STALLING WHEN STOPPING AT LIGHT

1989 Ford F-150

Tiny

Steve Mac

May, 16, 2013 AT 3:24 PM

Replaced tps, iac, map sensor runs rough at idle and stalls at lights. Has 4.9l wo ac checked all that I see. Have this truck along time and the only thing I think is a vacuum leak. No! Still has to be something electrical

FOUND 25379 RELATED QUESTIONS

Cj Stalling When Idling

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Stalling Out

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6 Answers

Tiny

ASEMaster6371

May, 16, 2013 AT 4:35 PM

Yes, vacuum leak.

Check the intake gasket very carefully. Common failure

Roy

Tiny

Steve Mac

May, 16, 2013 AT 5:07 PM

Not at intake, checked that 3time seems to be getting too much vacuum at vacuum connector on the upper intake port where the map sensor is pluged in

Tiny

Steve Mac

May, 16, 2013 AT 5:10 PM

There is a vacuum valve by the fuel pressure regulator 2port electric come from charcoal can splits and goes to both sides of throttle body by iac. Maybe it's bad?

Tiny

ASEMaster6371

May, 16, 2013 AT 5:12 PM

If it leaks vacuum, yes.

Roy

Tiny

Steve Mac

May, 16, 2013 AT 5:26 PM

What I think is the electric part of it is not letting the vacuum open. The way it seems to me is it works on throttle demand, all this started when my starter solenoid shorted out

Tiny

Steve Mac

May, 16, 2013 AT 5:42 PM

Anything else you come up with?

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