black96camar

I have a 96 z28 6 speed, hasn't ran since november. Has 155000 miles. I finally have a place to work on it, would like to know what to check. Before it went out it would some times idle at around 2200 rpms and higher at stop lights. I have check fuel pressure have 44 psi and it stays there. Has new ac Delco opti, new coil pack. New water pump the old one leaked onto the msd opti. New plugs and plug wires. New battery the old one wouldn't hold a charge. Probably going to have to replace the starter, it barely spins the motor over and that's on a fully charged battery. Any advise would be great.

Injuneer

Are you saying that after installing all those new parts, it still will not start? If so, describe what happens when you turn the key to "start". Does the starter engage, does it crank the engine, does the engine show any signs of firing - popping, sputtering, or nothing.

What happened when "it went out"? Do you mean it just stopped running? Did you scan it for codes at the time?

Have you checked for spark at the coil? .... at several individual plugs? Are you sure the Opti was indexed correctly when installed? Have you checked to be sure the Opti signals are getting to the PCM?

4th Gen LT1 F-body Tech Articles

Is this post really a continuation of this thread:

https://www.camaroz28.com/forums/lt1...k-fuel-883682/

And finally, let's move this from "Wheels and Tires" to "LT1 Based Engine Tech".

black96camar

It was running great then I went around a curve in second gear, and when went to shift down in to second jus started missing on all cylinders. It wouldn't move at all, and after replacing the opti it swouldnt start so I took the opti off and made sure was in the notch, and really checked all the plug wires still didn't start, it cranks over but really slow I checked the battery and it had 13 2 volts it been sitting on a battery maintner. But after like 4 cracks of the motor it starts smoking from the passenger side from the starter. And I have checked the spark at the coil it has spark, know it has fuel pressure,

Injuneer

If your starter is pulling excessive amps, and sucking the battery volts down, it can affect the fuel injectors. After my stroker build the stock starter seemed lethargic, and took increased number of cranks to start. I though must be the extra load from the increased displacement and higher compression ratio. Shop told me I was wrong, they measured the torque it took to turn the engine, and it was less than the stock engine.

Replaced the starter with a CVR high torque starter, and all the problems went away. The 74# injectors just weren't happy with the low voltage resulting from a dying stock starter. The CVR also offers the ability to rotate the starter relative to the engine, to allow getting it away from the heat of the headers, which seems to destroy the stock units.

black96camar

We're can I find that starter, eventually I'm looking to build the motor after summer.

black96camar

Tested the icm plug got 11 volts on A, 10 volts on D 4 volts on b and 0 on C

Injuneer

Did you use the procedure I linked? You're measuring ohms on C and AC volts on B. Is that what you did, because that is not clear in what you posted.

4th Gen LT1 F-body Tech Articles

CVR Protorque starters are available from places like Summit, and on eBay. Summit sells the same starter under their brand name. JEG's calls their branded version Prostarter.

black96camar

I followed the procedure, I got the letters mixed up. I got the right volts though. I'm try to find a place to test my icm, to do that do I take the ignition coil too or just the icm?

Injuneer

You just need the ICM. But you already stated you have spark. If you have spark at the coil, the Opti signal is reaching the PCM, and the PCM is sending the signal to the ICM, to fire the coil. You wouldn't have spark with a faulty Opti or ICM. Might be a good idea to verify spark at the plugs as well.

Did you do anything about the smoking starter/low battery volts?

black96camar

Got 13 volts at the battery and ordering a new starter on the 14th

black96camar

Was looking under my car today and the oil pan is dented. Will it cause any issues?

Injuneer

It will if it knocked the pickup off the pump. Depends where the dent is. Pickup is in the deepest part.

black96camar

The dents in the deepest part. I'd how long it's been like that. I never had oil pressure issues

black96camar

Pulled my starter out and then end piece covering the rod and gear was missing

Injuneer

The pickup screen is maybe a 1/2" from the bottom of the pan. If the pickup fell off, typical symptom would be dropping near 0 oil pressure on hard stops. If the pickup is still in place pan has reduced the clearance to the screen, you might see reduced oil pressure at max RPM when flow is high.

How deep is the dent?