Question about 2004 Ford F150
The throttle position sensor [TPS] keeps the engine running when you stop at a light.
it is located under the breather it has a plunger that pushes out against the throttle to keep engine running.
Posted on Nov 13, 2010
Testimonial: "Checked the sensor, found it to be dirty, cleaned it with carb cleaner. Truck runs alot better now. Thanks "
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Posted on Jan 02, 2017
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Here are some of the causes of surges, stalls at stops, slow idle speed, erratic idle speed, rough idle and engine hesitation (and other problems), it is in most cases the idle speed control air-bypass valve and or throttle valve and upper intake, these area's get full of gunk and combustion residue over the miles and cause idle issues (stalls, low idle) like yours, Get a can of intake cleaner from any local parts store, not carb spray, intake cleaner, it is made by a company called CRC, remove the air intake hose to the engine, hold the idle high so the engine won't stall, then spray the can of cleaner into the intake while keeping the engine running, use at least 1/2 the can, shut down the engine and disconnect the battery for 5 minutes, then restart and complete a number of mixed driving cycles, town, freeway, stop and go etc., after a few days the problem will go away as the system will relearn to the clean intake.
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