changed 5.7 and now it wont start,,,NO spark.Put a new CPS in and nothing..PLEASE help

1998 GMC SIERRA
136,000 MILES
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GREAT1760
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did an engine swap with the 5.7 and after I got it all together,it didnt want to start.I shecked the timming and for sparp,found that I didnt have any spark so I changed the CPS.....still dont start...PLEASE help
Apr 22, 2012 at 8:58 PM
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RASMATAZ
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The computer could be your problem due to different engine-check into it-
Apr 22, 2012 at 9:05 PM
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GREAT1760
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thanks....how do I check that?
Apr 22, 2012 at 9:13 PM
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RASMATAZ
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I meant computer compatibility-BTW what make you swap engines? Have you tested the CPS wiring for short and open circuit-
Apr 23, 2012 at 12:28 AM
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WRENCHTECH
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  • 20,760 POSTS
If you disturbed the distributor, you likely have it out of synch since it requires a scan tool to set it. That will be in addition to whatever your "no spark" problem turns out to be.I'm assuming you swapped wit the same year and VIN code.
Apr 23, 2012 at 3:20 AM
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