Mileage drop off
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Logistics Pro
Joined: Jul 2014
Posts: 4,673
Likes: 531
From: Houston, Texas
Mileage drop off
Y'all know me, I'm prolly delusional, but is there anything that could make my gas mileage plummet? Truck seems to be running fine, just using a lot more fuel. I'm gonna go drill into my reciepts and confirm how much fuel I bought on this trip, but watching the gauge it sure seemed to be sucking my tank.
Cargo Master
Joined: Oct 2003
Posts: 2,833
Likes: 4
From: Jefferson, Iowa
Any codes set? Could be a bunch of things. If not codes are set i would do some sensor cleaning and a tune up. New fuel/oil and air filters, clean the ebp sensor/tube, map sensor/tube, IAT2 sensor and the MAF sensor. Check the ficm voltage at cold start and see what the max boost you can acheive with stock tuning, it should be close to 28 psi. Last I would watch icp desired and icp actual and see if the hpo system can make what the pcm wants.
Senior User
Joined: Sep 2014
Posts: 337
Likes: 0
From: Jasper, Texas
Years ago I killed every mosquito between the Texas state line and the Colorado state line on US 64 in New Mexico. Not to mention I degreased the underside of the truck and the 5er. Turns out the fuel line to the upper filter housing was loose. Probably the last Ford tech to work on it had wimpy arms. Luckily I had the correct wrench with me, tightend it up and I was on my way.
Check the fuel line connections.
Check the fuel line connections.
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xc007
1997 - 2006 Expedition & Navigator
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Jan 24, 2006 09:20 PM
