Over the past 4 months, I've had this idling problem on my car. It's been getting worse as of late, so I'm finally fed up with it and asking for any advice as to what the problem may be??

Whenever I'm stopped at a red light, the car would idle up and down from 800-1000 RPM...it just keeps on going "vroom, vroom, vroom". This also occurs everytime when I start the car. When I put the car in *neutral* the sound goes away (I have an automatic). The car also feels like it has a loss of power when accelerating or switching between gears, but I'm not sure if this is related to the idle problem.

All the necessary maintenance (oil change, spark plugs, filters, fluids) has been done on the car and there is no check engine light on. The car has 77,000 miles. The throttle body has never been cleaned. That's about it. If there's any other information that you would need to help with my problem, please let me know.

Thanks in advance!

u have a text book elec. throttle module problem, very common . it needs replacement and is very expensive approx. 700 dollars, u can try cleaning it but it wont last, manufacturer of that etm is out of buisiness. it requires software when done so its not a backyard job.
loss of power between gears sounds like normal torque reduction function designed to smooth out gear changes.

Hi Flatbed,

Manufacturer of the our ETM is defunct. Did Volvo get a replacement
company or what? Can you elaborate.


thx

rd
--
99 c70 hptm 37k miles

My '00 C70HPT is doing the same thing from time to time. Not a huge annoyance, but would like to get repaired prior to the warranty going out. Has Volvo got a fix for it?