rx8 shuddering at idle

josejoe18 · 05-17-2012, 10:15 PM

Alright guys so im having trouble with my 2004 rx8. When its at idle the rpm's seem to be low and the car shudders. My father used to be a car mechanic for years but has never worked on a rotary engine so he has provided some insight to a degree. He told me that had the car had a normal engine he would of guessed it would have been the valves, but this car doesn't have any. We changed the spark plugs, the coils i even checked the throttle body. I ran the car through through our computer tester a while back and it said something about an "error with the control module". I don't believe its the engine mounts. Any insight you guys could provide me with would be great.'

thanks

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Grace_Excel · 05-17-2012, 11:31 PM

Check and clean the MAF and the ESS(Eccestric Shaft Position Sensor), are there any CEL? Since you have a 2004, I wouldn't rule out the engine mount(s).

Mazda TSB of testing the motor mounts:
- On manual transmission vehicles, when decelerating in 3rd gear with engine speed less than 3,000 RPM at approximately 30 MPH (50km/h), then quickly depressing the accelerator pedal again, a hesitation may occur. This symptom can only be observed in this engine speed and vehicle speed range.