catback system, MAC Underdrive Pulleys,
MAC Subframes, K+N Filter, 180 thermostat and FRPP 9 mm ignition wires


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'93 GT Conv.
13.35 @ 104.8 mph

I had to back the throttle plate idle screw completely off and re-set the initial air, re-re-set my TPS and borrow a friends MAF while Pro-M re-calibrated the meter I specifically ordered for the PIH kit.

Do you have a cold air kit? Did you mention it when you ordered the meter? Pro-M claims they have to calibrate specially for cold air tubes. Then again, I ordered a meter for the stock air box and they still couldn't get that right.

Have you checked the car for codes? I've been getting a bad Vehicle Speed Sensor code and my mech says that might be my idle problem. I wound up backing my timing back to 10 deg (had been running 17) untill I can get better weather so I can tune it.