Mechanics

MISFIRE

1999 Ford Ranger

The check engine light came on so I put my scanner on it and it said that cylinder 2 and 6 was misfire so I replaced those 2 spark plugs and it still read the same so I changed all the plug wires and it is still reading that cylinder 2 and 6 has the misfire and the truck still has a miss so what could be the problem?
Avatar
Puertorico1963
September 23, 2013.



Have you checked the compression on those cylinders?You made sure you had a nice blue spark on those two cylinders?

Saturntech9
Sep 23, 2013.
Yes I have did this and the compression is good on both of them. It only missing while its idle but when I run it on the road it runs fine but when I stop at a red light it misses again

Tiny
Puertorico1963
Sep 23, 2013.
We need to look for a vacuum leak

Saturntech9
Sep 25, 2013.