1986 rough running
Thread Starter
Burning Brakes
Joined: Jun 2003
Posts: 1,079
Likes: 1
From: Niagara Falls ON
1986 rough running
I have a 1986 that has some running issues. It barely runs but doesn't throw any codes. When I disconnect the MAF it runs fine except that it has difficulty starting when it is hot.
I have tested the fuel pressure on the fuel rail and it reads 40psi. If I leave it connected it will drop to about 25psi in about 1-2 minutes.
The injectors are reading the proper ohms.
Any thoughts?
I have tested the fuel pressure on the fuel rail and it reads 40psi. If I leave it connected it will drop to about 25psi in about 1-2 minutes.
The injectors are reading the proper ohms.
Any thoughts?
Corvette Enthusiast
Joined: Oct 2007
Posts: 6,794
Likes: 2,706
From: So. Cal.
2025 C7 of the Year Finalist- Unmodified
2024 C7 of the Year Finalist - Unmodified
2023 C7 of the Year Finalist - Unmodified
Fsm
I have a 1986 that has some running issues. It barely runs but doesn't throw any codes. When I disconnect the MAF it runs fine except that it has difficulty starting when it is hot.
I have tested the fuel pressure on the fuel rail and it reads 40psi. If I leave it connected it will drop to about 25psi in about 1-2 minutes.
The injectors are reading the proper ohms.
Any thoughts?
I have tested the fuel pressure on the fuel rail and it reads 40psi. If I leave it connected it will drop to about 25psi in about 1-2 minutes.
The injectors are reading the proper ohms.
Any thoughts?
if its a maf issue. I have had maf issues with out codes before. Sometimes, when you dis connect maf and it runs better is also a indication its a maf issue. JMO.........................
Le Mans Master
Joined: Sep 2006
Posts: 6,050
Likes: 147
From: Phoenix AZ
2021 C4 of the Year - Modified Finalist
perform the time honored tap test. put it in, start the car, tap it with the handle of a screwdriver. If it falters or runs better, it's the circuit board inside. could be a poor solder joint, or a component
