changed tb now high idle

aar0s · 03-21-2004, 08:58 PM

i put a accufab 65 mm on and now the cars idles between 1000 and 1500. I had to fab up a gasket for the tb to egr so im not real sure if it tore letting in air or if the cable on the out side bottom of the tb is too tight holding the butterfly open alittle. oh yeh the cars an 88 so its N.A. can anyone help?

Comatose · 03-21-2004, 11:04 PM

Check the throttle stop screw to see if it's holding the throttle butterfly partially open. Also check the tps voltage.

sedanman · 03-21-2004, 11:22 PM

Is this a used tb? If so did anyone drill a hole in the throttle plate? Also make sure you check throttle stop screw (the most likely culprit). Also make sure the mechanical linkage is not hanging up on anything.

aar0s · 03-21-2004, 11:29 PM

i bought the tb from a guy i know. already checked the screw. i dont remember seeing a hole in the throttle plate, is there sposta be one? Im not sure if the linkage is hanging up or if i may have got the tention too tight when i pryed it off or something.

sedanman · 03-21-2004, 11:32 PM

There is not suppose to be a hole but some drill one for big mod cars to allow enough air at idle. Also if your TPS is off it can cause problems too.

03-21-2004, 08:58 PM	#1
aar0s Registered Member Join Date: Nov 1998 Location: southern Illinois Posts: 312	changed tb now high idle i put a accufab 65 mm on and now the cars idles between 1000 and 1500. I had to fab up a gasket for the tb to egr so im not real sure if it tore letting in air or if the cable on the out side bottom of the tb is too tight holding the butterfly open alittle. oh yeh the cars an 88 so its N.A. can anyone help? __________________ 88 gt convertable =-= cobra intake, accufab 65 mm tb headers alum underdrives steeda alum.lca's, springs, c/c plates kyb struts 230 hp to da wheels http://www.cybersteed.freeservers.com

03-21-2004, 11:04 PM	#2
Comatose Registered Member Join Date: Oct 2001 Location: Goldendale, WA, USA Posts: 84	Check the throttle stop screw to see if it's holding the throttle butterfly partially open. Also check the tps voltage. __________________ Jeremiah 1986 Mustang GT K&N Filter, Removed Air Silencer, Black Magic Fan, 65mm Explorer TB, 110lph BBK Fuel Pump, F/M Force II Cat -Back, O/R h-pipe, U/D's Timing@14* 1986 Mustang LX SSP--new project car AOD, 3.27's, Dumps, 238k miles

03-21-2004, 11:22 PM	#3
sedanman Registered Member Join Date: Feb 1999 Location: Indianapolis, IN Posts: 963	Is this a used tb? If so did anyone drill a hole in the throttle plate? Also make sure you check throttle stop screw (the most likely culprit). Also make sure the mechanical linkage is not hanging up on anything. __________________ 04 Screamin Yellow Cobra KB 2.4 (585/556 pump 626/666 race) 00R brakes, DFX clutch, Level 5's, return fuel system, Lts with 3" exhuast, FR500 wheels and all the other fun stuff. GONE 1991 Lx sedan 5.0, 5spd (Liberty proshifted TKO) S-trim, Ported TF heads everything parted out.

03-21-2004, 11:29 PM	#4
aar0s Registered Member Join Date: Nov 1998 Location: southern Illinois Posts: 312	i bought the tb from a guy i know. already checked the screw. i dont remember seeing a hole in the throttle plate, is there sposta be one? Im not sure if the linkage is hanging up or if i may have got the tention too tight when i pryed it off or something. __________________ 88 gt convertable =-= cobra intake, accufab 65 mm tb headers alum underdrives steeda alum.lca's, springs, c/c plates kyb struts 230 hp to da wheels http://www.cybersteed.freeservers.com

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03-21-2004, 11:32 PM	#5
sedanman Registered Member Join Date: Feb 1999 Location: Indianapolis, IN Posts: 963	There is not suppose to be a hole but some drill one for big mod cars to allow enough air at idle. Also if your TPS is off it can cause problems too.