Help! 86 302 EFI won't start
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Help! 86 302 EFI won't start
My grandpa has an 86 E-150 with a 302 efi in it that refuses to start unless he feeds it with a little gas or starting fluid. Once it is started; however, it runs fine with no smoking or misfiring. He has already replaced the computer, the ignition, the main fuel pump (not the one in the tank) the ignition switch, egr valve, fuel filter, fuel pressure regulator, and fuel pump relay. He says he has verified that the map sensor is good and that there is power to the fuel injectors. The only thing that he said is wrong is that sometimes while idling at about 700 RPM or so the engine will somtimes automatically rev up to 2000 RPM and then drop again. This to me almost sounds like a vacuum issue, but I can't be sure. He also says that there is no vacuum to the line running to the EGR, idling or under throttle. Also, he says that the fuel pressure is 35psi when the engine is off and 30psi when it is running. What is the normal pressure for one of these engines? Any ideas??
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Joined: Nov 2007
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I had one in a taurus and after it staying at the dealer for a month it was the crankcase position sensor when you shut it down if it wasnt just right it wouldnt start ,may be something you would want to check .does it shut down on its own?
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From: Easton,Ks
Fuel pressure should be 42-45psi not running, 32-34psi idling and around 42psi WOT.
You might also want to check the timing and the start wire to the ignition system.
I would also check for codes, as the IDM should give a code if the start wire is open/shorted.
No vacuum to the EGR is normal with the truck standing still. You would also want the EGR valve closed to start the engine (no vacuum).
You might also want to check the timing and the start wire to the ignition system.
I would also check for codes, as the IDM should give a code if the start wire is open/shorted.
No vacuum to the EGR is normal with the truck standing still. You would also want the EGR valve closed to start the engine (no vacuum).
