1999 F150 Stuttering issues
04-08-2019, 03:20 PM
#1
1999 F150 Sputtering issues
Ok, I'm new to this board and to the truck. It hasnt been very well maintained before I bought it and I'm trying to do my best to get some issues fixed. But heres my biggest.
When reaching 55mph - 75mph , it starts to stutter. I originally thought fuel filter or spark plugs and wires. All of that was changed, and it still happens. I have noticed that if it happens, I can pull over and turn the engine off and back on and it goes away. This makes me think it's a computer or sensor problem. Any help would be amazing.
I also have a very small rear seal transmission leak. I am aware of this but wanted to fix the stuttering first. Could this be the culprit?
The truck is a 1999 F150, 4.2 V6.
If I seem like a noob, its cause I am, so please bear with me.
When reaching 55mph - 75mph , it starts to stutter. I originally thought fuel filter or spark plugs and wires. All of that was changed, and it still happens. I have noticed that if it happens, I can pull over and turn the engine off and back on and it goes away. This makes me think it's a computer or sensor problem. Any help would be amazing.
I also have a very small rear seal transmission leak. I am aware of this but wanted to fix the stuttering first. Could this be the culprit?
The truck is a 1999 F150, 4.2 V6.
If I seem like a noob, its cause I am, so please bear with me.
Last edited by Bobby Slovak; 04-08-2019 at 07:34 PM.
04-08-2019, 07:11 PM
#2
Senior Member
If it keeps stuttering it may need a speech therapist.
What brand plugs and wires? These trucks don't do that good on aftermarket ignition parts.
What brand plugs and wires? These trucks don't do that good on aftermarket ignition parts.
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JCR 56 (04-08-2019)
04-09-2019, 01:50 PM
#7
Heres the run down. I bought a 1999 F150 XLT 4.2 V6, as is. I knew it had some issues. The issues were :
PCV valve needed replaced
Small leak in rear seal of transmission
Needed new fuel filter
Needed spark plugs / wires
On the dash, the theft light blinks rapidly then goes to a slow blink.
ABS light is on
Odometer is some times showing and some times doesnt.
Over drive blinks off repeatedly
What I didnt know:
It sputters when accelerating at anywhere from 45 - 75mph. This happens at any time, but usually when accelersting or decelerating.
I've already changed Plugs, Wires, Fuel filter, and PCV valve. My CEL is on, here were the codes:
P0174
P0401
P0708
P0340
P0171
0171 and 0174 are gone. Those disappeared when I did the PCV Valve. I wanna say 0401 went away as well, but I havent checked in a week.
Mainly I wanna know what is causing the sputtering. I have learned that if it starts to do it, I can pull over and kill the engine, restart it and it doesnt do it again. So I'm thinking it's an engine thing.
To be clear, this sputtering happened before I fixed some things and after. The plugs I bought are motorcraft and the wires I bought are duralast. Both were put on correctly.
Any help would be appreciated. Its driving me nuts.
This is what I put on another forum. I posted the one here yesterday at lunch and couldnt go into alot of detail. This here is basically everything I can think of.
PCV valve needed replaced
Small leak in rear seal of transmission
Needed new fuel filter
Needed spark plugs / wires
On the dash, the theft light blinks rapidly then goes to a slow blink.
ABS light is on
Odometer is some times showing and some times doesnt.
Over drive blinks off repeatedly
What I didnt know:
It sputters when accelerating at anywhere from 45 - 75mph. This happens at any time, but usually when accelersting or decelerating.
I've already changed Plugs, Wires, Fuel filter, and PCV valve. My CEL is on, here were the codes:
P0174
P0401
P0708
P0340
P0171
0171 and 0174 are gone. Those disappeared when I did the PCV Valve. I wanna say 0401 went away as well, but I havent checked in a week.
Mainly I wanna know what is causing the sputtering. I have learned that if it starts to do it, I can pull over and kill the engine, restart it and it doesnt do it again. So I'm thinking it's an engine thing.
To be clear, this sputtering happened before I fixed some things and after. The plugs I bought are motorcraft and the wires I bought are duralast. Both were put on correctly.
Any help would be appreciated. Its driving me nuts.
This is what I put on another forum. I posted the one here yesterday at lunch and couldnt go into alot of detail. This here is basically everything I can think of.