Engine severely shaking, I'm at a loss
#1
04-07-2016, 09:24 PM
Engine severely shaking, I'm at a loss
Hello, I'm going to try my best to give you as many details as I possibly can here..
My truck is a 2003 F150XL 4.2L V6 2WD automatic, manual windows/locks/etc
VIN# 2FTRX17253CA12755
Mileage approximately 225,680 ish
It has an oil leak (pretty sure coming from the oil pan gasket and/or oil filter assembly gasket)
Fouls plugs every couple months (white ash buildup)
Most recently the engine began shaking, loss of power, throwing a blinking "check engine" light. I stopped the truck as soon as I could. After diagnosing with a friend I R/R the coil pack (one coil pack controls all plugs). In diagnosing we:
°checked code - misfire on #5
°swapped plugs
*no change
°checked spark from wires
*no spark on #5
°swapped working wire to #5 on coil pack
*no spark on #5, previous wire was now sparking fine on new connection
°installed new coil pack
That fixed the problem for a week. Truck ran fine until I left work on Wednesday. It, again, began shaking violently however didn't throw "check engine" light this time. I pulled over immediately and got it towed home. In diagnosing this time we:
°checked codes
*misfire #5
°checked spark on #5 wire
*no spark
°checked spark on #5 of NEW coil pack
*no spark (seems odd that it would be an identical issue with the new coil pack. To me, this is a trend)
I thought about swapping for better coil pack and wires BC I tend to buy the cheapies (225+k miles - I tend not to want to put more money into this except when absolutely necessary) but I'd really rather not throw parts at the engine without any real ideas about what is causing this tiring trend.
Any ideas or insights would be greatly appreciated!! I'm, thankfully, not in a rush so I will not be making any forced snap decisions.
Thanks, in advance, for your help!!
My truck is a 2003 F150XL 4.2L V6 2WD automatic, manual windows/locks/etc
VIN# 2FTRX17253CA12755
Mileage approximately 225,680 ish
It has an oil leak (pretty sure coming from the oil pan gasket and/or oil filter assembly gasket)
Fouls plugs every couple months (white ash buildup)
Most recently the engine began shaking, loss of power, throwing a blinking "check engine" light. I stopped the truck as soon as I could. After diagnosing with a friend I R/R the coil pack (one coil pack controls all plugs). In diagnosing we:
°checked code - misfire on #5
°swapped plugs
*no change
°checked spark from wires
*no spark on #5
°swapped working wire to #5 on coil pack
*no spark on #5, previous wire was now sparking fine on new connection
°installed new coil pack
That fixed the problem for a week. Truck ran fine until I left work on Wednesday. It, again, began shaking violently however didn't throw "check engine" light this time. I pulled over immediately and got it towed home. In diagnosing this time we:
°checked codes
*misfire #5
°checked spark on #5 wire
*no spark
°checked spark on #5 of NEW coil pack
*no spark (seems odd that it would be an identical issue with the new coil pack. To me, this is a trend)
I thought about swapping for better coil pack and wires BC I tend to buy the cheapies (225+k miles - I tend not to want to put more money into this except when absolutely necessary) but I'd really rather not throw parts at the engine without any real ideas about what is causing this tiring trend.
Any ideas or insights would be greatly appreciated!! I'm, thankfully, not in a rush so I will not be making any forced snap decisions.
Thanks, in advance, for your help!!
#2
04-07-2016, 09:54 PM
Welcome to FTE LoBall 
Scrolling through FTE you will find Year and Model or Engine specific threads where you can post questions since this is the new Member thread.
For the year and Model 1997-2003 F150
Engine specific 3.8 & 4.2l V6
I hope this helps you find the answer to your questions. The people here are top notch and willing to help. Enjoy!
Scrolling through FTE you will find Year and Model or Engine specific threads where you can post questions since this is the new Member thread.For the year and Model 1997-2003 F150
Engine specific 3.8 & 4.2l V6
I hope this helps you find the answer to your questions. The people here are top notch and willing to help. Enjoy!
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