Question about 1999 Ford Expedition
You have a vacume leak explains all symptoms runs leaner better gas milage listen for hiss look for cracked or broken vac lines
Posted on Jun 21, 2009
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Posted on Jan 02, 2017
SOURCE: engine stalls
The throttle position sensor has a small amount of adjustment in it. The plastic case has a slight slot in it. On the opposite side of the TPS on the air horn you will see a throttle stop with a hard to move screw. You need to get some play on that screw to have slack to adjust the TPS. I think it was good for 100+rpm at base idle.
This may help you, but check you EGR for diaphram and carbon buildup.
Posted on Jun 28, 2009
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