Spark Plug Repair Failure
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2nd Gear
Joined: Jan 2023
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Spark Plug Repair Failure
I have a 1999 Superduty, 5.4, 4WD. About a week ago I had a spark plug blow out of the head while on my way to work. Fortunately I was in a parking lot and immediately shut it off. I found a local shop who said they could fix the issue, so I had it towed there, where it remained for 5 days. They finally called and said that it was ready, but when I picked it up, it was still misfiring, The shop wanted me drive it and wait for a check engine light so the scanner would identify the misfire. My guess was that it was related to their repair, since it ran fine before. They gave me a hassle and I got my money back and limped the truck home. Long story short.
Today, I pulled that plug and inspected it, put a new coil pack on that cylinder and made sure everything was snug, but I still have a misfire......
Did my shop damage something installing the insert? Can the insert be removed? Valve damage????
TIA for any input. I gotta be back at work thursday so I need to solve this issue quickly.
Today, I pulled that plug and inspected it, put a new coil pack on that cylinder and made sure everything was snug, but I still have a misfire......
Did my shop damage something installing the insert? Can the insert be removed? Valve damage????
TIA for any input. I gotta be back at work thursday so I need to solve this issue quickly.
Last edited by regulator68; Jan 16, 2023 at 05:36 PM.
Hotshot
Joined: Jan 2004
Posts: 19,762
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From: St Louis
but I still have a misfire......
Did my shop damage something installing the insert? Can the insert be removed? Valve damage????
2. Depends on what they installed. Did they identify it?
3. Maybe. You'd have to do a cylinder pressure test including leakdown.
Laughing Gas
Joined: Jan 2019
Posts: 868
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From: Florida
Regulator68: Which spark plug blew out? I have a 2002 F-250 5.4L 2V CCLB 4WD (227,000) and my driver side #7 (one from the rear) blew out about 2-3 years ago. I only realized that some garage put in the "Auto Store" insert. So I bought the same not realizing the proven track record of CAL-Van inserts. Nor did I think I could do it. So at the time I re-installed a new "Auto Store" insert and it lasted about 2 years. Blew out again but caught it before it did any damage. I researched the Cal-Van method, ordered it ($230 for a set of 8 inserts) and did it. So far so go. I do have a check engine light only because the COP connector lost the clip. The fix is to zip tie to the fuel rail or get a donor connector. I went to LKQ and snipped off a couple to fix it. You can re-tapped the hole using the proven Cal-Van insert method.
Last edited by PJWhelan; Jan 17, 2023 at 09:05 AM. Reason: clarity
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2nd Gear
Joined: Jan 2023
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An update
Took the truck to a second shop and they quickly identified a second misfire due to coil pack failure. The first shop refused to even look further. I am back on the road and will see how the insert holds up. Thanks for the input!
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swilms
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