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Unread 09-16-2011, 07:10 AM   #1
usmarine3521
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Chevy 350 not running the same

Few days ago my buddy came over and said my engine was running rich and idle was too high. So he did a little tinkering and it sounded better. But now when I'm idling the jeep vibrates and almost sounds like it's pulsating. Also I used to go a whole week and a half without having to fill up and now I'm in empty within four days. Anyone have any insight as to what is going on. It is a chevy 350 sb in a 84 cj7

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Unread 09-16-2011, 08:08 AM   #2
Foundrydude
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Vacuum leak or ignition issue like sticking advance mechanisms. Also be sure the choke isn't staying on. When fixed you'll have to undo whatever "tuning" was done to try and cover the symptom.

good luck
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Unread 09-16-2011, 10:03 AM   #3
Cutlass327
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Either that or he just made it worse. Tell him to come back over and undo whatever he did, and explain to you what he is doing. If you lost MPG from his tuning, but yet you were 'rich' before, I don't think it is a stuck choke or anything.

I would go over the vacuum lines though, and check it for a stuck EGR valve and such. Cut a piece of pop can the size of the EGR base, loosen the bolts, and slip it under the EGR valve, then retighten the bolts. This will block it off for testing purposes..
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Unread 09-16-2011, 12:31 PM   #4
usmarine3521
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Quote:
Originally Posted by Foundrydude
Vacuum leak or ignition issue like sticking advance mechanisms. Also be sure the choke isn't staying on. When fixed you'll have to undo whatever "tuning" was done to try and cover the symptom.

good luck
Well I noticed that the electronic choke isn't connected.

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Unread 09-18-2011, 01:02 PM   #5
Foundrydude
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Hook the choke up.

An electric choke without a wire will still allow the choke blade to move with the carburetor temperature. Meaning when temps drop at night the choke will apply. Then the choke will stay on til the carburetor body warms up enough to disengage the choke, which is about 10X as long as if the wire is hooked up to the choke's internal heating element.
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