Hey folks:
I have posted before, but am taking one last shot here. I am chasing a vibration at idle, and have thrown a bunch of parts at the problem with no success.
I have replaced all 3 motor mounts, a brake line check valve, spark plugs, and even the brake light switch. I also cleaned the throttle body, and mass airflow sensor. (The brake line check value was replaced because brake reserve was lost when sitting overnight. The light switch was clicking loudly, and I was thinking it may be impacting the idle speed somehow).
Fuel trims at idle seem good (slightly positive) when the vibration happens. It is the worst when warm and the brake is on (say at a light).
The trans was rebuilt several years ago. (I started down the motor mount path because 2/3 attach to the trans. All three were worn, but not broken). The car has never idled smoothly, but has gotten worse since the trans rebuild.
Any other ideas I missed? The brakes work well, and the booster holds vacuum, so I ruled it out.
I have posted before, but am taking one last shot here. I am chasing a vibration at idle, and have thrown a bunch of parts at the problem with no success.
I have replaced all 3 motor mounts, a brake line check valve, spark plugs, and even the brake light switch. I also cleaned the throttle body, and mass airflow sensor. (The brake line check value was replaced because brake reserve was lost when sitting overnight. The light switch was clicking loudly, and I was thinking it may be impacting the idle speed somehow).
Fuel trims at idle seem good (slightly positive) when the vibration happens. It is the worst when warm and the brake is on (say at a light).
The trans was rebuilt several years ago. (I started down the motor mount path because 2/3 attach to the trans. All three were worn, but not broken). The car has never idled smoothly, but has gotten worse since the trans rebuild.
Any other ideas I missed? The brakes work well, and the booster holds vacuum, so I ruled it out.