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Very rough idle

 
Old 02-09-2019, 08:16 PM
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Default Very rough idle

Hello all!
I am looking for advice for my '02 F150.
My friend and I have been working on it for several weeks. This is what we have done so far.
Replaced:
Mass Airflow sensor.
Pre cat 02 sensors
Fuel filter
Air filter.
Getting ready to replace plugs and wires.
Got egr code we haven't addrressed yet but we are eliminating each as we go.
No apparent vacuum leaks.
Very rough idle, especially when cold.
Help!
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Old 02-09-2019, 09:00 PM
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i think you have replaced more parts than necessary. go ahead and replace plugs and wires and see what that does
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Old 02-09-2019, 09:24 PM
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Originally Posted by DarrinT04 View Post
i think you have replaced more parts than necessary. go ahead and replace plugs and wires and see what that does
I have replaced what was coded. After replacement each code has not reappeared.
I failed to mention, the truck had 202k miles on it 1 year ago when I got it. It now has 239k miles.
It's an every day driver and runs fine when I accelerate.
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