Ive replaced all the coil boots and spark plugs recently in my truck and As i was driving today my truck started to shake and sputter. The check engine light started blinking fast i then pulled over and restarted the truck it drove fine until i hit a bigger incline. It then started to jerk extremely hard. i then got onto the interstate and when i hit around 2k rpms and about 55-60 mph it started to do it again. Now the check engine light is on all the time. this just happened today any ideas? Full tank of gas and was fine until today!

 

Have you done anything with the fuel filter or fpdm?

 

no i haven't even looked yet I'm taking it to a mechanic tomorrow to see what it was. i hope its nothing severe

 

what code did it set...? a blinking cel is indicating a mis-fire condition

 

Aftermarket COP's?

 

happened to me once when I tried Champion spark plugs. They didn't last very long before misfiring. I swapped them all out for Motorcraft and problem solved.

I believe you can check trouble codes in the gauge test mode. press and hold the odometer reset button or the message center reset button. Turn the key to the RUN position and hold until the display indicates tESt or TEST usually within three seconds. Press the reset button once to advance through each stage of the self-test.

 

First things first, make sure all your coils are hooked up to the wire connector well.

 

Turned out to be a mis fire in cylinder 8. It was a bad spark plug but it was under warranty so it didn't cost any thing! I couldn't believe it! Took 15 mins to fix!

 

which brand did you put in?

 

motorcraft