1999 Chevy Suburban Engine wont start

1999 CHEVROLET SUBURBAN
170,000 MILES • V8 • 4WD • AUTOMATIC
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AZGSXRGUY
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Ok so I have a 99 suburban It had a cracked head and some gaskets leaking so I replaced the engine w/ a new one from chevy. Now it wont start I have timed it 100 times, replaced the cam and crank sensors, checked for spark on every wire, checked that there is signal going to the injectors, brand new plugs, and tried a new coil. I am fishing for any ideas that might help me figure out why it wont start.
Feb 25, 2010 at 11:27 AM
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TOOOMANYTOYS
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  • 513 POSTS
So your not getting spark? Check all the grounds there is one that goes from the back of the head to the firewall. This ground sometimes get over looked and can cause a no spark condition. If that does work tryusing a jumper ground from battery. Put it in different locations to see if it starts.
Oct 4, 2019 at 3:44 PM
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DOCFIXIT
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Was it a crate engine? ie. complete. Is there fuel pressure? spark at plugs? Have you checked compression?
Oct 4, 2019 at 3:44 PM
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AZGSXRGUY
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Oh yeah there is fuel pressure we also replaced the fuel pump cause there was no residual fuel pressure. and yes it was a complete crate motorand there is spark.Just checked there is compression on all cylinders.
Oct 4, 2019 at 3:45 PM
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DOCFIXIT
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You got spark.compression all you need is fuel with test light on Pink wire may look white crank does light flash?
Oct 4, 2019 at 3:45 PM
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