Hello, a misfire can be caused by just about anything. Did you visually check for spark at the plugs? Fuel pressure ok, use a gage?
August, 6, 2009 AT 12:12 PM
Yesi have visually checked spark have it 1 and 3 still misfieing
August, 6, 2009 AT 12:36 PM
What was the fuel pressure spec? Are the injectors pulsing?
August, 6, 2009 AT 4:09 PM
The fuel pressure was good and the injectors are pulsating could the lobes be worn or valves burnt how do I find out
August, 7, 2009 AT 7:18 AM
You can't check proper fuel pressure without using a gage. Do a compression test on the cylinders.
August, 7, 2009 AT 1:24 PM
Compressioncheck is 180 lbs we did a leakage test and 1 and 3 misfires 2 and 4 has a 25% leakage
August, 9, 2009 AT 10:20 AM
Maybe I misunderstood your post. To do a cylinder leak down test, the engine isn't running. The cylinder your checking, you bring the piston up to tdc compression stroke, pump in air through the spark plug hole, shut the air valve off, watch for a leak-down. Right now, I'm not sure why the misfire.