I own a 1995 Mazda 626 ES with a V6 engine. My car shakes when I am in idle in drive or reverse, and when idle in park for awhile. When i shift into drive or reverse, rpm's go really low around 200 or 300 then jump to around 500 and 600. Sometimes the rpms dip so low that the car stalls. When i drive, it vibrates a little to about 15mph, then it runs smooth. I also tested the spark plugs and wires. I had the car running and took all of the spark wires one by one and the engine wanted to die a little each time i pulled one out, which i know is regular when you remove the wires. But when i pulled the spark plug wire from the #2 cylinder, the car wasn't effected and it didn't die down. I just bought the car and a Tune up was done about a month ago. There's spark coming from the #2 spark plug wire so it isn't the wires. Thinking it was a bad plug, i pulled the plug out, and replaced it with a new plug. When i pulled the wire off the #2 cylinder, still no effect on the engine. I also did a compression test on all the cylinders, and the all read around 150-160. I then thought that maybe putting fuel injection cleaner in the car would take care of any clogs that would possibly be in the fuel system. At first it did run a little smoother but then it went back to where it always was with the shaking.
What could this be? Its smooth in park but not in drive or reverse. I thought that it might be a motor or transmission mount, because when i shift to drive or reverse the motor moves forward a little. I was told tho that its normal for the motor to do that. Got any ideas on what it could be?
What could this be? Its smooth in park but not in drive or reverse. I thought that it might be a motor or transmission mount, because when i shift to drive or reverse the motor moves forward a little. I was told tho that its normal for the motor to do that. Got any ideas on what it could be?
Feb 14, 2011 at 11:07 PM