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Engine stalls 700 1990

posted by  someone claiming to be myersnsoda on  Wed Jul 30 02:55 CST 2008 [RELATED]

My '90 740 wagon has begun loosing power, then stalls. It restarts and runs OK, then repeats stallout. Is this a vacuum leak or an A/C related issue? Or something else?








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Dirty fuel filter did this to me 700 1990

posted by  Volvony on  Wed Jul 30 18:05 CST 2008
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last visit: Sun Jul 6 08:57 CST 2014
[RELATED]

When the crude in your fuel filter packs up against the filter element, your car might stall out. When the car rests, the crude loosens up a bit and lets the car run normally until it all packs into the element again. The problem was pronounced at higher RPM operation in my case. The fuel filter is located under the drivers seat.

The only way I can think that your ac has anything to do with this is if the little relay that boosts RPM when you turn on the ac has failed so that you get rough stalling at idle. This relay is gray and found behind the glove box








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Engine stalls 700 1990

uid 18083's pic
posted by  lucid on  Wed Jul 30 08:02 CST 2008
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last visit: Fri Oct 24 12:31 CST 2014
[RELATED]

If this is a Regina FI car running the original fuel pump, it could be on it's way out. A fuel pressure test at the fuel rail schrader valve should show about 36psi at idle, and 45psi with regulator vacuum hose removed and capped off.








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Engine stalls 700 1990

posted by  KP1 on  Wed Jul 30 15:22 CST 2008
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last visit: Wed Jul 30 15:20 CST 2008
[RELATED]

Fuel pump is brand new and functioning properly. I'm looking at replacement of all vacuum lines. Thanks, KP








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Engine stalls 700 1990

posted by  david hunter on  Wed Jul 30 06:20 CST 2008
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last visit: Mon Jun 30 22:10 CST 2014
[RELATED]

Check engine light on? Is there a fault code?
--
David Hunter








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Engine stalls 700 1990

posted by  KP1 on  Wed Jul 30 15:22 CST 2008
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last visit: Wed Jul 30 15:20 CST 2008
[RELATED]

Negative.








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Engine stalls 700 1990

posted by  B.B. on  Wed Jul 30 04:46 CST 2008
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last visit: Mon Oct 6 13:15 CST 2014
[RELATED]

When did it have it's last tuneup?
Common tuneup items could be at fault. Plugs, air filter, fuel filter,
vacuum leaks, etc.








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Engine stalls 700 1990

posted by  KP1 on  Wed Jul 30 15:23 CST 2008
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last visit: Wed Jul 30 15:20 CST 2008
[RELATED]

Vac leak sounds like the most probable cause. Thanx, KP







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