We replaced plugs and wires in my 2000 Buick LeSabre and middle Ignition Coil (for plug 2 and 5). when we started it back up plug 2 and 5 where not firing and was told to reset computer by disconnecting Battery. when reconnected we had no power at all. replaced the battery as it tested bad (7 years old in the desert)new battery in still no electrical power except to the radio.
When you turn the key on the instrument cluster has no lights come on ? The head lamps don't work ? plug 2 and 5 where not firing and was told to reset computer by disconnecting Battery.If 2 & 5 are the only ones not firing ,disconnecting the battery isn't going to change that . The ignition module has burnt out transistor . If there was B+ voltage before you disconnected the battery you have a bad connection . Check your connections , cables ! Unless you shorted something . Do you know how to do automotive electrical testing using a voltmeter and a electrical power distribution diagrams ? This video on diagnosing coil drivers ( transistors ) is on a saturn 2.2 4 cylinder , doesn't matter testing the transistor is the same for your vehicle .
2004 Saturn Ion 2 2 Misfire Case Study P0300 you look at some other ones . Here watch this one too .
GM Ignition System diagnosis 1988 Olds Cutlass
Voltage Drop Test
All these suggestions were tried it ended up being the Ignition Coil Modulator it was corroded. This solved the issue of plugs 2 and 5 not firing. the misfire for cylinder 6 was a dirty injector solved by using a system additive in the gas. And finally the power issue turned out to be a dead battery. Batteries only last about three years in high heat and mine was 7 years old. Also had to change positive cable going to the battery as it was corroded 2 inches into the cable. Thanks for all your help everyone.
×
Did you hook up both positive cables and is the spacer in the positive cables assembly at the battery
212 views
Usually answered in minutes!
×