Idle misfire

CHRISTINE ROTH

MEMBER
2007 CHEVROLET TRUCK
4.8L
AUTOMATIC
100,000 MILES

Truck has P0300 code.
What is causing misfires on one, seven, four and six?

Friday, June 16th, 2017 AT 2:51 PM

2 Replies

SATURNTECH9

MECHANIC
30,870 POSTS

If the miss fire is only at idle then I would be looking for a vacuum leak.

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