5.4 missfire

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09-05-2013, 09:40 PM

#21

Drop Tine

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Quote:

Originally Posted by primalurges

If your getting a lot of popping and occasional random misfire codes I'd look at timing or cats. If the popping is not happening at idle and mostly under heavy acceleration I'm thinking bad cat or cats may be more likely.

It happens at idle and while driving

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09-05-2013, 09:47 PM

#22

2thousand5.4

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Quote:

Originally Posted by GrimaceTimus

Well...this post is in the 2004-2008 part of the forum. I know some folks will post topics in the wrong place sometimes, but if you post in here, I am going to assume you have a 2004-2008 F150....and if you say you have a 5.4L, I am going to assume it is a 3V, VCT engine (no EGR).

Sorry I just look at the new post I didn't notice what section it was in

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09-05-2013, 10:12 PM

#23

GrimaceTimus

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Quote:

Originally Posted by 2thousand5.4

Sorry I just look at the new post I didn't notice what section it was in

No worries man...I'm not trying to be a d1ck.

Back on point...I agree with primal's recent comments.

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09-05-2013, 10:29 PM

#24

primalurges

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Quote:

Originally Posted by Drop Tine

It happens at idle and while driving

Is it bogging down at all during hard acceleration or just popping?

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09-05-2013, 10:58 PM

#25

Drop Tine

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Quote:

Originally Posted by primalurges

Is it bogging down at all during hard acceleration or just popping?

I would say mostly popping but occasionally bogging down to where I have no power and not gaining any speed

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09-05-2013, 11:08 PM

#26

2thousand5.4

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Quote:

Originally Posted by Drop Tine

I would say mostly popping but occasionally bogging down to where I have no power and not gaining any speed

Could be getting bad redeadings from the o2 sensors. Any aftermarket mods or tunes?

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09-05-2013, 11:20 PM

#27

Drop Tine

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Quote:

Originally Posted by 2thousand5.4

Could be getting bad redeadings from the o2 sensors. Any aftermarket mods or tunes?

I just had that replaced. And just an airaid cold air intake and exhaust

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09-05-2013, 11:33 PM

#28

primalurges

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If you have a lot of popping which seems to be the case and occasional bogging and loss of power I have to lean to plugged cats. And as ga as CAI is concerned most of those need a tune and if they don't get the engine runs too rich an can damage cats. Next time you take it out at night for a good drive pull over when you start to get the power loss and bogging and pop the hood to see of your manifolds are glowing orange. If they are it's definitely your cats.

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