Stalling Car
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Member
Joined: Oct 2002
Posts: 382
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From: Winnipeg,MB,Can
Car: 1991 GTA
Engine: 5.7L L98
Transmission: 4L60
Axle/Gears: 3.23
Stalling Car
My car is stalling pretty bad. Its seems to happen when the car is lightly idling of coming to a stop. Its starts up right away, but usually dies again shortly. If im at throttle it seems to be fine but if im not it pretty well dies out.
Senior Member
Joined: Jan 2004
Posts: 920
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From: Belchertown MA
Car: 1988 Pontiac Firebird
Engine: 2.8 Lt
Transmission: 5 Spd
I see this problem all too much:
I bet the answer is the IAC! Take it out and clean it, if really bad, replace, not to expensive $45. Good luck
I bet the answer is the IAC! Take it out and clean it, if really bad, replace, not to expensive $45. Good luck
Supreme Member
Joined: Feb 2003
Posts: 1,287
Likes: 1
Car: a car being parted out
Engine: blown up
Transmission: in peices
Originally posted by WinnipegGTA
Ah ****. Any guesses as where where the vaccum leak could be coming from. Just gimme some places to check maybe.
Ah ****. Any guesses as where where the vaccum leak could be coming from. Just gimme some places to check maybe.
Not IAC cause it only does when coming to a stop. Brake load, means vacuum being used to operate the brakes. Course could possibly (POSSIBLY) be actual brake booster has a tear internally, venting excess vacuum.
I would start the car and have somone inside press on the brakes. You hear a hiss, track it. Otherwise spray either water or WD40 on tubing/connections and when the engine studders, whatever you sprayed last is the culprit.
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Joined: Oct 2002
Posts: 229
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From: Cheyenne, WY
Car: '89 Camaro RS
Engine: LB8 V6 MFI
Transmission: T-5 5-speed
Axle/Gears: 3.42:1
An engine manifold vacuum leak is really easy to find.
Get a can of starting fluid and spray it around the base of the intake manifold, throttle body (not in the plenum), and around the vacuum hoses.
If the engine starts to 'race', then you know that you have a vacuum leak somewhere in the general vicinity.
Get a can of starting fluid and spray it around the base of the intake manifold, throttle body (not in the plenum), and around the vacuum hoses.
If the engine starts to 'race', then you know that you have a vacuum leak somewhere in the general vicinity.
Last edited by Mr_Metal; Jul 9, 2004 at 04:45 PM.
Senior Member
Joined: Jan 2004
Posts: 920
Likes: 0
From: Belchertown MA
Car: 1988 Pontiac Firebird
Engine: 2.8 Lt
Transmission: 5 Spd
I had the exact same problem with my car when coming to a stop.
Looked forever for a vacume leak was unable to find one, was ready to give up. Then my maf went on me, at first i thought my idle problem was the IAC, so i replaced that, i still had the idle problem but its stopped it from stalling at stops. Is it worse when the motor is at operating temps? Everyone who has had problems like this, it was due to the IAC. The IAC kinda creats a manual vacume leak for the motor for more vacume. When you apply the breaks you need more vacume. Hint: non work IAC, not creating vacume leak, when brakes are applied, engine is not able to keep up on vacume therefor stalls. I went threw this with my car, may sound crazy but it is true. Hope it helps
At least clean your IAC.
Looked forever for a vacume leak was unable to find one, was ready to give up. Then my maf went on me, at first i thought my idle problem was the IAC, so i replaced that, i still had the idle problem but its stopped it from stalling at stops. Is it worse when the motor is at operating temps? Everyone who has had problems like this, it was due to the IAC. The IAC kinda creats a manual vacume leak for the motor for more vacume. When you apply the breaks you need more vacume. Hint: non work IAC, not creating vacume leak, when brakes are applied, engine is not able to keep up on vacume therefor stalls. I went threw this with my car, may sound crazy but it is true. Hope it helps
At least clean your IAC.
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