Question about 1999 Ford F250 Regular Cab

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Idles rough sometimes

F-250 v 10 gas, just started to idle rough, also when stoping sometimes lunges forward, while at stop tries to tack off

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Do a tune up and put some injector cleaner in it

Posted on Nov 25, 2008

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Posted on Jan 02, 2017

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How do you check TPS sensor


That really depends on the car you are trying to check on. The older cars didn't even have a TPS. The best way to see an early indication of the TPS going bad, is how the vehicles is running or responding to your input. First, I suggest putting the vehicle on a diagnostic machine. Go to your nearest Autozone and they will do a check for free. There are 2 indicators that can tell you if you need to replace your TPS, or your IPV.It is easy to confuse the 2 because they kind of do the same thing when your car is running. TPS, or Throttle Positioning Sensor, effects what your throttle does when you depress the accelerator. For example: If your car is idling smoothly and you step on the gas peddle, and the RPM's drop quickly before they rev up. That is a good indication of a bad TPS. IPV, or Idle Positioning Valve, controls your RPM's as the vehicle is idling. If the IPV is bad, then you will experience rough, and fluxuating RPM's when you don't press on the gas peddle. Sometimes, if the IPV is bad, it will cause the vehicle to lunge forward while the vehicle is in gear.

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Feb 04, 2015 | Cars & Trucks

2 Answers

Idles roughly, then low when stopped or in park, then dies. Decreasing gas mileage. Slow to accelerate


Sometimes that's caused by a vacuum leak near the manifold area.

Sometimes air in the coolant will cause an idle problem. Air will keep the air temp sensor from sending proper info.
Hope this helps.

Jan 03, 2014 | 2004 Ford Taurus

1 Answer

My 2001 Dakota has low idle.


Its very likely you have a TCM problem Throttle Controle Module. But be happy if this is it because it is very simple and cheap to fix and replace. It is a little black module (on the drivers side I beleive) on side of the Throttle Body itself held by 2 opposing bolts. easy access and simple. % minutes and your done.

Nov 13, 2013 | Cars & Trucks

1 Answer

I have a 1997 dodge avenger es 2.5 liter here's


Check the vacuum line on the fuel pressure regulator for any sign of gas being sucked into the line. A failed regulator will let extra gas get into the engine. If it's okay, have the fuel pressure checked. That's sure a lot of gas, way too much for the engine. Good luck.

Jan 27, 2012 | 1997 Dodge Avenger

1 Answer

I have a 1997 Ford Escort Wagon and I don't have a problem while I am driving, but when I slow up to a stop. The motor will come to a rough idle when I stop and sometimes the motor will die. I can restart...


try this test
place in neutral with the park brake on
start the engine if it idles alright put your foot on the brake
if it falters or plays up ,it is a vacuum leak in the brake booster
replace the booster

Mar 24, 2017 | 1997 Ford Escort

3 Answers

My 2003 Ford Escort ZX2 has a rough idle, runs great while driving, but tries to die and sometimes does at stops. I cleaned the MAF sensor, it seemed to help a little with the rough idle, could the MAF...


2003 zx2,rough idle when stoped and the car in drive,runs fine on open road,while idleing i opened the hood,when i loosened the oil fill cap i heard a pufffff,like a relief valve,it should not be building pressure should it???dolfo52@comcast.net,please

Aug 31, 2010 | 2003 Ford ZX2

2 Answers

Idle trouble


Check your EGR Valve and your IAC. These can and are usually common problems with bad idle and at sometime your car will be hard to start and when you give it gas it will feel like it almost wants to just lunge forward really fast

May 20, 2009 | 1997 Ford Taurus

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