Auto Repair - Roadshow forum

Question

Engine stalls at idle, but only after a few minutes

by znbail / December 11, 2016 12:20 PM PST

So this past weekend I decided it was finally time to do a little maintenance. I did the normal stuff, oil, oil filter, antifreeze flush, fuel filter, air filter, spark plugs and wires, and I even decided to do the valve clearances this time around since it had been awhile. After I was finished with all that and did a little test driving around I was at a stop light and my car completely stalled! It's always been a little finicky, being forty years old does that to you, but something like this has never happened before. Obviously it's been caused by something I did, and I'm thinking there's something wrong with the spark delivery, it sounds like there might be some kind of miss in the engine and I can definitely smell gas coming from the exhaust. Any thoughts on what might be causing this issue? It's a 1980 Toyota Tercel.

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All Answers

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Answer
most stalls on cars that age are;
by James Denison / December 12, 2016 8:29 PM PST

either carburetor
or fuel pump, although that usually affects cranking, but on idle might drop pressure enough
or manifold vacuum leak, most often from an open PVC valve, or it's connection to the manifold, but can be from other vacuum hoses that have come off, cracked, broken. More rarely is a leak around a manifold gasket.

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I actually didn't think
by znbail / December 13, 2016 2:10 AM PST

about the PVC valve, I removed it when I was doing the valve clearances, I'll check tomorrow if that's the issue. I don't think it's the carburetor only because I recently cleaned and rebuilt it just 7 or so months ago.

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