Idle and drive gear problems.
Thread Starter
Burning Brakes
Joined: Sep 2006
Posts: 967
Likes: 0
Idle and drive gear problems.
I've developed a problem with the engine idle. When I start it, it seems erratic and shakes but not too bad. The rpms are over 1000 in park where they used to be around 1000.
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I guess I should add that this all started with a backfire through the carb. Before this start, where it backfired, it idled and ran fine.
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I can adjust the idle mixture screws but it will either get faster or slow and start shaking badly.
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The choke was already hot so I can't test it, it's electric.
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When I put it in a drive gear like drive or reverse the rpms drop to about 500 and it shakes really bad like it's going to die and I hear a sucking noise like the carb is sucking in air through a straw.
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I checked to make sure all the spark plug boots were in place and secure and that the cap was latched down properly.
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I have tried rotating the distributor a little each way or back to the middle where it seems to run the best.
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I'm confused so who has some ideas?
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I guess I should add that this all started with a backfire through the carb. Before this start, where it backfired, it idled and ran fine.
-
I can adjust the idle mixture screws but it will either get faster or slow and start shaking badly.
-
The choke was already hot so I can't test it, it's electric.
-
When I put it in a drive gear like drive or reverse the rpms drop to about 500 and it shakes really bad like it's going to die and I hear a sucking noise like the carb is sucking in air through a straw.
-
I checked to make sure all the spark plug boots were in place and secure and that the cap was latched down properly.
-
I have tried rotating the distributor a little each way or back to the middle where it seems to run the best.
-
I'm confused so who has some ideas?
Last edited by Block_Head; Aug 21, 2007 at 10:19 AM.
Thread Starter
Burning Brakes
Joined: Sep 2006
Posts: 967
Likes: 0
Well, it's okay I guess that no one had any ideas because I got to looking around and found a rubber cap that came off or the main vacuum tree on the manifold. The previous owner set up a system where one of the ports went to the transmission and one was capped off.
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I guess when it backfired it popped that cap off and it was sucking air in.
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I didn't know a vacuum leak could cause it to run so crappy.
-
I guess when it backfired it popped that cap off and it was sucking air in.
-
I didn't know a vacuum leak could cause it to run so crappy.
Le Mans Master
Joined: Jan 2004
Posts: 8,295
Likes: 30
From: one night in Bangkok you are never lonely
Well, it's okay I guess that no one had any ideas because I got to looking around and found a rubber cap that came off or the main vacuum tree on the manifold. The previous owner set up a system where one of the ports went to the transmission and one was capped off.
-
I guess when it backfired it popped that cap off and it was sucking air in.
-
I didn't know a vacuum leak could cause it to run so crappy.
-
I guess when it backfired it popped that cap off and it was sucking air in.
-
I didn't know a vacuum leak could cause it to run so crappy.
