My recently rebuilt 95 ExtCab V6 Auto has developed a strange problem.
When I start it up in the morning and after work, it idles smooth, but from about 20% throttle to 60% it seems to miss rhythmically , sounds like a StarWars Pod racer is the closest description. No CEL since the rebuilt motor was installed.
Once it warms up, then it's smooth, there's a little fluctuation in the 30-50% range, but it's slight, if the radio's on I don;t even notice it.
If it's cold and I floor it, it pulls hard once the RPMs come up. But the vibration does not seem to be RPM or speed related. I tried re-seating a bunch of the connectors to the coils/igniter/MAF/throttle sensor.
I've run several cans of injector cleaner and premium gas seems to help a little, part of the rhythm seems to be pre-ignition.
Fluids all look good, and mileage seems normal, other than I leadfoot it a bit to avoid the rough spots.
When I start it up in the morning and after work, it idles smooth, but from about 20% throttle to 60% it seems to miss rhythmically , sounds like a StarWars Pod racer is the closest description. No CEL since the rebuilt motor was installed.
Once it warms up, then it's smooth, there's a little fluctuation in the 30-50% range, but it's slight, if the radio's on I don;t even notice it.
If it's cold and I floor it, it pulls hard once the RPMs come up. But the vibration does not seem to be RPM or speed related. I tried re-seating a bunch of the connectors to the coils/igniter/MAF/throttle sensor.
I've run several cans of injector cleaner and premium gas seems to help a little, part of the rhythm seems to be pre-ignition.
Fluids all look good, and mileage seems normal, other than I leadfoot it a bit to avoid the rough spots.