Nate's Z28 Project

[nascarnate326]

Any update on the no-start issue?

Havnt even touched it. Discouraged and had to do some work to Courtney's car before I could justify putting time into my toy car.

Maybe next weekend.

[JoeliusZ28]

I understand... i havent had time for mine either.

[98blackbeauty]

To bad I sold my old opti it would have been an easy test for bad opti.

Anyone have an old opti that works, sometime, maybe!

[JoeliusZ28]

I may have one in december if i go through with the 24x conversion

[nascarnate326]

I really hope it isnt my opti. Just seems like something came unpluged since it went from running 100% perfect at idle waiting in line, to just dead. No goofy noises or anything.

Put motor mounts on the focus, doing ball joints next weekend. Then I should be able to work on the Camaro. Also need to finish up our bathroom, Courtneys losing patience while I fix computers lol.

[nascarnate326]

Worst update ever? Took the 643 heads I got from Joel in to get disassembled and cleaned up.

Going to push the car into my dads barn and see whats going on. I do have my old opti that I could use for testing. Can the car be fired without a water pump just for a quick second?


522350_245768132216781_1975681113_n.jpg

[JoeliusZ28]

Ive driven my car for 3 miles without a functioning water pump. A few seconds should be fine

[nascarnate326]

Went out today and looked for any kind of vacuum line that had fallen off, nothing out of the ordinary.

We also used a test light plugged into the coil, when cranking we got no light. This confirms that the problem is ICM/Coil related...right?

[hoogiesngrinderz]

Went out today and looked for any kind of vacuum line that had fallen off, nothing out of the ordinary.

We also used a test light plugged into the coil, when cranking we got no light. This confirms that the problem is ICM/Coil related...right?

Correct me if I'm wrong...

A bad opti should still allow the car to get spark. The low resolution sensor tells the injectors when to fire and the high resolution is just timing control. Right? It's still a cap/rotor setup when you break down all the functions of the opti...

[nascarnate326]

I guess Im not really understanding what your saying.

I am testing the parts that are before the opti, and easiest to change. If I am not getting spark form the coil, theres no way the opti would get spark..right?

[98blackbeauty]

What Michael is saying there is part of the opti that establishes timing like the position sensor on later models. this tells pcm when to fire injectors and when to fire coil. The cap and rotor simply deliver the spark to the appropriate spark plug. So if that part is bad then you will not fire the coil. There is a trouble shooting proceedure on www.shbox.com to check the opti and coil try that see if it helps you.

[nascarnate326]

I understand what you mean now. Ill have to do all this, this weekend.

[nascarnate326]

Small update.

Got my heads back from engine shop. Everything checked out good and they are nice and clean now. I think I am going to have them install everything in the heads when the time comes.


Valves look good, plan on reusing them.



Anyone want some stock springs?


Also placed my order for the GM LT1/LT4 Hotcam kit.

Tomorrow morning we are pushing my car in the garage and testing/tearing apart.

[alone_and_insane]

[mcalus]

Glad to hear your are going to cam it I bet you're stoked!