This is topic Check Engine Light ***HELP**** in forum Tech Talk at Northern California Ford Owners .
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Posted by six 5.0 (Member # 3153) on
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Wusp fellas, I have a 1997 Mustang GT, 4.6L 5-speed. The motor is all factory. It has approx. 130K. Recently replaced the upper intake manifold, the stock plastic piece-of-shit cracked. Long story short, I replaced the manifold and the car runs excellent...… BUT I have a" Check Engine Light" on. I put it on the scanner. It reads: Engine miss-fire on cylinder 2 and 8. No too lean or rich.... Just the miss-fire. like i said it runs excellent, I can not feel the miss. I can hear it a little throught the exhaust, but it has no loss of power???? I have checked the plugs, there good and replaced the coil packs, the code is still present. Not sure what is going on????? Suggestions will be a great help, thanks guys.
Posted by Blind (Member # 3052) on
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probably a vacuum leak
Posted by six 5.0 (Member # 3153) on
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quote:
Originally posted by Blind:
probably a vacuum leak
I think it might be also.... Im going to check for leaks in a sec.
Posted by six 5.0 (Member # 3153) on
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No obvious leaks... any other suggestions?
Posted by Adam5.0 (Member # 6995) on
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whats the misfire count number? did this only happen once or on going?
Posted by six 5.0 (Member # 3153) on
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quote:
Originally posted by Adam5.0:
whats the misfire count number? did this only happen once or on going?
Not sure what you mean by count #. The miss-fire is #2 and #8. Not sure of the actual code#. This IS an on going problem.... I was told to change the plug wires?
Posted by 1FAST89GT (Member # 5071) on
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change the wires then check the intake man gskt 4 leaks
Posted by jareds98gt (Member # 7701) on
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water on top of the plug???
Posted by six 5.0 (Member # 3153) on
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quote:
Originally posted by jareds98gt:
water on top of the plug???
Nope???
Their WAS when I had the cracked manifold. Since I changed it, its good.
I changed the plug wires, didn't work???
Thiis is FUKKKKIN annoying.
Posted by soveriegnz28 (Member # 9196) on
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u sure there aint a vacuum leak? i had the same misfire and i was a vacuum leak
Posted by SHOalex (Member # 7720) on
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You can check for vacuum with a small propane tank and a hose they have this little clicker that shoots burst of propane, you run the hose along any possible areas of leakage while shooting propane when you hear the engine idle change rapidly you found your leak maybe u can try that
Posted by JohnB (Member # 969) on
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quote:
Originally posted by six 5.0:
quote:
Originally posted by jareds98gt:
water on top of the plug???
Nope???
Their WAS when I had the cracked manifold. Since I changed it, its good.
I changed the plug wires, didn't work???
Thiis is FUKKKKIN annoying.
Change ALL the spark plugs. Use di-electric grease on the spark plug to boot ends.
Posted by six 5.0 (Member # 3153) on
:
quote:
Originally posted by JohnB:
quote:
Originally posted by six 5.0:
quote:
Originally posted by jareds98gt:
water on top of the plug???
Nope???
Their WAS when I had the cracked manifold. Since I changed it, its good.
I changed the plug wires, didn't work???
Thiis is FUKKKKIN annoying.
Change ALL the spark plugs. Use di-electric grease on the spark plug to boot ends.
Thanks guys, I will do the di-electric on the plugs. I will also check for more leaks.
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