Question about Cars & Trucks
Sure its the key switch-may be the ignition switch on steering colum--or othr things like a module etc--40 and 50yrs ago it was easy to play with wiring but today becareful-cud burn computer--get a mobile mech with experience
Posted on Dec 13, 2012
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Posted on Jan 02, 2017
I had the same exact problem with my 1998 Explorer and it was the Idle Air Control. You can try to remove and clean it but it won't last very long. I replaced it myself in 5 minutes and an expense of $80. Hope this helps.
Posted on May 06, 2009
i got a 1994 f150 that starts but cuts right back off so i had no fuel psi so i put a new fuel pump and fillter then found out that it was not getting power to the pump the cut off is not triped and no brakes in the wires can anyone help??
Posted on Sep 10, 2009
You are jumping to conclusions. Slow down.
No spark AND no injector pulse indicates none of the desired outputs were triggered. The ignition module makes spark when it receives a crankshaft position sensor signal, and then transfers control of that spark to the computer after it starts. The module takes its crank sensor signal and generates an RPM count that it forwards to the PCM(main computer) which is used for triggering the injectors and controlling timing. SO, if you had a bad crank sensor OR a bad ignition module, you could lose both spark AND fuel. a coil would not disable injector pulse. modules RARELY fail in a manner that disables RPM reference to the computer causing it to not fire the injectors...At this point, I would TEST the crank sensor as the next step. If its easier, 1 of the wires on the module goes directly there so you can test the crank sensor at the module.
Posted on Sep 18, 2009
Testimonial: "great info, thanks!"
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