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Pickups Dodge Dakota Dodge Dakota throttle position sensor
27 messages, Last post on Feb 22, 2009 at 7:26 PM
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| My Dodge Dakota Sport, 1996 4cyl 2 wheel drive manual air, has a peculiar problem where it intermitently run badly, back firing and bucking like it is running out of gas. The scan said Oxegen sensor. Changed the oxegen sensor and no good. I think it might be the PCM but it is expensive and don't want to waste that much money if it isn't the problem. Any ideals? | |
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HELP...I have had this problem for months. My truck takes moments where it will not idle and say started. I have to keep 1 foot on brake and 1 on gas sometimes to get it going. Sometimes it gets ok after about 15min only this time today it would not stay started at all. I had to work my way to work using neutral and then slide it back to drive. I am thinking the throttle body sensor is either bad or needs adjustments. Please assist if you can. Thank you, JC
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Replying to: txladywolf01 (Dec 05, 2008 10:32 pm) There are a number of things that could cause this problem. I recommend performing some relatively simple checks: *PCV valve - A sticking PCV will cause this problem, and will be especially noticeable in colder weather. If the PCV valve plunger sticks in the closed position, the manifold air flow is effectively reduced. This has the same effect as closing the throttle plate, hence, the engine essentially stalls. In colder weather moisture build up in the motor oil will gravitate to the PCV. In freezing temperatures the moisture around the PCV valve plunger solidifies and cuts off air flow. Look for any signs of moisture in the oil and change it out if necessary. On a vehicle that old and mileage, I would also suggest checking the vacuum hose that goes to the PCV valve. I've seen these get gummed up to the point they no longer flow much vacuum. *Vacuum hoses - Vehicles of this age typically by now have dry, brittle, and cracked vacuum hoses and causing leaks. This may not show up much at higher RPMS or road speeds...although it usually causes slight hesitation or surging...but will definitely cause idling problems. *Sticking Idle Speed Motor - On Throttlebody equiped vehicles, the idle speed is regulated by the Powertrain Control Module (PCM) based on various inputs (sensors) in the system. The PCM then modulates the Idle Speed Motor to open a plunger-type valve that allows more or less air into the manifold to adjust the idle speed. This area is prone to carbon and gum deposits, especially with cheaper fuels. The Idle Speed Motor should be checked and cleaned, especially if you've never done is on this truck before. The Idle Speed Motor is easily removed on Dodge truck motors. *Throttle Position Sensor (TPS) - This is essentially a non-linear potentiometer and can cause idling problems if the voltage is interupted across the terminals. This is caused by a corroded or dirty contact in the sensor. You can check this with a volt-ohm meter, preferably an analog type, by measuring DC resistance across the tap (slider) contact and rotating the TPS shaft. Erratic meter movement indicates a dirty or scratchy resistor. However, because of the miles, I would just change it. *General engine tune - Of course, things like worn spark plugs, old spark plug wires, carbon tracked distributor cap and rotor, clogged air filter, will have a deleterious effect on engine performance and idle quality that may not have been noticeable in the warmer weather. Good luck. Best regards, Dusty
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Replying to: dustyk (Dec 07, 2008 10:58 am) Take care.
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Replying to: babfb (Dec 07, 2008 6:43 pm) Use care when reinstalling the TPS. It is possible to get the TPS engagement socket 180 degrees out. Best regards, Dusty |
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i have a 03 dakota quad with a 3.9 will not idle i have to hold the pedal down to get it warmed up. when i put it in gear it wants to stall if i dont drive with 2 feet. if it does stall it does not want to restart. is this a fuel issue or a throttle sensor problem.
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Replying to: keevine (Jan 16, 2009 8:04 am) Are you in a winter environment? Can you retrieve a trouble code? Regards, Dusty
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Replying to: dustyk (Jan 17, 2009 6:09 am)
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my truck dies when slowing and sputters sometimes but fires back up im out of answers
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Replying to: keevine (Jan 17, 2009 6:58 am) Regards, Dusty
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