Mechanics

LOTS OF MISFIRE

Volvo S80

I've been gettin a lot of misfire I have a volvo s80 2.9 engine non turbo 1999. Cylinder 1, 2and 3 spark plugs were all full with combustion. I replaced them with new ones and also switch the coil pack to cylinder 4, 5, and 6. Within 30 min the same thing happened on the same side. So I know the coil packs are working. What can my problem be. The obII gives me the code of p0134, p0300 and p1174.
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Lhe4sho
November 15, 2007.



I am having this same problem. I have good spark at all cyllenders, good fuel. What else could it be? Head gasket maybe?

Tiny
DaveJoseph84
Jul 17, 2012.
Check fuelpressure and check for vacuum leaks

Hmac300
Jul 17, 2012.