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Author
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Topic: Check Engine Light ***HELP****
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six 5.0
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Member # 3153
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posted
 
 
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.
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IwishIwasan03COBRA!
Posts: 4425 | From: SAN MATEO | Registered: Aug 2003
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Blind
2.3L
CAFords OG
Member # 3052
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posted
probably a vacuum leak
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89 LX Notchback ex 4cyl, 14psi
02 Harley F150, 15psi
Posts: 8521 | From: Fairfield | Registered: Jul 2003
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six 5.0
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Member # 3153
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posted
quote:
Originally posted by Blind:
probably a vacuum leak
I think it might be also.... Im going to check for leaks in a sec.
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IwishIwasan03COBRA!
Posts: 4425 | From: SAN MATEO | Registered: Aug 2003
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six 5.0
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Member # 3153
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posted
No obvious leaks... any other suggestions?
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IwishIwasan03COBRA!
Posts: 4425 | From: SAN MATEO | Registered: Aug 2003
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Adam5.0
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Member # 6995
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posted
whats the misfire count number? did this only happen once or on going?
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want something old and japanese
Posts: 1609 | From: Brentwood | Registered: Aug 2006
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six 5.0
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Member # 3153
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posted
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?
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IwishIwasan03COBRA!
Posts: 4425 | From: SAN MATEO | Registered: Aug 2003
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1FAST89GT
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Member # 5071
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posted
change the wires then check the intake man gskt 4 leaks
Posts: 4915 | From: VALLEJO | Registered: May 2004
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jareds98gt
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Member # 7701
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posted
water on top of the plug???
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1997 Saleen S281 #192
Posts: 269 | From: nor cal | Registered: Jun 2007
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six 5.0
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Member # 3153
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posted
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.
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IwishIwasan03COBRA!
Posts: 4425 | From: SAN MATEO | Registered: Aug 2003
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2000blkz28
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Member # 9196
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posted
u sure there aint a vacuum leak? i had the same misfire and i was a vacuum leak
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headers
cai
flows
gears
future mods:
cam
heads
intake manifold
Posts: 27 | From: fremont | Registered: May 2009
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SHOalex
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Member # 7720
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posted
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
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BAM! POW! Right in the kisser.
Posts: 1448 | From: Oakland | Registered: Jun 2007
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JohnB
Tech Moderator
Member # 969
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posted
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.
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1965 Shelby Cobra
1993 Cobra
2012 F150 Raptor
2020 GT500
Posts: 6523 | From: Orlando FL/Redding CA | Registered: Mar 2002
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six 5.0
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Member # 3153
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posted
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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IwishIwasan03COBRA!
Posts: 4425 | From: SAN MATEO | Registered: Aug 2003
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