Truck Hesitates when accelerating
I can be driving down the road and my truck rides fine. I'll be going 30mph
and step on the gas and it kinda hesitates, it will rev real quick then actually
accelerate. I guess it is thinking about it and then kicks in. Also even then
once I am flooring it it doesnt seem to accelerate very fast. I have Googled
some other threads to see what I could find and try myself (I am not a car
genius). I bought a new fuel pump and a new throttle positioning sensor
and will install this weekend. But I didnt know if maybe it could be
something else and/or are there any more ideas you think it could be
Thank you for the help.
Dirty fuel injectors, run some cleaner threw the gas, On the fuel pump all you would have to do is check the fuel pressure to see if it is good.
And when you say "it will rev real quick then actually accelerate" makes me think the trany is slipping.
I recently replaced both VVT solenoids in my 2004 FX4 Supercrew and what a difference it made. Parts are about $50 ea on Amazon, took about 15 minutes to do the drivers side and 5 minutes for the passenger. I could not believe the difference it made in acceleration response time. My truck has 198,500 miles and I noticed it lagging upon acceleration and just overall lacking acceleration for quite some time. For $100 I think you will be happy with the results.
If the engine is increasing in RPM's and you are not accelerating, then suspect tranny slippage.
If u already bought the TPS sensor, replace it and see if it helps, it may have a bad spot in it that doesn't accelerate smoothly but bad VVT also give u the same condition
Forgot to say but I have replaced both VVT Solenoids. It has helped when the truck starts cold it doesn't make a loud banging noise for the first few seconds anymore. The old VVT's were definitely in need of changing.
Gotcha - So let me ask you this since we are basically driving the same truck. Does it feel like "Slack" when you step on it, rather than slip. Kind of Sluggish/Gutless
Yeah I guess it could be considered more slack than slip
Ok - are you running a K and N filter? Mine made a mess of my MASS Air flow sensor - I pulled it out and sprayed it down real good and that made acceleration a lot smoother with less of a slack feeling. I am also running larger tires, 2" lift, heavy winch/bumper and a fiberglass bedcover. I succumbed to some of that being a factor plus the 198K miles. If that doesn't help, I 'm out of ideas and will sit back and learn as other post here
HA, almost the same truck. I dont have a K&N filter but a cheaper Spectre cold air intake. I read in another forum that could be a problem as well, went out and bought some cleaner for it so we shall see tomorrow if it works. Still have a long list of fixes for this weekend, because it needs it plus maintenance. fun fun
Looks Good quinwerk - mines a little dirty
and a little nicer. That pic was from when I first got it. Thanks for all the help I appreciate it.
Anytime - I hope that fixes her up for you
Just doing some searching on the net for a similar issue I'm having. I was suspecting the TPS myself with my truck. Could you let me know if that's what resolved your issue?
Post a question, this one is from 11 months ago.
I have a 2007 F150 with 210k on my truck. Bought it new and well maintained. My truck had acceleration issues as read many posts on the net. It took me months to diagnose. I had access to a camera that you could snake inside the wall to see inside. Dewalt & Milwaukie make them. So I used to see behind the manifold to see is the intake manifold actuator was working. Why I did this?? It seemed that when I pushed on the accelerator it appeared to have no power then accelerate fast in say 4-6 seconds. To me it seemed like it was not getting any air. No miss,, no bucking just lack of power. So I got the camera setup and my wife started the truck and pressed on the accelerator. There was no movement on the actuator. Replaced this weekend and my truck works perfectly. Good luck R
MY 2007 F-150 XLT 5.4 litre hesitates on acceleration up to about 10 MPH. It will also do it if I'm at higher speeds and go to step on the gas. The wrench light comes on after a few miles, and stays on. I've replaced not only the TPS, but the whole dang throttle body...and still hesitates and light still comes on!! ugh! Runs very well otherwise. When it hesitates I just have to step on the gas more and it's fine. Wonder what it could be? The VVT solenoids on my engine are not easy to change, as you have to remove the valve covers to get to them. On other years you could just pull them out right through the covers without taking them off. They will not fit through on mine. Figures.
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