How to make a motor smoother?
- Thread starter Spetz
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I think the vehicle is operating properly as far as shifting schedule.
If anything, the engine mounts are tired and are not isolating vibrations from the chassis properly.
IDK if they are fluid filled, but if they are, then my thoughts on that increase-- they may have become deflated/leaked out over time, moreso losing their isolation.
But, this is all entirely armchair speculation. It could be that the car came that way new and just operates this way.
If anything, the engine mounts are tired and are not isolating vibrations from the chassis properly.
IDK if they are fluid filled, but if they are, then my thoughts on that increase-- they may have become deflated/leaked out over time, moreso losing their isolation.
But, this is all entirely armchair speculation. It could be that the car came that way new and just operates this way.
Originally Posted By: Spetz
I've been unable to diagnose the miss though.
The car has had new:
Air, fuel and oil filter
New spark plugs, leads, distributor rotor and button
Ultrasonically cleaned and tested injectors
Hooked up to a diagnostics machine and all sensors were reading fine
Does this engine have adjustable valve lash?
It's time for a compression test.
I've been unable to diagnose the miss though.
The car has had new:
Air, fuel and oil filter
New spark plugs, leads, distributor rotor and button
Ultrasonically cleaned and tested injectors
Hooked up to a diagnostics machine and all sensors were reading fine
Does this engine have adjustable valve lash?
It's time for a compression test.
Why is it misfiring at low rpm and high load?
Originally Posted By: Spetz
I've been unable to diagnose the miss though.
The car has had new:
Air, fuel and oil filter
New spark plugs, leads, distributor rotor and button
Ultrasonically cleaned and tested injectors
Hooked up to a diagnostics machine and all sensors were reading fine
The only thing that seemed to have made the idle better (but not the vibration in the 1,000-2,000rpm range) is replacing the EGR solenoid. I then have tried blocking the EGR all together but this made no effect on idle.
What is the misfire count for each cylinder? Is one higher than the others, they all should be zero. A weak coil can cause problems.
I've been unable to diagnose the miss though.
The car has had new:
Air, fuel and oil filter
New spark plugs, leads, distributor rotor and button
Ultrasonically cleaned and tested injectors
Hooked up to a diagnostics machine and all sensors were reading fine
The only thing that seemed to have made the idle better (but not the vibration in the 1,000-2,000rpm range) is replacing the EGR solenoid. I then have tried blocking the EGR all together but this made no effect on idle.
What is the misfire count for each cylinder? Is one higher than the others, they all should be zero. A weak coil can cause problems.
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