North American Turbocoupe Organization



Another Idle Question
Stephy Offline
Junior Member
#1
Okay...I read everything people wrote on setting the base idle. So I go and try to set it on my car. I unplug the IAC and try to start it...and nothing happens. The car will not start. No matter how high or low I have the idle set it just will not start. Any solutions to this. THis is my first car that I've worked on. So I'm learning as I'm going. So please bear with me. I think I'm doing a pretty good job so far.
Reply

Pete D Offline
Administrator
#2
Stephy, are you sure you are unplugging the harness to the IAC and not the one to the TPS? What year TC? You need to have the intercooler and hoses in place if it's an 87-88

------------------
NATO Member
88 TC X 2, 86 SVO, Main TC with K&N, 3"DP to 2.5"duals through Dynamax, Ric valve at 17+ and disconnected KS. Elite Bodega 16" chrome wheels. Autometer pod w/ A/F and Vac/boost gauges.140 mph Motorsports Speedo New engine: Total Seal rings and TRW pistons, ported and polished head w/ cc'd chambers,1.59"exhausts, SS valves, gutted upper, knife edged lower, A-230 cam, Race Engineering Adj Cam Sprocket, Crowlers, ARP head studs, and rod bolts. Walbro 255 HP pump and Kirban adj FPR, T-3. Centerforce II, KB subs and jack rails.
Pete Dunham


Reply

Stephy Offline
Junior Member
#3
I unplugged the harness to the IAC NOT the TPS. Believe me I checked that. All the hoses are inplace and everything. I even cleaned the IAC just the other day before I did this. ITs an 88TC, by the way. I just don't understand why it won't start without the IAC plugged in. Its just kinda weird.
Reply

Walsted Offline
Posting Freak
#4
What I would do in your situation is:
  • *Start the car with the IAC plugged in
    *Adjust the base idle screw so it is touching the throttle.
    *Remove the IAC plug. If the car dies, then there are other problems. It shouldn't die, though.
    *Back out the screw until base idle is where you want it.

Hope this helps.

------------------
Mike Walsted - NATO member
1986 5-speed TurboCoupe .
Mike Walsted - Sold my 1986 5-speed TurboCoupe
Reply

Jeff K Offline
Administrator
#5
Crank the base idle screw (at teh linkage on the front of the throttle body) so it contacts the little arm, and turn it another turn or 2. The car should start with the IAB disconnected. Let the motor run until it is warmed up, and turn the screw out until the idle drops to 750-800, and reconnect the IAB connector. Idle should pop up to about 1000 and be stable. Once the base idle is set, you will probable need to adjust the TPS closed throttle voltage.

------------------
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 20 psi, forced air intercooler, water injection, bypass valve, Ranger roller cam, subframes, etc., etc.. // 86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP nitrous, ignition, gears, suspension, etc., etc.... // 91 Escort: Bone stock winter car // 00 Windstar (wifes vehicle)
Jeff Korn

88 Turbo Coupe: Intake and exhaust mods, T3 turbo at 24 psi, forced air IC, water injection, BPV, Ranger cam, subframes, etc., etc.
86 Tbird 5.0 (original owner): intake, exhaust, valvetrain mods, 100 HP N2O, ignition, gears, suspension, etc., etc.
05 Taurus SEL Duratec daily driver
04 Taurus Duratec (wifes car)
02 Pontiac Grand Prix GT
95 Taurus GL Vulcan winter beater
67 Honda 450 Super Sport - completely customized
Reply

Dan E Offline
Posting Freak
#6
My guess..the Crank is off 180 degrees.

------------------
Dan Eaves
88TC 5spd, Crower 5.5" Sportsman Rods, Short Wiseco Pistons bored .030" Over, Ported Head with Polished Combustion Chambers, Gutted & Polished Upper, Ported & Polished Lower, Polished T/B, Ported E6, SVO T3 .63AR Turbo, Bosch Bypass Valve, 3" DP w/No Cat, 2 1/2" DynoMax single cat back w/DynoMax Super Turbo Muffler, RR Cam, K&N in Fenderwell, Gillis Boost Valve, Centerforce I Clutch, Removed A/C, Polished Wheels, Polished Valve Cover, Polished Crank and W/P Pulleys, Walbro 255LPH HP Pump, Kirban Adj FPR, and the DAMN Heater Core is new too !

NATO MEMBER (Vice Chairman...if it's a vice...I deal with it)
Dan Eaves
88TC 5spd Vermillion Red, Polished...everything...
Reply





Users browsing this thread:
1 Guest(s)



Theme © iAndrew 2018 - Software MyBB