Motor a little shakey when idioling
Hey i have 2007 f150 fx4 and my engine is a little shakey qhen stoped at a light but qhen in park smooth as ice??
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Originally Posted by D-Rock
(Post 6210269)
Hey i have 2007 f150 fx4 and my engine is a little shakey qhen stoped at a light but qhen in park smooth as ice??
I'd recommend getting a code reader with mode 6 capabilities. Its been a headache saver for me. |
Even with no check engine light ? I have no warning lights or anything. And honestly havent had any real issues with my truck.
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The link below helped me tremendously. No code misfire.
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Yes, you can have misfires without truck error codes. I have had that too and the aftermarket COPs, that I had used with no issue for around a year were the issue. I put in the old COPs and everything was fine again.
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If you have an android device (phone,tablet, chromebook) get yourself the TorquePro app and an ELM bluetooth reader.
Cheap (~$25) and puts a lot of info regarding your truck into your hands. It will allow you to see which cylinder(s) are misfiring and if there are any pending error codes. |
Something I've been curious about is how does the computer know precisely which cylinder is misfiring when it doesn't have a sensor per cylinder and records things per bank?
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It uses several tools
One-- it looks for the crank boost when that cyl is supposed to add torque . It also looks at the cop coil collapse kick coming back at it .
Just because you don't have any codes is not Legitimate claim of nothing wrong . Misfire have thresholds to set a cel otherwise they would be a real nuisance. Damage to cats can be underway , if you can feel it and it has other symptoms you know its not right . That's why you are here being proactive before something gets worse . That's why there is a mode six to look at raw computer counts per cyl towards setting a cel . Torque pro is really cheap . 5$ /old android phone/cheap bluetooth reader amazon . There are many fixes here. This engine is very sensitive about its ignition circuit . |
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