easy ? for someone
Thread Starter
Pro
Joined: Dec 2004
Posts: 674
Likes: 1
From: Daytona Beach Florida
easy ? for someone
My vette is a DD, but if I let it sit and don't drive it for one day. Then, the next time I drive it, it runs pretty rough for about a mile, then it clears up and is fine.
Leaky injector(s)? I ohmed them hot and cold and they tested fine.
Clogged cat(s)?
Leaky injector(s)? I ohmed them hot and cold and they tested fine.
Clogged cat(s)?
Safety Car
Joined: Jun 2006
Posts: 3,629
Likes: 28
From: FL
Leaking injectors is still a possibility, checking them with an ohmmeter just checks the electrical coil, they could still be bad mechanically. A plugged cat would not normally clear up after running a few minutes. Some scan data might help, could also be a sensor reading incorrectly. Good luck.
Le Mans Master
Joined: Jan 2006
Posts: 5,621
Likes: 206
From: Orlando FL
When you ‘ohm it out’, you only check the resistance of the coil in the solenoid. But the actual valve where it seals could still very well leak. That’s the mechanical part, separate from the electrical portion. Measuring the resistance is not a direct test of the valve.
So good measurements means maybe good, and bad measurements means solenoid portion might be weak, valve might be good but injector should be changed.
Thread Starter
Pro
Joined: Dec 2004
Posts: 674
Likes: 1
From: Daytona Beach Florida
Originally Posted by pcolt94
When you ‘ohm it out’, you only check the resistance of the coil in the solenoid. But the actual valve where it seals could still very well leak. That’s the mechanical part, separate from the electrical portion. Measuring the resistance is not a direct test of the valve.
So good measurements means maybe good, and bad measurements means solenoid portion might be weak, valve might be good but injector should be changed.
Originally Posted by rick lambert
Time to check the fuel pressure.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
Get the fuel pressure guage and attach it to the schrader valve. Turn the key to "on" and observe what pressure you have. Watch it for a while and see how long it takes to drop and what number it drops to. You can also pinch off the fuel return line after the system is primed to see if it drops slower or faster.
https://www.corvetteforum.com/techti...=278&TopicID=2
https://www.corvetteforum.com/techti...=278&TopicID=2
