SC/TA

I just installed a new cam and heads. Now the car will not start. It seems like the timeing is out, but I really think I have the opti in right. the car cranks fast then real slow but it will not fire. any ideas

Javier97Z28

Really could use some more info.

What year LT1, what setup, what timing chain.. etc

Rockers on too tight?

SC/TA

the car is a 95 lt1 stock bottom end. the timing chain was oem replacement. the cam is 224/234 and the heads are trickflow.

silverlt1ss

rocker arms to tight??? usally when it cranks fast the rocker arms are to tight and there keeping the valves open

Javier97Z28

Yah, I'm gonna go with rocker arms too tight. Start over on your lash.

SC/TA

Thanks guys, I will try the valves. this is my 1st cam swap on the lt1 engine. I have done several on other sbc but not the lt1. I was worried about the opti.

Javier97Z28

As far as the opti goes, as long as it sat in flush with the timing cover (ie, you didn't try to force it flush w/ the bolts), you should be OK.

The dowel pin can't go into the other slots on the opti unless you beat it on with a 2x4.

SC/TA

Thats what i thought about the opti. It went in smooth and flush. maybe its the valves. by the way, Javier you have a great website

SC/TA

I adjusted the valves again, still no start. any other ideas

SC/TA

I am also getting a code 21. I dont know if that would cause it not to start though.

SC/TA

I MAY have found the problem, the clip that holds the wiring harness to the opti is broken off. Maybe its not making a good connecton. What do you guys think? I went ahead and ordered a new one, but its going to take about a week to get it. So I wont be able to even see if thats the problem untill I get it.

SC/TA

Any opinions on this being my problem?

Cmr0z28

I haven't seen an opti harness that ISN'T cracked...mine is pretty much destroyed and Javier's is cracked too. I ordered one last Monday and it still hasn't arrived!

It's definitely a possibility...

Z95m6

call me crazy but i think you're going to end up spending a lot of money real quick if you get that thing runnning. A stock timing chain, with a heads, cam and SC motor is just a deathwish.

TransAm396

its not "technically" a deathwish..I know PLEANTY of people who run with a stock chain with no problems (myself included)