Why is my truck miss firing

Asked by Mark Jul 20, 2020 at 09:31 PM about the 2006 Ford F-150 XLT SuperCrew Styleside LB 4WD

Question type: Maintenance & Repair

I have an 06 Ford F150 5.4 4 x 4 was getting the
PO420 and the po430 codes oh I had the Cadillac
converters deleted and it's still spits and sputters
on take off and acts like it's missing real bad
spark plugs and coil packs only have about 2,000
miles on them what could possibly be the
problem


3 Answers
9,705

brotherben answered 4 years ago

Sorry but I have to ask, did you weld anything to the pipes to put the O2 sensors in them or unplugged and discarded them?

1 people found this helpful.
Mark helpful

John_B_Sr answered 4 years ago

I did weld the 02 sensors to the pipe where it had a crack along where they connect with each other. Why? How is that affecting the engine making it spit and sputter. More importantly. . . how do I fix it.

Mark helpful
9,705

brotherben answered 4 years ago

Malfunctioning O2 sensors can cause the sputtering. I'm asking because I've seen it happen when people modify their exhaust with discarding or installing the sensors incorrectly. And plus your engine codes are directed to the O2 sensors.

Mark helpful

Your Answer:

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