electrobrandino
New Member
Hello all!
We recently purchased a 99 XLT 5.4L 4x4. It "only" had 151k miles on it and overall the SUV is in awesome condition. Only major issue it had was losing fuel pressure, which caused long start times. I replaced the fuel pump and the thing starts like a champ now (there was a hole in the rubber fuel line between the pump and the rest of the assembly).
One issue it is experiencing though, which is more of an annoyance, is at 45+mph, if i even SLOWLY take my foot off the gas, it feels like someone quickly pressed the brakes and the car seems to decelerate pretty quick....then if I SLOWLY press the gas again, the car bucks a little.
I can find the sweet spot too, to where if i let off and press the gas over and over (were talking moving the pedal a matter of like 2 milimeters), the car kicks back and forth... So i really dont think its anything sticking around the throttle body....Maybe TPS? Doesnt feel like a mechanical issue...more vacuum or electrical...
I've done some research, but a lot of posts end up being a known issue with that make/model of vehicle...really scratching my head on this one.
FYI
1. There is no engine light on
2. No, the engine light bulb is not burnt out
3. No stored codes
Any suggestions are appreciated! Let me know if you need more info!
We recently purchased a 99 XLT 5.4L 4x4. It "only" had 151k miles on it and overall the SUV is in awesome condition. Only major issue it had was losing fuel pressure, which caused long start times. I replaced the fuel pump and the thing starts like a champ now (there was a hole in the rubber fuel line between the pump and the rest of the assembly).
One issue it is experiencing though, which is more of an annoyance, is at 45+mph, if i even SLOWLY take my foot off the gas, it feels like someone quickly pressed the brakes and the car seems to decelerate pretty quick....then if I SLOWLY press the gas again, the car bucks a little.
I can find the sweet spot too, to where if i let off and press the gas over and over (were talking moving the pedal a matter of like 2 milimeters), the car kicks back and forth... So i really dont think its anything sticking around the throttle body....Maybe TPS? Doesnt feel like a mechanical issue...more vacuum or electrical...
I've done some research, but a lot of posts end up being a known issue with that make/model of vehicle...really scratching my head on this one.
FYI
1. There is no engine light on
2. No, the engine light bulb is not burnt out
3. No stored codes
Any suggestions are appreciated! Let me know if you need more info!