Normal compression on 4.6?
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Normal compression on 4.6?
engine has 250,000 miles, but just had a tune up around late January or early February...now it's misfiring on #4 & #7, can't figure it out?? Replaced the plugs just to make sure but still doing it?? Checked the compression and it has 125 psi on #7...is that normal? What could be the problem...valves?
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I can't figure it out...I've checked the codes one time and it said #4 & #7 were misfiring...cleared the codes and it set the check engine light off again with the same exact codes...it doesn't jerk and shake all the time...it goes and comes but keeps giving the same codes...coil packs are arcing fine on the cylinders...what do you think it could be?
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Joined: Oct 2006
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From: SE Texas
I can't figure it out...I've checked the codes one time and it said #4 & #7 were misfiring...cleared the codes and it set the check engine light off again with the same exact codes...it doesn't jerk and shake all the time...it goes and comes but keeps giving the same codes...coil packs are arcing fine on the cylinders...what do you think it could be?
JL
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