HORRID MPG
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Cargo Master
Joined: Dec 2011
Posts: 2,750
Likes: 4
From: Pecatonica, IL
HORRID MPG
Hey everyone,
Been driving my Ranger around for a couple of months, and I'm noticing my MPG's are absolutly horrid. I was around 10 the last couple of tanks, and this last one was 8.7MPG. I'm not driving it hard, only things is its been cold, and I have been driving with the hubs locked. I'm not expecting 30 or anything, but 15 at least would be nice.
Quick specs: 4.0L, A4LD, 4x4 w/manual lockouts, Slightly bigger tires (235/75/15's) No lift... My F-250 7.3 Diesel gets better mileage than this thing, but that was the whole point so I could park that this winter and keep the salt off of it (Rust free southern truck)
Anyone have an idea? Doesn't run rough like it needs a tune up, No CE light. I'm at a loss. This thing is eating me out of house and home on fuel. Please help!
Been driving my Ranger around for a couple of months, and I'm noticing my MPG's are absolutly horrid. I was around 10 the last couple of tanks, and this last one was 8.7MPG. I'm not driving it hard, only things is its been cold, and I have been driving with the hubs locked. I'm not expecting 30 or anything, but 15 at least would be nice.
Quick specs: 4.0L, A4LD, 4x4 w/manual lockouts, Slightly bigger tires (235/75/15's) No lift... My F-250 7.3 Diesel gets better mileage than this thing, but that was the whole point so I could park that this winter and keep the salt off of it (Rust free southern truck)
Anyone have an idea? Doesn't run rough like it needs a tune up, No CE light. I'm at a loss. This thing is eating me out of house and home on fuel. Please help!
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
What condition are the front drive components in? If everything is new and well greased there should be no noise or vibration evident with the front end engaged and no noticable additional drag, if there is then the front end needs service. That said unlock the front hubs unless needed and especially when travelling at highway speeds.
What kind of driving are you doing? Is it all short hops in town or is it more typical with plenty of time for the engine to get fully warmed up and into closed loop?
Even if the CE light hasn't been on check for codes. If the O2 sensor looks original or is obviously pretty old change it out.. codes or not, these things will drift off target with age but remain functional.
What kind of driving are you doing? Is it all short hops in town or is it more typical with plenty of time for the engine to get fully warmed up and into closed loop?
Even if the CE light hasn't been on check for codes. If the O2 sensor looks original or is obviously pretty old change it out.. codes or not, these things will drift off target with age but remain functional.
Thread Starter
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Cargo Master
Joined: Dec 2011
Posts: 2,750
Likes: 4
From: Pecatonica, IL
I do get a rotten egg odor out of the exhaust from time to time, but I can't remember if thats rich or lean. Yeah I'm now thinking 02 sensor. I'll give that a shot and see where we go from there. I do have access to a scanner, what could I be looking for?
FTE Legend
Joined: Jun 2006
Posts: 31,930
Likes: 1,499
From: Ottawa, Ontario
A modern OBD2 scanner won't do you any good on this old OBD1 truck, you need a basic code reader like the Equus 3145 for that. Any codes are bad but codes for EGR, TPS, or the MAP sensor can put the computer in open loop mode which will definitely hurt fuel milage.
Also note code reading should be performed when the engine is at operating temp to prevent false temp sensor codes.
Also note code reading should be performed when the engine is at operating temp to prevent false temp sensor codes.
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