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cranks but wont start

G

Gboy

New member
Got 99 Grand prix cranks but wont start. checked ignition spark at the ignition modules or whatever they are called. Got spark from all six wire plugs, am assuming that means crank sensor good? since getting spark. Check fuel pressure 45-50 psi when cranking. Checked compression all around 150. Replaced pcv valve and pressure sensor on top of it. Sounds like it backfires when cranking over at times. Any suggestion on what going on. checked codes not throwing anything to reader. :th_lipssealed1:
 




your plugs are wet either from coolant or fuel. also whats the compression like? what were the last 5 things done to the engine?
 
Ok found coolant in intake so replaced upper and lower intake gaskets. Do I need to replace plugs they aren't that old? Did notice some of plugs were loose. Don't know if it was from extra pressure in cylinders when motor was still running and trying to hydrolock. Still can't get it to start. Everything else looks good. Haven't checked timing yet.
 


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