Engine not running?

FOGUIE MCKINNIE

MEMBER
1992 CHEVROLET VAN
20,456 MILES

I have a 1992 chev van 20 it have gas at the injector but it wont spary I change the E. CM and check the fuse and change the distributor and the fuel pump relay but still nothing

Sunday, November 4th, 2012 AT 12:49 PM

5 Replies

JDL

MECHANIC
16,098 POSTS

Are you missing anything besides injector spray? Engine cranking, do you have spark at the plugs? Any applicable trouble codes? Use a gage and check proper fuel pressure. Did you check for voltage and ground at the injector/s? If computer doesn't see rpm signal, it won't pulse the injectors.

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Sunday, November 4th, 2012 AT 2:59 PM

FOGUIE MCKINNIE

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51 POSTS

The fuel pump psi is good 50 to 60 psi it have voltage at the injector but no ground I have spark at plugs it will start if I put gas in the t body

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Sunday, November 4th, 2012 AT 11:03 PM

JDL

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Hi, if you have tbi fuel injection that pressure is way too high. For tbi fuel injection, the fuel pressure should be around 10 psi.

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Monday, November 5th, 2012 AT 2:56 PM

EOUR60

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1 POST

I have a 1990 chevy van that did that to me and it was the oil psi sending unit. Come to find out the computer checks for oil psi for 2 milasecions before it will let gas to the injectors.

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Saturday, December 8th, 2012 AT 12:20 AM

JDL

MECHANIC
16,098 POSTS

The op switches I've seen, on gm, are just a redundant power supply to the pump. The circuit is parallel to fuel pump relay. If the fuel pump relay is functional, the op switch can't kill the vehicle.