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2002 Chevrolet Impala
Question: Do I have a bad oil pump or rod?
Recently I let my vehicle sit for atleast two months after replacing BCM. So I finally replace my transmission filter but now I hear a tapping sound coming from the engine. I have replaced spark plugs and change the oil using synthetic oil also. Now temperature stays at normal level. When I put the vehicle into reverse it tends to jerk. Once I put the vehicle into drive it begins to drive but acts as if its missing until I get into higher speed and runs fine until I slow down. Also I my check engine light flashes on and off.
Answer #1wetry August 24, 2012, 16:49Master
Sounds like lifter collapse may pump back up with running the engine.
SCAN CODES AND POST YOU HAVE A MISFIRE OR ROCKER ISSUE. LIFTERS DON'T CALP ANYMORE.YOURS MAYBE DIRTY AND NEED TIME TO CLEAR OUT OR ONE IS STUCK
Replywetry, August 24, 2012, 18:00Master
Well i didn't know that this engine does not use hydraulic lifters thought that
was what provided lash adjustment. So you have to adjust the old fashion way.
Never done that on an engine like this one.
Replyglobalhelper, August 24, 2012, 18:03Master
they are hyd but haven't changed a lifter in the newer motors in yrs. maybe there is debri in oil hole
Replywetry, August 24, 2012, 18:15Master
I am just like you i did not know because i haven't changed any either.
Replyglobalhelper, August 24, 2012, 20:37Master
right on brother