Question about 1998 Ford Explorer

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98 5.0 explorer studders between 45and 50mph

Could it be throttle positioning sensor. the throttle has a spot where it is sticky. checked throttle cable and it moves free and clear. so could the sensor be causing that problem to.

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No TP is not the likely cause of this concern. It is most likely either a torque convertor shudder or a skip usually caused by a coil pack,spark plug,or wire. To tell if it Torque Convertor when the concern is present lightly press the brake with your other foot and see if concern goes away. If it continues after doing this then it is most likely ignotion concern.

Posted on Feb 17, 2009

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Could be the throttle blade is sticking (clean with spray cleaner) or cable itself may be sticking. Unhook cable from throttle to see which.

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1991 Volvo 240 won't shift into 3rd til about 60 mph, 4th at 78 mph, shifts into 2nd at 30 mph. think it's the transmission cable loose, any help.

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How do i check the throttle positioning sensor on an 04 Mitsubishi Endeavor to see if it is bad.Service engine light is on. diagnostic tool wont clear the tps high voltage code. I need to know the process...


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My 2001 Toyota Camry will not accelerate. The pedal gives no response to the engine. If I replace the throttle position sensor would that be all I need to look at?

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Sticky throttle pedal sometimes idles high say 2000 rpm have sprayed linkage to no avail,any ideas?

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Sep 14, 2009 | 1997 Chevrolet Blazer

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The car down shifts on it's own. With out moving your foot.

Most probably the Throttle Position Sensor has gone bad or is going bad. Scan for any trouble codes (DTC's) using an OBD!! scan tool. Your XG uses a drive by wire/sensor system called the ETS - Electronic Throttle System. There is a control module which operates the step-motor connected to the throttle plate. The gas pedal you press is cable connected to a sensor called the APS (Accelerator Position Sensor - which could also be the cause of your 'downshift by itself' issue. Both these sensors are simple potentiometers and can wear out and develop bad spots in the wiper plates/contacts.

Sep 05, 2009 | 2001 Hyundai XG300

1 Answer

Sticky throtal (gas pedal)

The simplest thing to check would be check around your gas pedal. What you're looking for is carpet binding or impeding the pedal travel in some manner. I know, it's simple, but it's also the most common.

Secondly, follow the cable coming from the pedal and see it's binding in any way. It'll eventually pass through the firewall under the dash.

If still no luck, then pop the hood and check your cable coming through the firewall. Again you're looking for binding, or it rubbing against something.

If still no luck, check where the throttle cable attaches to the throttle body. It'll actually be what moves the throttle linkage. Have someone push the gas pedal and you see it. You'll probably have a cable coming from the transmission as well going to the same spot. That is, if it's an automatic...can't tell by description. A stick shift won't have a tranny cable.

If you cannot find any binding, then disconnect those cables one by one (easy to do..just carefully pry off the attached piece and then squeeze the large part where it passes through the holding bracket) and squirt a little lubricating oil like Liquid Wrench down each one. Try moving it back and forth and that should free it up.

Definately look at this soon. You do not want that pedal sticking! If it does, immediately shift to neutral and kill the engine. The brakes may not hold it if you leave it in gear. I had a Suburban do this once...and that was one scary ride!! I was only 16 too.

Hopefully this helps. If you do all this you should discover your culprit.

Feb 11, 2009 | 1998 Ford Ranger SuperCab

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