Poor MPG problem, Part 2
Thread Starter
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Mudding
Joined: Mar 2016
Posts: 182
Likes: 15
From: Morgantown, WV
The entire exhaust system from the manifolds back has only 25k miles on them.
TReK
Joined: Mar 2010
Posts: 2,776
Likes: 623
From: NYC
from the "what have you done lately" thread....
Given the pressurization in your tank I'd take a look at this.
Pulled every evap line and filler neck out of the truck from the engine bay back to find a leak. Found it at the filler neck. This leak caused me to have rough idle and bad short and long term fuel trims.
One thing I would like to add if you have not looked at your lines back there you need too. The rubber vent hose and filler hose will be cracked and soon start leaking and cause air to enter you system and cause rough idle and cut down on your MPG's.
One thing I would like to add if you have not looked at your lines back there you need too. The rubber vent hose and filler hose will be cracked and soon start leaking and cause air to enter you system and cause rough idle and cut down on your MPG's.
Camel Trophy
Joined: Jan 2010
Posts: 4,245
Likes: 402
From: Traverse City MI
If it was a Ferrari you wouldn't think twice about doing it...... I'm just as guilty, my current project I have to do the same thing because I smell fuel vapors when it's parked in the garage...... and I have to R&R the entire rear suspension with new and break out the welder so in goes a new fuel pump/strainer and all hoses while it's out. My summer is gone already and I haven't even bought the Callaway P38 yet. That's another project........ trans and BeCM rework.
Thread Starter
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Mudding
Joined: Mar 2016
Posts: 182
Likes: 15
From: Morgantown, WV
Of course you're right. And I'll add it to the list. I think I'll test the injectors first though - a bit easier. Far as I understand it I don't need any gaskets, correct? Just disconnect some hoses, etc, then remove the plenum and can then access the injectors?
Thread Starter
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Mudding
Joined: Mar 2016
Posts: 182
Likes: 15
From: Morgantown, WV
So I pulled almost 12 mpg on a round trip this weekend, except I was hauling a motorcycle and trailer.
My LTFT started at 2.3. Dropped to 1.6 and then dropped to 0.8. It was still at 0.8 this morning.
No clue at this point. No clue. I'm kinda happy with 12 mpg pulling a trailer, though that's not all that great it's what I pull normally without a trailer.
My LTFT started at 2.3. Dropped to 1.6 and then dropped to 0.8. It was still at 0.8 this morning.
No clue at this point. No clue. I'm kinda happy with 12 mpg pulling a trailer, though that's not all that great it's what I pull normally without a trailer.
Winching
Joined: Feb 2010
Posts: 554
Likes: 59
From: Burlington, NC
I pulled my plenum off to change out the screens on my injectors. The plenum had gray permatex on it, do i need to re-apply permatex when i reassemble?
Camel Trophy
Joined: Jan 2010
Posts: 4,245
Likes: 402
From: Traverse City MI
So I pulled almost 12 mpg on a round trip this weekend, except I was hauling a motorcycle and trailer.
My LTFT started at 2.3. Dropped to 1.6 and then dropped to 0.8. It was still at 0.8 this morning.
No clue at this point. No clue. I'm kinda happy with 12 mpg pulling a trailer, though that's not all that great it's what I pull normally without a trailer.
My LTFT started at 2.3. Dropped to 1.6 and then dropped to 0.8. It was still at 0.8 this morning.
No clue at this point. No clue. I'm kinda happy with 12 mpg pulling a trailer, though that's not all that great it's what I pull normally without a trailer.