90 ZR1 Randomly Dies - ZR-1 Net Registry Forums

fastpace · 02-11-2023

Did a bit of searching but wasn't seeing anything quite following my symptoms (many related to dieing at idle, cold or warm, or running rough).

Have a 1990, last drove it maybe 4 weeks ago and went to take it out today. Started right up like normal, pulled it out and left it idling while moving stuff around. Got back in the car and then it died at idle (hadn't fully warmed up yet), thought it was weird but it started right back up and ran smooth. Pulled out got a couple miles down the road and died again. Some cranking, then started again. Died about 6 times in a 2 miles loop getting it back home, each time happening after a shorter run time.

When running it runs very smooth, not noticeable issues. When it dies, the tach stays right around where it was, if you push gas it does/goes no where, and once you let off it dies and drops to 0. It doesn't fire right off, sometimes takes some cranking.

About 1500 miles ago I replaced to single fuel pump, new injectors, new spark plugs, and replaced some vacuum lines. Since then it's always run great. I will assume all other parts are original to the car.

Any common issues or quick things to check?
I'm thinking cam or crank sensor. Is there an ignition module? Any help is appreciated.

02-11-2023	#1
fastpace Join Date: Mar 2022 Location: Houston, TX Posts: 39	90 ZR1 Randomly Dies Did a bit of searching but wasn't seeing anything quite following my symptoms (many related to dieing at idle, cold or warm, or running rough). Have a 1990, last drove it maybe 4 weeks ago and went to take it out today. Started right up like normal, pulled it out and left it idling while moving stuff around. Got back in the car and then it died at idle (hadn't fully warmed up yet), thought it was weird but it started right back up and ran smooth. Pulled out got a couple miles down the road and died again. Some cranking, then started again. Died about 6 times in a 2 miles loop getting it back home, each time happening after a shorter run time. When running it runs very smooth, not noticeable issues. When it dies, the tach stays right around where it was, if you push gas it does/goes no where, and once you let off it dies and drops to 0. It doesn't fire right off, sometimes takes some cranking. About 1500 miles ago I replaced to single fuel pump, new injectors, new spark plugs, and replaced some vacuum lines. Since then it's always run great. I will assume all other parts are original to the car. Any common issues or quick things to check? I'm thinking cam or crank sensor. Is there an ignition module? Any help is appreciated.