Engine stumbles when given throttle

[vq5speed]

http://www.explorerforum.com/forums/showthread.php?p=3325894#post3325894



My engine just started doing this. It idles fine but when you give it gas it stumbles and won't rev up. Earlier before this I had a close call with my heater hose coming off. But it ran fine after I fixed that. Now might just be related or just coincidence now I have this problem... any ideas?

short vid
https://www.youtube.com/watch?v=DZY24TxSPPg&feature=youtu.be

 

[murkinstock]

I would clean the MAF, then check the TPS and make sure it's working properly, then do a fuel pressure test. Those are the three things that seem to relate to this. My 2 cents.

 

[vq5speed]

The MAF is clean I replaced the fuel filter that helped some. It revs higher now but still stumbles at around 3K. If I throttle it fast it stumbles around 2K. I was going to replace the FPR but mine doesn't leak it might be clogged. Doing some research tonite I think it could be the TPS. I am going to replace that tomorrow.

 

[Roadrunner777]

I had this once, with an intermittent check-engine light. It ended up being a clean but bad MAF. I would test the maf: http://easyautodiagnostics.com/ford_maf/maf_sensor_ford_1.php

And I would do a fuel pressure test. If you do the pressure test, please write down the values and post them.

 

[vq5speed]

Good news I replaced the TPS with a new one and that was it, its fixed! So she rolls again!

 

[x5050160]

I'm having the same issue pretty much. Etermitent throttle cut out happens once i get up to speed anywhere between 35 - 55 mph. Working fine then it just cuts out to about 10% throttle until i feather the pedal get back in it and then it takes off again. I replaced the TPS and that seemed to mke it worse. Anyone know the fix for this?

 

[vq5speed]

You could try replacing the fuel filter. I did that first and my problem improved some. So my filter was clogged but was not the primary problem.