Cranks But Won't Start. Here Is The Situation. Fresh Rebiuld On A 95 Lt1. I Have A New Icm And Opti. Pretty Sure The Timing Is Good. I Have Fuel Pressure To The Fuel Pressure Reg. But Not Sure If I Do After The Reg. It Won't Even Start If I Use Carb Choke. It Cranks And Tries To Start For A Second But Then Goes Back To Cranking. The Cranking Will Slow Down And Speed Up Though. What Do I Check Next? The Three Main Grounds Seem To Be Good. Can I Ground The Pcm Strait To The Neg. Term. On The Batt.
BEFORE I REPLACED THE ICM AND OPTI IT NEVER TRIED TO START.
Thanks

 

When you installed the new opti........did the cam dowl pin go in the correct slot in the opti drive?

 

Yeah I Think It Did But It Is Really Hard To Make Sure. Should The Opti Be Completely Flush With The Timing Cover Before The Bolts Are Tightened.

 

Yes....it should be flush.

 

I Put The Opti In Right And Now It Works! Thanks For The Help.

 

No prob man.....glad I can help.