studdering issues
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Freshman User
Joined: Aug 2004
Posts: 29
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From: Las Vegas
studdering issues
I have a 99 F-150 2 wheel drive with a 4.6 eng and an automatic trans. I am having an issue with it cutting out at different speeds. I have replaced the fuel filter and air cleaner and trying to figure out the next step. I pluged in my computer to the truck and it is saying I have misfiring in cylinders 1,2, & 4. Any advise would help.
Thank you, Todd
Thank you, Todd
Senior User
Joined: Feb 2005
Posts: 414
Likes: 0
From: Southwestern Pa.
If the plugs and wires are good the next thing i would check is an O2 sensor for that bank of cylinders. A crank position sensor would cause it to die at speed.
Also check for any vacuum leaks or lose electrical connections.
good hunting.
Also check for any vacuum leaks or lose electrical connections.
good hunting.
Senior User
Joined: Feb 2005
Posts: 131
Likes: 0
Swap the coil packs and see if the misfire changes cylinders. If so, you have a bad coil pack. Also could possibly be fuel pump, fuel filter, fuel injectors, bad gas, or bad spark plugs/wires even though they arent that old. I'd swap the coils first thing, clear my codes and see if the misfiring cylinders change.
