Throttle body issues
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6th Gear
Joined: Nov 2022
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Throttle body issues
I have a 1994 F150 with the 5.0l and I’ve been having trouble with what I think is the throttle body getting stuck open when coming to a complete stop.
About a month ago I cleaned the throttle body, removed it and used a throttle body cleaner which stated it was for ford trucks. Replaced everything and still have a idling issue so I ended up replacing both the IAC valve and the throttle body position sensor which seemed to fix the idling issue.
Although now since doing that almost every time I drive the vehicle when I come to a complete stop my truck is trying to pull forward harder than usual and when I let off the brake it jerks forward before I even touch the gas pedal.
I’m not sure if I should clean it again cause I only heard after doing this that ford recommends not cleaning their throttle body’s and should I just get a replacement? Also if this is going to mess up anything else the longer it is going on ?
About a month ago I cleaned the throttle body, removed it and used a throttle body cleaner which stated it was for ford trucks. Replaced everything and still have a idling issue so I ended up replacing both the IAC valve and the throttle body position sensor which seemed to fix the idling issue.
Although now since doing that almost every time I drive the vehicle when I come to a complete stop my truck is trying to pull forward harder than usual and when I let off the brake it jerks forward before I even touch the gas pedal.
I’m not sure if I should clean it again cause I only heard after doing this that ford recommends not cleaning their throttle body’s and should I just get a replacement? Also if this is going to mess up anything else the longer it is going on ?
Lead Driver
Joined: Jun 2021
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I have a 1994 F150 with the 5.0l and I’ve been having trouble with what I think is the throttle body getting stuck open when coming to a complete stop.
About a month ago I cleaned the throttle body, removed it and used a throttle body cleaner which stated it was for ford trucks. Replaced everything and still have a idling issue so I ended up replacing both the IAC valve and the throttle body position sensor which seemed to fix the idling issue.
Although now since doing that almost every time I drive the vehicle when I come to a complete stop my truck is trying to pull forward harder than usual and when I let off the brake it jerks forward before I even touch the gas pedal.
I’m not sure if I should clean it again cause I only heard after doing this that ford recommends not cleaning their throttle body’s and should I just get a replacement? Also if this is going to mess up anything else the longer it is going on ?
About a month ago I cleaned the throttle body, removed it and used a throttle body cleaner which stated it was for ford trucks. Replaced everything and still have a idling issue so I ended up replacing both the IAC valve and the throttle body position sensor which seemed to fix the idling issue.
Although now since doing that almost every time I drive the vehicle when I come to a complete stop my truck is trying to pull forward harder than usual and when I let off the brake it jerks forward before I even touch the gas pedal.
I’m not sure if I should clean it again cause I only heard after doing this that ford recommends not cleaning their throttle body’s and should I just get a replacement? Also if this is going to mess up anything else the longer it is going on ?
Then reattach. operate by hand. return nicely? drive it
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6th Gear
Joined: Nov 2022
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I also know the pedal is not getting stuck because when it first starting happening i would pull up on the pedal to see if it was getting stuck.
If it is the TB binding would it be better to go and clean it again or to buy a new one ? also do you know if its possible to install the throttle body position sensor wrong ?
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6th Gear
Joined: Nov 2022
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Also when I installed the TPS i installed it the way the last one was on but was not sure about the two black tabs and how to line them up properly.
thanks for the help
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Mountain Pass
Joined: Mar 2022
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it must be your stop screw that was touched because surely an iac problem before.
For the tps it seems to me that we can not go wrong to put it, it has only one meaning.
For the tps it seems to me that we can not go wrong to put it, it has only one meaning.
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Actually you can put it on with the sensor tabs on the wrong side of the throttle body tabs. It will not turn when the throttle is opened so the computer does not know how far the throttle has been opened.
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6th Gear
Joined: Nov 2022
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Okay just looked at everything and I can see I def moved the stop screw when I first cleaned the throttle body 🤦🏼♂️. I guess I didn’t see the sticker right next to the screw and this is what I get for that.
I tried to adjust it back to where the marking lined back up but I test drove it and it was still doing the same thing. Would you know how to adjust the stop screw back to the original setting ?
Fleet Mechanic
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From: Candy Mountain
You would also be smart to check the TPS signal as the throttle is moved. If it looks good see if the closed position voltage is different in park versus in gear.
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6th Gear
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I was able to buy a aftermarket tachometer and hook it up to adjust the set screw and it was definitely off by a lot. Enough to where I think someone had messed with it before me but dropping it down to 550 rpm with the iac unplugged seemed to do the trick. Have been driving around all day and the pulling has gone away!
thanks everyone for your help on this thread !
thanks everyone for your help on this thread !
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navigatorstang
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Apr 10, 2011 04:30 PM