strange idle condition
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Elder User
Joined: Aug 2006
Posts: 813
Likes: 1
From: foristell, missouri
strange idle condition
i just replaced my intake gaskets. when i got everything put back together i filled it up with antifreeze and started it up. it ran straight up to 3300 rpms and just stays there. the only thing i can thing of is this, i cleaned some of the intake manifold with some gas and maybe some got into the manifold. i thought i drained it good but i guess not. the throttle is not open and all the seals are on and in place ???????????? anyone know something else that could cause this.
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
A pretty serious vacuum leak, or a bad IAC or unplugged maybe? (Idle air control)
If the idle was fine before you removed the intake you may have a gasket someplace leaking sucking air. Or missed reconnecting some/several of the vacuum lines.
Any gas you may have got in it cleaning it would have evaporated or sucked in a burnt up in the first few seconds, the idle would have quickly returned to normal once it was gone.
If the idle was fine before you removed the intake you may have a gasket someplace leaking sucking air. Or missed reconnecting some/several of the vacuum lines.
Any gas you may have got in it cleaning it would have evaporated or sucked in a burnt up in the first few seconds, the idle would have quickly returned to normal once it was gone.
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
Did you use any kind of sealer on the gaskets? If not that could be your problem.
You can check first with a garden hose, let water slowly run/puddle up over/around the gasket mating surfaces, if/when steam pours from tail pipe you found the leak.
I'd check it first, may just be the upper plenum gasket. I wouldn't pull the lower again unless I tested first and knew for sure it was leaking.
A little water won't hurt the injectors, but avoid direct drenching/submerging them with the water.
You can check first with a garden hose, let water slowly run/puddle up over/around the gasket mating surfaces, if/when steam pours from tail pipe you found the leak.
I'd check it first, may just be the upper plenum gasket. I wouldn't pull the lower again unless I tested first and knew for sure it was leaking.
A little water won't hurt the injectors, but avoid direct drenching/submerging them with the water.
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Senior User
Joined: Mar 2004
Posts: 217
Likes: 1
From: southwestern,pa
Did you use any kind of sealer on the gaskets? If not that could be your problem.
You can check first with a garden hose, let water slowly run/puddle up over/around the gasket mating surfaces, if/when steam pours from tail pipe you found the leak.
I'd check it first, may just be the upper plenum gasket. I wouldn't pull the lower again unless I tested first and knew for sure it was leaking.
A little water won't hurt the injectors, but avoid direct drenching/submerging them with the water.
You can check first with a garden hose, let water slowly run/puddle up over/around the gasket mating surfaces, if/when steam pours from tail pipe you found the leak.
I'd check it first, may just be the upper plenum gasket. I wouldn't pull the lower again unless I tested first and knew for sure it was leaking.
A little water won't hurt the injectors, but avoid direct drenching/submerging them with the water.
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Lead Driver
Joined: Nov 2002
Posts: 9,557
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From: Concord, NC
You can check first with a garden hose, let water slowly run/puddle up over/around the gasket mating surfaces, if/when steam pours from tail pipe you found the leak.
Lead Driver
Joined: Aug 2006
Posts: 5,670
Likes: 13
From: Sand Lake, MI
Sounds like a bad thing to do yea, but doesn't hurt anything.
Gives about instantaneous results that can be easily seen if one does have a vacuum leak.
Gives about instantaneous results that can be easily seen if one does have a vacuum leak.
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