1999 Chevy Blazer 6 cyl Two Wheel Drive Automatic 133k miles
I just had my blazer in the shop last week to have the intake manifold gasket done. They told me a few other repairs she needed, which I proceeded to do on my own with the help of a neighbor. I replaced the ignition coil, plugs, wires, distributor and cap. Went to drive her after repairs were all complete and the " check engine" light was on, so I took her straight to the shop where they found that my neighbor had forgotten to plug the distributor back in. Light went off, problem solved, but as soon as I drove off I noticed a very slight knocking noise. Barely audible over the hum of the engine. Drove her home, put it in park and the noise got much louder. Gets faster with accelleration (while in park). Sound is less noticable while in drive OR with the AC on. Tried to see where it was coming from but I just can't tell, sorta seems like it's in the front/top. Could something have been knocked loose during repairs? It seems unlikely something else major would have " broken" in just the time it took me to get from the shop to the house.
Thanks in advance!
ADDED: Could it have ANYTHING to do with timing? We had to manually turn the engine to get the distributor to drop into place and my neighbor said it could be a tooth off in timing. Just wondering if this could cause the noise?
Thursday, March 26th, 2009 AT 10:57 AM