driving down the freeway, got into it a little bit and it just shut off. got it towed home and it has no spark. the previous owner put an msd digital 6al in it with an msd coil. naturally he hacked it. I tried another coil and module. I did the test with the msd box jumping out the purple and green wire and it sparked when I grounded a screwdriver off the coil wire. the coil isn't the plug and play msd ones it has 2 studs. the factory harness is cut and butt connected together. so it seems the msd box is giving a spark, coil and module were switched with no luck, ecm fuses are good. is there a way to bypass the msd box to rule that out with that coil in there? or do I need to get the correct coil and screw with the cut wires? thanks
ty is dead need help!
- Thread starter Ls10
- Start date
dgoodhue
BuSTeD 4.3
Re: ty is dead need help!
It is too bad that the former owner didn't just buy the $15 harness so the MSD could plugged in or bypassed in this case.
The ignition module sometime goes in these truck which causes a sudden no spark condition if it fails.
It is too bad that the former owner didn't just buy the $15 harness so the MSD could plugged in or bypassed in this case.
The ignition module sometime goes in these truck which causes a sudden no spark condition if it fails.
Re: ty is dead need help!
I have a brand new gm module in the box that I tried. The previous hacked so much stuff that I had to fix. I will be replacing the harness and coil with the correct one and getting the msd jumper to avoid this situation again. Im pretty sure the msd box crapped out even though it's putting our a test spark. Does anyone have a pic or diagram of the coil wires? I have no idea what goes where. I can get an autozone coil and try it for now. Then drive it a few more weeks till I do the build this winter
I have a brand new gm module in the box that I tried. The previous hacked so much stuff that I had to fix. I will be replacing the harness and coil with the correct one and getting the msd jumper to avoid this situation again. Im pretty sure the msd box crapped out even though it's putting our a test spark. Does anyone have a pic or diagram of the coil wires? I have no idea what goes where. I can get an autozone coil and try it for now. Then drive it a few more weeks till I do the build this winter
IGottaSy
Active member
Re: ty is dead need help!
http://www.syty.net/forums/showthread.php?t=77461&highlight=Wiring+diagram
http://www.syty.net/forums/showthread.php?t=77461&highlight=Wiring+diagram
Re: ty is dead need help!
so I went to the junkyard for the hell of it.......and there was a 92 blazer 4.3 there!!!!! I grabbed the coil and harness out of it. came home put the harness back to stock and stock coil.......still no spark. im thinking the distributor went bad. off to the parts store I go!!
so I went to the junkyard for the hell of it.......and there was a 92 blazer 4.3 there!!!!! I grabbed the coil and harness out of it. came home put the harness back to stock and stock coil.......still no spark. im thinking the distributor went bad. off to the parts store I go!!
