throttle sticking

Hethj7 · 11-30-2003, 12:54 AM

When I go to stop my car (it's a T-5), my throttle sometimes wants to stick around 2200 rpm's. When it is put back into gear, it wants to accelerate the car up to those rpm's. It doesn't do it consistently and I can't find any patterns for when it happens.

I don't think that the cable is just getting stuck, but am not certain. What should I check?

andy669 · 11-30-2003, 11:03 AM

First pull the intake tube off of the TB to verify the throttle blade is closing all the way. If it is, then check the IAC, it may be stuck.

Andy

Hethj7 · 11-30-2003, 10:40 PM

Thanks for the reply. Unfortunately I didn't have time today to check it out.

However, last night the throttle was stuck when I shut the car off. I started it up today and it was idling normal, so I assume this means that it is not mechanical and that the butterfly valve is closing all the way.

I will try to check the IAC sometime this week.

84LX89GT · 12-01-2003, 09:53 AM

You can take off the IAC valve and clean it out with carburetor cleaner (let it soak for 10-15 minutes) and use a pick or something to manually move the internal valve to make sure it moves freely. IAC valves getting carboned up are quite common. If the throttle is sticking, manually moving it by hand at the linkage on the body you will be able to feel it stick, which you could also try cleaning out just for giggles (they're teflon coated so ford doesn't recommend cleaning because it ruins the coating....but if the coating worked they're wouldn't be any carbon on it

)

11-30-2003, 12:54 AM	#1
Hethj7 Mizzou Tigers Join Date: Apr 1999 Location: weston, MO United States Posts: 1,455	throttle sticking When I go to stop my car (it's a T-5), my throttle sometimes wants to stick around 2200 rpm's. When it is put back into gear, it wants to accelerate the car up to those rpm's. It doesn't do it consistently and I can't find any patterns for when it happens. I don't think that the cable is just getting stuck, but am not certain. What should I check? __________________ 2006 Mustang GT 1990 LX GT-40 motor 262 horsepower, 307ft-lbs (sold but forever loved) 1998 Contour SVT Rice Haters Club Member #244

11-30-2003, 11:03 AM	#2
andy669 Registered Member Join Date: Jan 2001 Location: Moline Il Posts: 901	First pull the intake tube off of the TB to verify the throttle blade is closing all the way. If it is, then check the IAC, it may be stuck. Andy __________________ 88 coupe 91 LX NMRA Pure Street 5120

11-30-2003, 10:40 PM	#3
Hethj7 Mizzou Tigers Join Date: Apr 1999 Location: weston, MO United States Posts: 1,455	Thanks for the reply. Unfortunately I didn't have time today to check it out. However, last night the throttle was stuck when I shut the car off. I started it up today and it was idling normal, so I assume this means that it is not mechanical and that the butterfly valve is closing all the way. I will try to check the IAC sometime this week. __________________ 2006 Mustang GT 1990 LX GT-40 motor 262 horsepower, 307ft-lbs (sold but forever loved) 1998 Contour SVT Rice Haters Club Member #244

12-01-2003, 09:53 AM	#4
84LX89GT Mustangs Join Date: Jul 2000 Posts: 1,938	You can take off the IAC valve and clean it out with carburetor cleaner (let it soak for 10-15 minutes) and use a pick or something to manually move the internal valve to make sure it moves freely. IAC valves getting carboned up are quite common. If the throttle is sticking, manually moving it by hand at the linkage on the body you will be able to feel it stick, which you could also try cleaning out just for giggles (they're teflon coated so ford doesn't recommend cleaning because it ruins the coating....but if the coating worked they're wouldn't be any carbon on it ) __________________ 2005 Suzuki Hayabusa GSX1300-R 1980 Ford Thunderbird - 255 V8 ported heads, 5.0L ported stock headers, O.R. H-pipe and Flowmaster 2-chambers, dual roller timing chain hi-po Mack Truck hood emblem 1985 Mustang GT 5.0L T5, F-303, GT40p, headers, off-road h, flowmasters, MSD stuff, etc. Sold 02/06/04 1989 Mustang GT ET: 13.304@102.29 mph (5-24-03) Sold - 1998 Mustang Cobra coupe, 1/4 mile - street tires: 13.843@103.41 (bone stock)

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