The check engine light is on in my '97 850R. The car hesitates above 4000 rpm all the way to redline. I took it to a few mechanics already and they got a reading saying something is wrong with the air/fuel distribution. I've already replaced the Air/Fuel Mass Sensor in the intake and all theoxygen sensors are in great working condition.When the car is idling in(D)rive the rpm drops 100-200 rpm sometimes but when it's in(N)uetral it doesn't drop at all and is all normal. I hope someone here on the forum can shed some light into my problem. Thank you.

 

Have the trouble codes read and post them here.

 

I'm located in Hong Kong so the codes that I got were all in Chinese and I don't want to bring it into the dealer just yet because they charge an arm and a leg. [:'(]

 

What about trying this?

http://www.volvo-forums.com/t7760-ho...ode-reader.htm