Car Questions
RepairPal is your advocate for car care advice and guidance

Knocking only at idle.

(1993 Buick Century)
in Orlando, FL on September 10, 2009
my car ran really sluggesh when i first got her but after a lil T.L.C she ran great for just about 9500 miles (still doing all the right stuff) but now only 45 miles after new oil and plugs there is a loud knocking sound coming from the back side of the motor. any answers?or answer?
Displaying 1 answers & 0 comments
Popular Answer
of Greg Solow's Engine Room on September 10, 2009
Knocking sounds are never a good thing! Of course check the engine oil level. Is the knocking sound associated with a drop in performance (knock sensor can retard ignition timing if it senses knock or detonation). Is the engine starting to misfire or run poorly. Time to get things check engine out in case its oil starvation, compression check, cylinder leakage test check the "strength" of your engine.
RepairPal estimates are guaranteed at over 2,000 quality certified locations nationwide. Learn more

Similar Questions

View answers to similar questions from RepairPal's community of auto experts and enthusiasts.
I get knocking or rattling noise from my transmission, even at idle. Usually, it's a knocking sound, but sometimes i...
It only starts knocking at higher RPMs What seems to make the problem better or worse? No How long have you had this ...
Didn't find what you were looking for?