Truck jerks in overdrive
11-08-2016, 03:46 PM
#1
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Truck jerks in overdrive
Hello, I have a 2007 F150 lariat 5.4l and when driving it in overdrive typically in between 40-50 miles an hour give or take a few while the engine is at 1100-1300 rpms the truck will start jerking or bucking. If I give it more gas, enough to be at 1600-2000 rpms or to down shift into 3rd gear the truck will not jerk or anything. Does anybody know what's going on? I'm thinking weak coil or maybe program error?? Also I am not getting any codes. Thanks
11-08-2016, 03:48 PM
#2
Sounds like a misfire.
Flashing check engine light?
How many miles on the truck?
Original plugs and coils?
Flashing check engine light?
How many miles on the truck?
Original plugs and coils?
11-08-2016, 03:53 PM
#3
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It's more than likely a misfire. If you can pull codes it should be there even without a CEL. Last time my truck did it I had to change the coil on cylinder 2. Good luck.
11-08-2016, 04:23 PM
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I just bought it with 120,000 miles on it.
No lights flash that I'm aware of.
I had autozone check the codes and they didn't find anything, I don't know how good their equipment is.
As far as original plugs and coils.. I think so because the fuel filter was still original, leading me to believe it's never had a tune up.
Runs great other wise though. Power is there and gas mileage looks normal just jerks at that low rpm in overdrive and I'm praying it's not the transmission
No lights flash that I'm aware of.
I had autozone check the codes and they didn't find anything, I don't know how good their equipment is.
As far as original plugs and coils.. I think so because the fuel filter was still original, leading me to believe it's never had a tune up.
Runs great other wise though. Power is there and gas mileage looks normal just jerks at that low rpm in overdrive and I'm praying it's not the transmission
11-08-2016, 07:15 PM
#5
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Clean your MAF and throttle body. I would also drop your spare tire and check out your FPDM.
Also, might as well check out the condition of the foam around the air filter tray.
Also, might as well check out the condition of the foam around the air filter tray.
11-08-2016, 07:27 PM
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I'm not sure what the FPDM but the air filter got changed the other day it was disgusting and the foam around the tray is almost gone. What impact could that foam have since it's underneath the filter? And I'll try cleaning the MAF Thursday.
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11-08-2016, 10:45 PM
#8
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More than likely a faulty coil. But yeah, most likely a misfire.
11-08-2016, 10:53 PM
#9
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FPDM - Fuel pump driver module. Mounted to the rear crossmember, and tends to corrode out on the backside, and let moisture in. Causes all kinds of goofy issues.
What I mean about the foam is, when you undo the two clips to slide the tray out, there should be a foam seal, on the tray itself. If it's gone, you can make a new seal out of weatherstripping. The peel and stick kind.
Chances are, that you need plugs, or a coil-on-plug, but these are also a few things to look at.
The reason I said a MAF and throttle body cleaning, is because I had the exact same problem as you, and after doing those two things, and a new fuel filter, my truck was cured. Mine actually got so bad, that it went into limp mode.
11-09-2016, 09:40 AM
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Those are just a few things, that are common issues on these trucks.
FPDM - Fuel pump driver module. Mounted to the rear crossmember, and tends to corrode out on the backside, and let moisture in. Causes all kinds of goofy issues.
What I mean about the foam is, when you undo the two clips to slide the tray out, there should be a foam seal, on the tray itself. If it's gone, you can make a new seal out of weatherstripping. The peel and stick kind.
Chances are, that you need plugs, or a coil-on-plug, but these are also a few things to look at.
The reason I said a MAF and throttle body cleaning, is because I had the exact same problem as you, and after doing those two things, and a new fuel filter, my truck was cured. Mine actually got so bad, that it went into limp mode.
FPDM - Fuel pump driver module. Mounted to the rear crossmember, and tends to corrode out on the backside, and let moisture in. Causes all kinds of goofy issues.
What I mean about the foam is, when you undo the two clips to slide the tray out, there should be a foam seal, on the tray itself. If it's gone, you can make a new seal out of weatherstripping. The peel and stick kind.
Chances are, that you need plugs, or a coil-on-plug, but these are also a few things to look at.
The reason I said a MAF and throttle body cleaning, is because I had the exact same problem as you, and after doing those two things, and a new fuel filter, my truck was cured. Mine actually got so bad, that it went into limp mode.
