My V70 drives rough but the idel is ok, the check engine light is not on. It doesn't overheat. When in PARK I press the gas pedal it makes a rough (grrrrrrr)sound. When driving it makes the rough (grrrrrr) sound and doesn't accelarte as quickly as before from stop or while on the move. I have checked the spark plugs and they are ok. The ignition coil boot had a cut and I replaced it and no change. Can you help?
Rough running and not enough power on 1999 Volvo V70
by Gazzan in Glendale, CA on May 18, 2010
3 answers 1 comment
ANSWER by Visitor on May 19, 2010
Check the easy things first: -spark plugs -wires -cap and rotor *if DI ignition* -blocked or failing Catalytic Converter (after driving feel the exhaust before and after the cat, as well as the cat itsself. If the cat-back is a major heat difference than in front deem the converter a fail and replace)
COMMENT by Gazzan on May 25, 2010
One of the ignition coils was bad. I have changed it and have changed the spark plugs. The rough grrr is gone, but I have a different problem now. The engine shuts off after driving for 5 minutes. I guess when it heats up then it shuts off. Any ideas?
ANSWER by Bret Bodas on May 25, 2010
Hi, I would check the codes anyway, some may be stored even if the light is off. The fuel pumps can fail on these, I would check the fuel pressure and power to the pump when it is shutting off.
ANSWER by Visitor on November 26, 2010
youg might have a bad fuel relay or your fuel pump might have abad seal or air filter might need replaced