94mustang94

Here are a list of my mods:

Modifications include:Block bored .030 over to 306 cu in.,DSS Forged Pistons,AFR 165 Aluminum Heads 58cc,Comp cams Roller Rockers,Comp cams Camshaft,Ford Racing Crankshaft,Canton 9 qt Oil pan with pickup,High flow Oil pump,30# Ford Racing Fuel Injectors,255 lph Walbro Fuel pump,Aeromotive adjustable Fuel Pressure Regulator,Ported Cobra Upper and Lower Intake Manifold,Ford Racing Shortie Headers,MAC Cat less Prochamber Pipe (stock hpipe installed for emissions),MAC Cat back Exhaust with 2 inch Chrome Tailpipes,76mm C&L MAF housing with inlet tube and K&N Filter,70mm Throttle Body,MSD Ignition with MSD coil and cap & rotor,PA Performance 185amp Alternator,Under drive Pulley Kit and new harmonic balancer,High flow Water pump,9mm Ford Racing sparkplug wires, Rebuilt T-5 Transmission,SPEC stage 2 Clutch,Cross drilled Front rotors with Hawk pads,New rear rotors and pads,Ford Racing Strut tower brace,New OEM radiator,1997 Mustang GT 17in Wheels with 245/45R17 tires like new,Pro 5.0 ShifterSteeda clutch cable

Now for my problem. I am having a problem with the way the car is idling. It likes to surge up and down really bad even to the point of cutting off. I clean the MAF and the throttle body really good. It makes the car hard to drive. Whats else could it be?

FORD TOUGH

Did it do it before or after the mods? Have you checked for codes?

chevykilla89

Ford (Iac) idle air bypass valves are notorious for going bad. I would start with replacing that if u already havent. and the next step is to do a correct idle relearn procedure wich u have to do any time the idle air controller is unpluggd wich if u changd ur throttle body then u had to disconnect it.

depending on what cam u r running u need to adjust ur throttle position sensor also wich includes boreing out ur tps screw holes on the sensor itself with a simple power drill but u most use the correct size bit.
Ford Racing Tech-Line will fax u step by step procedure for the idle relearn and will give u an exact tps voltage setting depending on what camshaft u have.

Ford Racing Techline# 800-367-3788 Ask For RAY he nows them engines very well. hope that helps and let me know how that helps

chevykilla89

Ur going to need to adjust ur idle set screw also to bring ur idle speed up. mines set at 900 rpms with a B-camshaft and is ur MAF calibrated to ur injectors. B careful cleaning ur MAF they r very easy to ruin with the wrong cleaner.

94mustang94

how would i calibrate my MAF to my injectors? I took my iac out and cleaned it really good. its seems to have helped but for some reason when i stop the car at a stop sign or something it takes like 5 secs for it to idle down.

crusin92red5.0

thats exactly what mine does. i was told that was normal (something to do with the computer so that it doesn't die). Up your idle to 900-950 and check the fuel pressure.

YOu can't calibrate the MAF unless its a C&L and you have to get the proper tube. THe maf you have should be calibrated for the injectors you have. There usually marked on the MAF itself, mine is etched in to mine that says 24's

94mustang94

How did you fix you idle problem? Does your car surge too? What did you do to fix it?

crusin92red5.0

Do exactly what was stated in previous post. clean the iac, mess with fuel pressure, reset base idle, and check tps and so on. my problem i had was the wrong plugs in, they were too short (i lossed intructions and just winged it). i guarentee you'll fix it if you follow the steps.

like i said my idle still rolls when you intially start it (not bad) and on imeddiate cutoffs and restarts, but never dies and evens-out pretty quick.

chevykilla89

hello 94 mustang 94 . U must buy a maf already calibrated to ur injector size! Read the post i sent and do exactly as it says and call ford techline instead of dickn around.. ray will tell u what to do!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Trust me.