1988 - 1998 (GMT400) Section for all discussion related to the 1987-1998 Chevrolet and GMC trucks.

98k1500 No Spark after motor rebuild

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Old Apr 22, 2023 | 8:47 AM
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98K1500Rob's Avatar
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Default 98k1500 No Spark after motor rebuild

Hello I need some help please. I had motor rebuilt. Got it back in and cranks but no spark. Checked no spark at coil. I replaced coil and ignition module, crank position sensor as part of rebuild. I did the variable steering sensor delete as per gm latest so that plug is left unplugged.
I tested the pink wire on cps and read 12 volt. Purple wire did not, .4 volt.
I did notice a security light on when turning key to first position, but it doesn't stay on.

I am stumped on what to test next. Hopefully someone can steer me in right direction.

Thanks
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Old Apr 22, 2023 | 1:48 PM
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98K1500Rob's Avatar
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Originally Posted by 98K1500Rob
Hello I need some help please. I had motor rebuilt. Got it back in and cranks but no spark. Checked no spark at coil. I replaced coil and ignition module, crank position sensor as part of rebuild. I did the variable steering sensor delete as per gm latest so that plug is left unplugged.
I tested the pink wire on cps and read 12 volt. Purple wire did not, .4 volt.
I did notice a security light on when turning key to first position, but it doesn't stay on.

I am stumped on what to test next. Hopefully someone can steer me in right direction.

Thanks
I got it! So pumped. The damn cps wasn't fully seated. It runs awesome!

I still have a cps code p1345. Crank shaft position sensor camshaft position sensor correlation. Probably out of timing. Anyone' know what might cause it
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