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Author
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Topic: misfire codes
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MrMagooo
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Member # 2542
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posted
 
 
i was just wondering if any body out there has had problems with misfire codes. i have a 99 GT and am getting P0304 and P0307 mis fire codes. ichange hte coils from the #4 cyl. to the #1, and the #7 to the #5 cyl, stil getting the same code. so i thought must be injectors replaced the 4 and 7 injector and still am having the same codes. im don't know what else to check. so if any one can help me it would be greatly appreciated.
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99 Laser Red GT
02 954 RR
Posts: 17 | From: Williams | Registered: Mar 2003
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BlackNGold
CaliforniaFords.com
Moderator
Member # 655
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posted
Do you have an after market timming adjuster?...
It could be a number of problems...It could be a vacuum leak(cracked manifold), low fuel pressure, a bad valve spring, improperly seated valve, clogged cats and even a blown head gasket!...
Check your fuel pressure, measure your manifold vacuum and conduct a compression check.....
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-SLOWER TRAFFIC KEEP RIGHT-
Posts: 5132 | From: Bay Area, CA | Registered: Dec 2001
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66 AC COBRA
Nitrous King
Member # 904
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posted
have u pulled the plugs yet, pull them and make sure they are ok
check the wires for continuity, maybe a boot came loose
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FFR AC Cobra
72 Vega - WCHRA Extreme 10.5
Posts: 6280 | From: Winters | Registered: Feb 2002
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Hater
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Member # 3085
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posted
I had this same problem a few weeks ago on my 2001 gt,, I didnt put too much attention to it, so I did a reset, and the light did not turn on again,, but Im pretty sure its a bad spark plug that its causing this problem.
Posts: 168 | Registered: Jul 2003
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MrMagooo
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Member # 2542
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posted
thing is it runs great unless i keep it at about 2500 to 3000 rpm then it thowa hte codes, as for plug wires there r none. i have 8 seperate coils that sit right on top of the plugs. i also changed the plugs yesterday as well thinking i had bad plugs in those two cylinders.
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99 Laser Red GT
02 954 RR
Posts: 17 | From: Williams | Registered: Mar 2003
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MrMagooo
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Member # 2542
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posted
i'll check for vacum leaks btwouldn't it throw multiple codes if it was and not just the two cyl.
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99 Laser Red GT
02 954 RR
Posts: 17 | From: Williams | Registered: Mar 2003
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