Saturday, November 20, 2010

1991 truck unable to run?

I have a 1991 Chevy Silverado 4 wheel drive.truck died unable to start, changed tbi,computer,distributor,map sensor,egr valve, starts up now but running really rich,and rough. doesn't idle and pops.smell of gas is everywhere and is just swollowing the fuel.Check engine light is on unable to clear. Don't know what to do. Heard that computer codes needs to be cleared How???? Please help and advise. ready to burn the truck.

dale.cordeiro@yahoo.com1991 truck unable to run?
Okay, you may need to give the truck into repairs. Fixing it by yourself may make it worse :(1991 truck unable to run?
sounds like your truck might of jumped time ,or you got some sour fuel in tank.to clear code ,pull ecm fuse or disconect battery cable for a few minutes
sounds like you have a clogged fuel filter or fuel pump is wearing out and not enough pressure. the gas is just running out of the injectors not spraying out as it should. always try the cheaper parts instead of going to the more expensive parts first. fuel filter is anywhere from 5 to 12 bux. alot of the times its these cheaper parts that will cause a system to fail.



also to reset the comp. you need to turn the key into the ';on'; position and firmly tap the brakes three times.

do this three times and it should clear it.
You can clear the codes by simply unhooking the battery cable for about 15 seconds up until 1995. But if you have a serious problem the code will just come right back. Check the vacuum port coming off the back of the throttle body going to the map sensor. The metal tube in the TBI is bad to clog up restricting vacuum to the map sensor and will cause severe rich burn problems. It should have manifold vacuum at idle.
custom 10 is right on how to clear the codes. i would say the computer is receiving the wrong signal and dumping too much gas into it. what codes show up?, it might be the 02 sensor giving the wrong signal back to the computer.
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