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ok...no idle: fuel pump?

I went out to check voltages (using a meter on the cigarette lighter). 12.3V with the key on, 14.1V (plus or minus about 0.1V) with the engine running at 2K. Seems solid. Turn the engine off, voltage drops slowly down to about 12.3V.

But, it won't idle. It catches no problem, swings up to about 1800rpm, then drops to zero dead. If I step on the gas it will run fine. It does seem like the fuel pump is buzzing pretty loud, and it even is buzzing with the key in the on position (not all the way to start).

So will a weak fuel pump give a no idle problem?

Old 01-06-2004, 08:30 PM
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Tried to PM you, but box is full. Time to empty it?
Old 01-06-2004, 11:42 PM
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Sounds like it may be a vacuum leak, causing a too lean at idle condition, thus stalling. I would check the vacuum lines and connections. I would not think it was the fp, being engine will run at higher than idle speeds, sort of like being force fed, to overcome for vacuum loss at low speeds, generally an electric fp either works or does not and the engine speed really does not have much effect as long as it is getting voltage to the pump. I think the early ones, turn fp on anytime when key is in the run position
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Old 01-07-2004, 03:27 AM
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Todd, make sure the air box is sitting in place. I dont think it is a fuel line problem. Is your oil cap on thight?
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Old 01-07-2004, 06:40 AM
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Does it behave the same when warm & cold (can you drive the car around for awhile & see if it still won't idle when hot?)

I would check
1/ fuel pressures
2/ vacuum leak (big)
Old 01-07-2004, 07:41 AM
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Did you check your throttle linkage. Mine was came loose once - same results. Just a thought ...
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Old 01-07-2004, 08:00 AM
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this am when it was cold, it would idle but not at 1800 like normal, more around 1300. Then when it got warmer idle dropped down to about 600 instead of 900. When it got fully warm, it would try to idle (swing once or twice) then die. If I keep my foot slightly on the pedal I can get it to idle about about 1K or higher.

When I was adjusting the rear deck I had to reach in deep to pick up a washer I'd dropped. Chould that have moved the air box? Although it ran fine that night (I did a PCH run). What are the mostly likely vaccum leak spots?
Old 01-07-2004, 08:51 AM
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Quote:
Originally posted by nostatic
this am when it was cold, it would idle but not at 1800 like normal, more around 1300. Then when it got warmer idle dropped down to about 600 instead of 900. When it got fully warm, it would try to idle (swing once or twice) then die. If I keep my foot slightly on the pedal I can get it to idle about about 1K or higher.

When I was adjusting the rear deck I had to reach in deep to pick up a washer I'd dropped. Chould that have moved the air box? Although it ran fine that night (I did a PCH run). What are the mostly likely vaccum leak spots?
Todd,

You could have a vacuum leak (locate by spraying WD-40 around the induction system) or your mixture can be off. I had similar problems with my car and once my wrench put it on his CO analyzer, the problem was clear. A bit of adjustment, and everything was ok.

I am sure you have seen this, but just in case, try this Troubleshooting Chart
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Old 01-07-2004, 09:04 AM
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Check that pop off valve & seal too.

Old 01-07-2004, 09:12 AM
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