Also i put injectors on it
So its not the injectors, wires/plugs, fuel pump

 

If you have an O2 sensor reading lean, you might have an exhaust leak on that header. It could be sucking in oxygen which would cause the O2 to read lean and tell the computer to compensate by adding more fuel. Not sure what the Hi Res fail is. EGR fault is probably your EGR valve.

 

New O2 sensors
Still a problem
It ran 10's on a 1/8th mile
and it has a 3.73 gear

 

Do you have any exhaust leaks??? Narrow this problem down. Maybe your opti is bad? So many things could be the problem

 

No exhaust leaks
i have a cutout but its on right now and hasent helped the problems

 

I'm going to suggest what someone already posted above....

List the specifics of your car, all in one place. List every mod that has been done to it.

Describe in detail the problems.

Describe in detail all the things you have already done to locate and cure the problem.

It seems like you don't want to give up the info. Someone says maybe its the O2 sensors, and you respond you've replaced them. Tell us what you've done, so we can rule out those possibilities, and try and help you. So far, getting info about your car is like pulling teeth. ?????

The "high res" code means there's a problem with the OptiSpark. One of the pulse patterns from the optical sensor is faulty. Could be a failed Opti sensor, could be a corroded or damaged harness connector at the Opti. Have the code cleared, and see how fast it comes back. That will tell you if is a constant problem, or an intermittent one. Loss of high res pulse should NOT cause major impact on performance.

The "EGR fault"..... which one? There's one code for the EGR vacuum solenoid, and one for the EGR valve. Which one do you have? Why are you asking about deleting the EGR system? Deleting it will GUARANTEE you have the codes. Check the EGR valve and make sure its not leaking. If it is, it can kill performance and cause the engine to run rough and rich. If its operating correctly, it should have no impact at all on performance.

The lean O2 sensor means the O2 sensor THINKS its running lean. Might be a faulty sensor (replace sensor as you have already done) or it might be a "false lean" - exhaust leak before the O2 sensor, misfires - or it might be a "true" lean. but the fact that the dealer told you his scan says its running rich would point in the direction of a "false" lean condition. The scan should also have been able to tell you if this problem is affecting one or both banks of the engine, which might provide a bit of guidance in solving the problem.

But again, give us ALL the info up front so we can help you. I saw your original post, and didn't even try to respond, because you didn't include any info about your car, how you knew cylinders were not firing, etc. The more you tell us, the more we can help.

 

I replaced plugs, wires,O2 sensors, fuel filter, injectors,and i have 40 lbs. of fuel pressure at idle. GM said that it was running rich and then they said it had a dead cylinder, and that was the reason it was running rich. I does have a horrible miss or anything, just weak as hell. When cold it starts fine. Then if its warmed up it starts fine but if shut off for a while after its warm you have to crank it for a while.

 

Hows that
Now any ideas

 

My best guess would be that the opti is prolly bad, make sure ur waterpump isnt going crazy and leaking all over the opti, with ur car running rich make sure the o2 sensors on the bank of which its havin a problem, possibly somethin wrong with the cat if the sensor that is faulty or throwin a code is after the cat. I would get the egr and air deleted asap. Did GM tell u any soluttions on how they would go about solvin it?

 

My block was a police block and they put the aluminun heads off another LT1 and said it had a miss after that. My opti was replaced. I thinking that the intake gasket might be tore up from the swap and that would allow it to suck in air

 

You said you replaced the injectors. Are the injectors the same size of the original injectors? What brand are they? Did you reprogram the computer for bigger injecors if they are indeed bigger injectors?
Check all the terminals on the opti to see if there is any corrosion and to make sure all the wires are going to the proper cylinder.

 

No such thing as a "police block". Are you saying your car is a B4C?

Somehow I'm getting the feeling that not of this is "real".

 

I'm guessing the engine was replaced with an LT1 from a 9C1 Caprice with the original Camaro heads re-installed....

 

Yes 1996LT1NY is correct. I need to get the problem fixed.

 

You've had 5 months since your last post. What have you tried, among the info contained in the responses above? Have you done anything about the code for the missing high res pulse for the Opti? Have you looked for exhaust leaks to see if that's what's causing the O2 sensor to read lean? Have you corrected the "EGR fault"? Which fault was it.... EGR flow or EGR solenoid cricuit? What have you done about the possible "tore up" intake manifold gasket? What size injectors are you running?

And I'll repeat what I said before.... no one is going to be able to help you if you can only communicate in single sentences no longer than about 6 words. And no one is going to help you if you don't respond to their suggestions, or give some indication that you've checked the things they've mentioned.