Question about 1999 Ford Expedition
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
Check the pcv vale going in to back of intake it may be broke or has a hole in it .this has happend on quite a few i worked on .this is one of fords better ideals .the part at advance auto parts is 18.00
Posted on Mar 01, 2010
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Oct 22, 2017 | Cars & Trucks
Mar 03, 2012 | 1989 Ford Tempo
Jun 05, 2011 | 2001 Chrysler PT Cruiser
Apr 04, 2011 | 1991 Oldsmobile Cutlass Ciera
Mar 19, 2010 | 2002 Ford Ranger Regular Cab
Aug 08, 2009 | 1995 Chevrolet Blazer
Jun 21, 2009 | 1999 Ford Expedition
Apr 01, 2009 | 2000 Acura TL
257 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: