I have rebuilt my 4.3l engine I have changed the Ignition coil, distributor, spark plug wires, spark plugs, ignition control module. I am not getting any spark at all. I have to use a jumper wire from the positive battery post to the ECM 1 fuse and the under the hood fuse box to get it to start. It turns over fine. When I use the jumper wire to the ECM 1 fuse it starts up but as soon as it starts it jumps to very high rpm's as if someone is holding the gas pedal to the floor but we are not touching the throttle at all. We have also replaced the idle air control valve and the throttle position sensor. Need major help please.
have the same problem?
Monday, June 6th, 2016 AT 8:17 PM