Car jerking after pressing accelerator

gasoline
pedal

#1

1995 Fort Taurus, 3.8, pressing gas pedal does not do anything, then car jerks and accelerates. Sometimes, does not do that even and in that case further pressing it, induces a squeaking noise on the passenger side of engine like an axle turning and squeaking. Gets worse going uphill when it does not pull, I retract gas pedal then press again, eventually works. Sometimes gets worse if I turn by car starting to shake and give rattling noise when I press accelerator. Withdraw it then O.K. Is this going to explode or what ?


#2

Have you checked the level of the transmission fluid lately?


#3

Thanks for your response.
I thought I check this regularly and I did. Now that you said it I will check it again – that’s how desperate I am.
Somebody said that it may be due to a gas (accelerator) electronic sensor. Does it make sense (excuse the pun)


#4

How do you RETRACT the gas pedal? DO you pull it up with your foot, or hand? A dirty fuel filter will keep the car from accelerating or hill climbing. It could use fresh spark plugs for that misfiring condition.


#5

Is the check engine light on? Sounds like it could be a bad TPS (throttle position sensor). The car might not realize you’re pushing the gas pedal down. If the throttle opens and the car doesn’t realize it it’s like having a bid vacuum leak which will make the engine shudder and run rough, and not accelerate. Just a thought. A bad TPS will usually set off a check engine light though.


#6

See my comment re transmission fluid. The check engine in fact did come out several times and even stayed for a while. Not for the past couple of days. Your TPS clue may be worth examining as this may be a compounding of problems too.


#7

And so you might be right and I of course feel dumb: I was a) relying on car’s manual claiming that transmission never needs adding/checking, b) Notwithstanding that advise I was checking transmission fluid when car was turned off and cold and the fluid was in cross-hatch. Well after I checked in when hot I saw that the level was below bottom hole, better yet tiny amount at the tip. I added one quart and looked. The situation improved a bit, then I added another quart and surely engine noise stopped, jerking is less and pull uphill is better. It may look as if I need to add a bit more, for now the fluid is still below the second hole from bottom and certainly below the crosshatch (when hot). So will see what happens. But certainly a good advise… Will see whether it is compuonded with the TPS problem


#8

No pedal comes back O.K. by itself. It may be worth checking the fuel filter as well. But how do you do it without much fancy equipment?


#9

Was the tranny serviced and the fluid level NOT checked afterwards?

If you are losing tranny fluid there has to be a leak somewhere.
Tranny fluid does not evaporate.


#10

Oh, what’s a tranny (fluid). Is it transmission fluid?
The car actually still jerks ocasionaly but not as severely. It even got that rattle and rattling noise in usual situation when I turn and go uphill (going slowly).
So my thinking it was over was to premature…