New 6 bolt installed, revs to 3500 ish then dies

[wadebyers]

Hey all, still stuck here in the noob forum Well here is my situation, I recently put a 6 bolt into my 1g (orig 7bolt), motor has comp cams (unsure of lift, currently looking up the numbers so should know by the time anyone replies) and 2g pistons. I dont have link and everything else is stock, minus a 2.5 exhaust. I have not had a chance to mess with the timing yet and I think that may be part of my problem, just want everyone's opinions. It will run if I feather the gas to keep it going but if I give it to much it revs to roughly 3500. When I first start it it will rev to 3500 ish then fall and die. Thanks in advance!

 

[92AWDHX40]

Check the compression.

 

[hotrodssnova]

Also check your idle position sensor. It has one wire going to it and is on the firewall side of the throttle body. This wire tends to break easily or come loose.

 

[mootink]

is it in 1g or 2g car?

 

[92AWDHX40]

Do you have fuel pressure, any cels, hows the maf?

 

[wadebyers]

No CELS maf was in working order right before timing belt blew. Going to attempt to make a boost leak tester tonight, and install new injector o rings. I assume I have fuel pressure as it smells almost rich and will rev up if i give it gas.

 

[hotrodssnova]

Usually a lean mixture will rev the engine on a cold start. Did you mess with any of the piping or intake track of the engine when you did the timing belt?

 

[renovatdkitchen]

Boost leak test for sure. Mine did the same when I had a big boost leak between the head and intake manifold.

Are you using the 1g intake manifold and gasket?

 

[Seamus]

Could be coolant sensor/wiring/connecter.

 

[werx]

I second the boost leak test. That's the first thing i would do before trying to go any further with diagnosing what's wrong.

 

[amiturbo]

Do you have fuel pressure, any cels, hows the maf?

Usually a lean mixture will rev the engine on a cold start. Did you mess with any of the piping or intake track of the engine when you did the timing belt?

does it have an aftermarket fuel pressure regulator?? check the fuel pressure. that what your issue is sounding like.