2000 gmc sierra 4.3L 83k the truck will tun over but not start. It also backfires (up thru the throttle body intake) a small amount while trying to start. After a rough start, the truck ran fine the day before. But today it would not (fire) start. I tried replacing the crank position sensor, ignition coil and ingition control module( I think that what its called - its a small eletrical device on the side of the coil). No difference. I have 60 psi of fuel pressure. I replaced the fuel filter. And its got decent spark. The plug is wet with fuel. Also either (and gas down the intake) only makes if backfire worse. I have checked all fuses-none blown. It's acting like it's out of time, but it ran the day before? It has a mechanical type distributor that seems to be working fine- I took the cap off and it is spinning and the contacts are not pitted. Any info would help! Im stuck! : I work on diesels-not gassers.? :Wink:
have the same problem?
Monday, February 26th, 2007 AT 8:20 PM