Running really rough. Ugh

[thestrawhead]

So, against my better judgment I let 90 Zr-1 set too long and let the gas get old. I added some fuel treatment and octane boost as I ran out what gas was in it. It seemed to run pretty well after starting it frequently, then my clutch went and it sat for about two months. Now it is back together and running awful and can't get the check engine light to go off. Any help with this would be appreciated. These are the codes from my mechanic: I got the car back together, finally got correct plenum gaskets. Ran it for quite some time. It never smoothed out and check engine light never went out. Still has code 31 for camshaft position sensor and code 36 for ignition control system. Several hours trying to find a camshaft position sensor which have been priced around $200 to $300 which is insane for a cam sensor, but they are sold out and unavailable. I found one douche that actually has one and it's priced close to $1,000. Will send pics. If it also ends up needing the ignition control module, those are about $1,300 new old stock but also hard to find.

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[thestrawhead]

I should also add that It has 23,000 miles and the injectors were replaced with stainless steal ones at 16,000 miles.

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[Young1]

The cam position sensors do fail with age. They are no longer available. Jagpanzer on this site has developed a replacement at a reasonable cost. I have had his prototype in my car for five years now. That solves code 31.
Code 36 I need to spend some time in the factory service manual. The modules rarely fail. However the pins, connectors, wiring can be easily damaged during plenum removal and reinstall leading to a code. Can any others chime in?

[WARP TEN]

While it sounds like you are capable of doing your own work, I might suggest that you consider sending the car to Marc Haibeck. He is only about 5 hours from Avon Lake and since we are coming upon winter, I assume you won't be driving a lot on the near future. The catch is whether he has the room in his schedule to take your car--he is sometimes booked well in advance. But probably worth a call to him, and in any case he might be able to offer some advice on your issues. I know that when I got my ZR-1s, they went right to him for a thorough going over and when they came back they ran perfectly. Alternatively, he has a fair amount of helpful information on his website that might offer some insights into your troubles. --Bob

[thestrawhead]

The cam position sensors do fail with age. They are no longer available. Jagpanzer on this site has developed a replacement at a reasonable cost. I have had his prototype in my car for five years now. That solves code 31.
Code 36 I need to spend some time in the factory service manual. The modules rarely fail. However the pins, connectors, wiring can be easily damaged during plenum removal and reinstall leading to a code. Can any others chime in?Thanks for the info! Much appreciated.

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[thestrawhead]

While it sounds like you are capable of doing your own work, I might suggest that you consider sending the car to Marc Haibeck. He is only about 5 hours from Avon Lake and since we are coming upon winter, I assume you won't be driving a lot on the near future. The catch is whether he has the room in his schedule to take your car--he is sometimes booked well in advance. But probably worth a call to him, and in any case he might be able to offer some advice on your issues. I know that when I got my ZR-1s, they went right to him for a thorough going over and when they came back they ran perfectly. Alternatively, he has a fair amount of helpful information on his website that might offer some insights into your troubles. --BobDoesn't sound like a bad idea. We will probably give it a go ourselves, if nothing more than to get the learning experience. But if it gets too frustrating and expensive, I may go that route. Thanks for the info!

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[Young1]

If you really want to learn and develop skills get your hands on the factory service manual. They are available on eBay reasonably. The pros use them so why shouldn?t we home garage guys? I did learn from a Haibeck cd how to properly learn to pull a plenum.

[viper107]

Injectors will stick,tap on them with a tool while it's running, cam code could be from misfires

[viper107]

Meaning, sitting for a few years, injectors will stick and misfire

[viper107]

Or a mouse chewing a wire

[Young1]

Just looked at code 36 in FSM. The aids and diagnostic tree are straight forward. All you need is a test light and voltmeter. The pair of FSM for 1990 is a reprint on eBay for $95.00. You can do it! PM me. I have an idea that may help you.