Question about 2006 Ford F-150
Blinking CEL is a misfire indicator.
If this only happens when you are passing, a cylinder ( known which one unless the CEL is set ) is having an issue at high use / load.
The only thing you can do without the CEL being set ( so a DTC of P030n where n= 1 to 8 for the cylinder number ) is to remove, clean and reinstall the COP ( Coil on Plugs ) and check the wiring to the COPs ). If this does not cure it, the next step ( to remove them as the issue ) is to replace all the plugs.
This is a trial and error method, but without the issue being bad enough to cause the CEL to be set, you have no way of knowing which cylinder(s) is causing the misfire. This is not a transmission issue, and could be electrical if the COP / wiring to the COP is causing the issue, but 75% sure it is a plug or COP to plug connection causing the misfire under load.
There could be a method of bench testing the items to know which, I do not know if this is true, or how to do it if it is the case.
Posted on Nov 14, 2010
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Posted on Jan 02, 2017
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