Misfiring Cylinder, Lean Codes
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Misfiring Cylinder, Lean Codes
I have a "new to me" 2000 Ford F-150 RWD Lariat. I love it! The only problem I have is that I am getting what I think is a misfiring cylinder. There is no "Check Engine Light" yet but at Auto Zone, I did produce these two codes on their computer: P0171 & P0174. I guess this means that there is a "lean" mix of fuel in both banks of the engine? Anyway, I have had misfires at about 40-55 MPH both yesterday & this morning. The car seems to be moving forward, then it feels like the engine is shooting a dud. It gets over the problem and at higher speeds, it has no problem cruising strong.
Any help would be appreciated- thanks!
Any help would be appreciated- thanks!
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Joined: Jan 2011
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What engine?
Coil on each plug or coil packs and plug wires?
If you have plug wires:
open hood in a dark place
Start engine
look for a glow along the wires or sparks arcing
Anything like that - replace all the wires!
If COPs, order a set from Amazon or eBay (should be less than $100 for all 8)
Replace all of them along with the plugs.
I had a solid missfire on #3 under load, replaced the COPs and plugs and no more misfire.
I have a 97 xlt with the 5.4
Coil on each plug or coil packs and plug wires?
If you have plug wires:
open hood in a dark place
Start engine
look for a glow along the wires or sparks arcing
Anything like that - replace all the wires!
If COPs, order a set from Amazon or eBay (should be less than $100 for all 8)
Replace all of them along with the plugs.
I had a solid missfire on #3 under load, replaced the COPs and plugs and no more misfire.
I have a 97 xlt with the 5.4
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I have a 2000 5.4 V8. I'm not sure if it is coils over plugs or not. The mechanic that originally noticed the problem guessed it needed a new coil pack but since it was not to "Check Engine Light" status, he could not tell me which cylinder's coil pack needed to be replaced. I guess I will have to go look at it! Thanks for getting me started!
BTW, is it pretty cheap to replace all the coil packs? I'm a newbie on getting under the hood!
BTW, is it pretty cheap to replace all the coil packs? I'm a newbie on getting under the hood!
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Joined: Jan 2011
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Its COPs. the 5.4 got them starting in 97.
I bought 8 new coils on Amazon.com for less than $100 shipped.
I'd have to look at my receipt from the parts store to see how much the plugs were.
Its a pain replacing the coils and plugs. I only did 3 on the passenger side and I'm thinking of calling a couple of places to see what they would charge to do the rest with my parts.
I bought 8 new coils on Amazon.com for less than $100 shipped.
I'd have to look at my receipt from the parts store to see how much the plugs were.
Its a pain replacing the coils and plugs. I only did 3 on the passenger side and I'm thinking of calling a couple of places to see what they would charge to do the rest with my parts.
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