Is there a way to check timing?
 

Heres the deal. I put an LT1 in my car (87 IROC) and I cant get the thing to run right. It ran fine before being pulled from it's donor, and while I hade it out, I replaced the OPTI and plugs wires, water pump, the usual stuff. But it seems now that my timing is way off. The car cranks starts and runs like crap for a few seconds, and then sputters to it's death. I have checked the firing order at least 5 times, it's all correct. I have checked my wiring and it appears to be right. I have tried to find any possible grounds that may not be grounded but I think I have them all(how many are there btw). I'm very desperate for answers, I miss my car alot! Please help in anyway you can. Thank you.

Re: Is there a way to check timing?
 

if its an early style opti, its pretty easy to put on wrong and not really know it. If its a later style, its a lot harder. but eather way, thats probably your problem. I installed an opti wrong once a while back and it had the exact same symptoms.

Re: Is there a way to check timing?
 

How is it installed right then? What did you do wrong when you put it in? It's a 94 btw.

Re: Is there a way to check timing?
 

Install like this.

Re: Is there a way to check timing?
 

Yeah, that's what I thought. All of them are keyed and would be close to impossible to install it wrong.

Re: Is there a way to check timing?
 

That's what everyone thinks...... WRONG. It is very easy to assemble both style Opti's incorrectly. I'd say it happens in at least 10% of the installs.

Re: Is there a way to check timing?
 

its 95-97 that have the dowel pin from the cam into the opti ya?

Re: Is there a way to check timing?
 

Have you verified other contributors like fuel pressure, hot spark, fouled plugs, etc?

Re: Is there a way to check timing?
 

Indeed. I check fuel pressure, it is a constant 40 psi, the plugs are new. I am getting spart to all of my plugs, it just seems as if the timing is off.

Re: Is there a way to check timing?
 

what year motor is it? did you use the factory wiring harness?

Re: Is there a way to check timing?
 

It's out of a 94 Z28, and yes I used the factory 94 harness. I bought the Opti Unit from O'rielly's and I bought the MSD cap and rotor.

Re: Is there a way to check timing?
 

you are using a mass air flow sensor correct?

what did you hook the computer power wire to? make sure its getting power all the time when the ignition is on.

Re: Is there a way to check timing?
 

There are two power wires going to the ECM and both are hot in start and run. Yeah, I also purchased a new MAF from O'rielly's. Everything is hooke up right as far as I know, but if you guys have any suggestions, Im open to them all.

Re: Is there a way to check timing?
 

check the opti again, what do you have to lose? its easier than you would think to screw it up.

Re: Is there a way to check timing?
 

CHECK YOUR COMPUTER!

you may need to reflash it, I had this same problem about a year ago...

the computer had kicked the bucket on mine

car would start, run for a few seconds, then sputter out and die

possibly shorted it out during engine swap