STALLING WHEN STOPPING AT LIGHT
1989 Ford F-150 • 413 miles
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
check the intake gasket very carefully. common failure
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
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???
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
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