2005 FX4 bucking and stumbling
07-18-2015, 10:46 PM
#1
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Thread Starter
2005 FX4 bucking and stumbling
Haven't posted here in awhile but hoping someone has seen this issue?
I have a 05 FX4 5.4L 160K and the truck really stumbles at around 45-55mphs below 1300RPM's although it does do it at higher MPH's but always below 1300RPM's.
No Codes
It has done this for a 3 or 4 years now but seems to be getting worse. I have noticed it is only when there is a little acceleration (below 1300 RPM's)
Coasting at idle or above that RPM there is never any issue.
A few times I did notice the #5 spark plug was loose and I tighten that and it was better but that is not the case, as it is tight.
There are no DTC codes as I have an edge installed and even uninstalled it but still have the same issue. Hoping to find out what is causing this as the wife can no longer take the bucking almost like it's running out of gas?
Very annoying to say the least even the kids are starting to notice.
Could it be a coil or a fuel issue?
I did a tune up and new fuel filter about 50K ago.
But it did it before that too so that's not going to solve it, I don't think?
This is not a new problem just more often
Don't want to get raped at the dealer for a couple grand I don't have.
Lifted truck And a lot invested really want to keep it for a long time.
Hoping for some help
Thanks in advance really appreciate any avenue someone might point me in
John
I have a 05 FX4 5.4L 160K and the truck really stumbles at around 45-55mphs below 1300RPM's although it does do it at higher MPH's but always below 1300RPM's.
No Codes
It has done this for a 3 or 4 years now but seems to be getting worse. I have noticed it is only when there is a little acceleration (below 1300 RPM's)
Coasting at idle or above that RPM there is never any issue.
A few times I did notice the #5 spark plug was loose and I tighten that and it was better but that is not the case, as it is tight.
There are no DTC codes as I have an edge installed and even uninstalled it but still have the same issue. Hoping to find out what is causing this as the wife can no longer take the bucking almost like it's running out of gas?
Very annoying to say the least even the kids are starting to notice.
Could it be a coil or a fuel issue?
I did a tune up and new fuel filter about 50K ago.
But it did it before that too so that's not going to solve it, I don't think?
This is not a new problem just more often
Don't want to get raped at the dealer for a couple grand I don't have.
Lifted truck And a lot invested really want to keep it for a long time.
Hoping for some help
Thanks in advance really appreciate any avenue someone might point me in
John
