Running really rough. Ugh - ZR-1 Net Registry Forums

thestrawhead · 10-19-2022

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 · 10-19-2022

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 · 10-19-2022

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 · 10-20-2022

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 · 10-20-2022

Quote:

Originally Posted by 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?

Thanks for the info! Much appreciated.

Sent from my SM-G960U using ZR-1 Net Registry mobile app

thestrawhead · 10-20-2022

Quote:

Originally Posted by 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

Doesn'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!

Sent from my SM-G960U using ZR-1 Net Registry mobile app

Young1 · 10-21-2022

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 · 10-21-2022

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

viper107 · 10-21-2022

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

viper107 · 10-21-2022

Or a mouse chewing a wire

10-19-2022	#1
thestrawhead Join Date: Oct 2022 Location: Avon Lake, Ohio Posts: 9	Running really rough. Ugh 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. Sent from my SM-G960U using ZR-1 Net Registry mobile app

10-19-2022	#2
thestrawhead Join Date: Oct 2022 Location: Avon Lake, Ohio Posts: 9	Re: Running really rough. Ugh I should also add that It has 23,000 miles and the injectors were replaced with stainless steal ones at 16,000 miles. Sent from my SM-G960U using ZR-1 Net Registry mobile app

10-19-2022	#3
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 894	Re: Running really rough. Ugh 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? __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.

10-20-2022	#4
WARP TEN Join Date: Apr 2007 Location: Lake Bluff, IL Posts: 2,127	Re: Running really rough. Ugh 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 __________________ 2016 Long Beach Red Z06 #10281 "POPS Z" 1995 Polo Green #409 "WARP TEN"--Haibeck 350/510 package, 4.10s, Hurst, Stock Exhaust with QTP Cutouts --Sold but still running strong 1993 Quasar Blue #161 "HIL KING" --Sold but still running strong, now with more than 120,000 miles 1967 Marlboro Maroon/Saddle Corvette Coupe 300 hp/4-spd --Sold a long time ago ZR-1 Net Registry Founding Member #95 NCM Lifetime Member Favorite Quote--Attributed to Mickey Thompson: "Too Much Horsepower is Almost Enough"

10-21-2022	#7
Young1 Join Date: Sep 2016 Location: Ocala, FL Posts: 894	Re: Running really rough. Ugh 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. __________________ Steve Young 1991 ZR-1 Quasar Blue Metallic/Black #729 Second Owner 1991 ZR-1 Dark Red Metallic/Black #2040 SOLD 1990 ZR-1 Dark Red Metallic/Saddle #1670 SOLD Double your happiness.....complain half as much.

10-21-2022	#8
viper107 Join Date: Dec 2019 Location: st louis mo Posts: 738	Re: Running really rough. Ugh Injectors will stick,tap on them with a tool while it's running, cam code could be from misfires __________________ 95 admiral blue z(sold)/ / 93 ruby z(sold) 91 steel blue z/95 aqua z haibeck 510, 91 callaway 415 areobody #5

10-21-2022	#9
viper107 Join Date: Dec 2019 Location: st louis mo Posts: 738	Re: Running really rough. Ugh Meaning, sitting for a few years, injectors will stick and misfire __________________ 95 admiral blue z(sold)/ / 93 ruby z(sold) 91 steel blue z/95 aqua z haibeck 510, 91 callaway 415 areobody #5

10-21-2022	#10
viper107 Join Date: Dec 2019 Location: st louis mo Posts: 738	Re: Running really rough. Ugh Or a mouse chewing a wire __________________ 95 admiral blue z(sold)/ / 93 ruby z(sold) 91 steel blue z/95 aqua z haibeck 510, 91 callaway 415 areobody #5

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