Question about 1998 Chevrolet Blazer
1998 blazer 4.3l engine. old engine started knocking. Replaced with a 4.3 out of a 98 blazer that had been rearended. Engine is hooked up. I have a Crank but no spark condition. After futzing with it for about a month i've replaced the following Checked ECM1 15a fuse...Ok. New Computer...new Ign control Module...new distributor...new Crank positioning Sensor...new swapped coil with a known working coil. Still have a crank no spark condition. Tested coil. I got 12v on pink and no signal on the white/black stripe. Tested the icm got 12v on pink wire, ground i got continuity, and the signal wire coming from computer to the icm i got no signal. I tested continuity on wire from computer to the icm and it gave me tone. I put in new computer, still no signal to icm. Put in new crank positioning sensor still non signal from computer to icm to coil. I'm at a loss on what to check now. It ran before i swapped motors now i don't get a spark. Any ideas?
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Posted on Jan 02, 2017
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