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mgfarmer
Jul 7, 2006, 03:46 PM
I have a 97 honda civic with auto transmission. I noticed today when I reved the engine that when I let off the gas the engine made a very slight grinding noise. I was in park so I don't think it would be the transmission. While driving the car I have had no problems at all. Any ideas on what may cause something like this?

bhayne
Jul 21, 2006, 12:49 PM
The good news is that it's not the engine. Otherwise your engine wouldn't be running right now!

Reving the engine puts a lot of stress on the A/C unit if its on. Also look at power stearing or alternator. Check belt tightness and clearences.

CroCivic91
Jul 21, 2006, 02:58 PM
Start the engine, pop the hood and listen and see if you can pinpoint where it's coming from. See if it's coming from the distributor... there's a bearing inside that went bad on my Civic '90 about half a year ago, and it produced a horrible screeching noise.