bad miss fire
03-12-2009, 04:48 PM
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bad miss fire
i have a 1998 excab with the 4.6 its a great motor except lately its been miss firing. when i acelerate from a dead stop it miss fires but no when i am at idle or constant speed then again when i acelerate at any speed to a higher speed here comes the weird part its not pulling any codes not even turning the check ingine light on??????? any ideas maybe a coil wirees plugss i need ideas motor has 157000
03-12-2009, 06:37 PM
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i have a 1998 excab with the 4.6 its a great motor except lately its been miss firing. when i acelerate from a dead stop it miss fires but no when i am at idle or constant speed then again when i acelerate at any speed to a higher speed here comes the weird part its not pulling any codes not even turning the check ingine light on??????? any ideas maybe a coil wirees plugss i need ideas motor has 157000
03-12-2009, 07:49 PM
#3
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Be patient, reliable sources here say not all miss fires will thro a code, like its hard to detect or something Am a nuts and bolts guy versus the computor guru, if responses don't favor your liking, suggest trying the search heading, real good info there.
03-12-2009, 10:05 PM
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My 2000 F150 4.6 does the same thing. first the CEL came on and It said 1 and 2 mis fire so I replaced the plugs it ran good for a few weeks and then decided to act up again this time no codes. I replaced the injectors and coil packs at the same time.. Still no CEL but runs like Hyundai