As the title states I have spark, fuel and no code but no start. Any input would be great I'm thinking maybe fuel presure reg.

 

How are you verifying each constituent? What is your fuel pressure?

 

42 psi on the rail and I pulled the # plug and wire to chech spark and used a snap on scanner and no codes. The only thing I can think of is fuel presue reg.? Anyone?

 

Did this just happen all of a sudden or did you change something? Ive heard of guys changing teh opti before and not getting the splines correct, so spark is coming at the wrong time. You could try using a noid light to see of the injectors are getting signal.

 

I ran it low on gas and then it wouldnt star. I thought maybe the fuel pump burned up but not the case.

 

Have you checked your ignition module? Mine threw a crank sensor code and then it would sometimes send spark but would not start. Check your ignition module and see if its with in specs or if you have a spare one try it out. Keep us posted ..

 

Thanks WARDOG I had that in the back of my head I'll try it I have a spare but the only problem is I sent out my fuel rails to speed inc today. I should maybe have them back in a week or so and I'll give it a try.

 

Had a similar instance last year new opti and module still getting crank and good fuel pressure and no start. Turned out to be the ignition swith on the steering column that burnt up. This is a very common problem on LT1s from what ive seen and dealt with. Go look shbox.com if you need pics or views of what it looks like. Part cost like 40 bucks or something and you clean up the other part of the connector and your off to the races and you will notice it will start alot easier.

Could be the issue but you wont know untill you pull it to see if its burnt.

 

Ok cool keep us updated.