to those with low mpg issues....
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RE: to those with low mpg issues....
ORIGINAL: redrum25
Don't think it will help me much. My truck is only a couple months old with 1300 or so miles.
My current average is just over 11 mpg
Don't think it will help me much. My truck is only a couple months old with 1300 or so miles.
My current average is just over 11 mpg
Unfortunately, redrum, 2500s (3/4 ton trucks) don't get the fuel economy of the 1500's. No MDS (don't feel bad, my 04 - 1500 doesn't have it either, and I don't want it), more weight from the frame, bigger axles (we don't even have a front axle - and believe me, I'd give up a couple MPG's for a solid front axle) are the biggest reason's.
What you have over a 1500 in frame & suspension strength, costs you fuel economy. From past input I've heard from 2500 Hemi owners, you're about right on in the mpg department. You may pick up another mpg as it continues to break in...
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RE: to those with low mpg issues....
If your throttle body is getting dirty, than your air filter isn't doing it's job. Either you need to change the air filter more often (This too can increase MPG), or if you have an aftermarket cotton gause filter, than it is passing way too much dirt! Prehaps from not oiling properly, or a poor quality filter.
If dirt is getting into the TB, than its also getting into the engine, which can cause build up in the combustion chamber, scratching of the poston and cylinder walls, etc.
-ThaChad
If dirt is getting into the TB, than its also getting into the engine, which can cause build up in the combustion chamber, scratching of the poston and cylinder walls, etc.
-ThaChad
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Joined: Jul 2007
Posts: 24,686
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From: South Georgia/East Florida
RE: to those with low mpg issues....
ORIGINAL: ThaChad
If your throttle body is getting dirty, than your air filter isn't doing it's job. Either you need to change the air filter more often (This too can increase MPG), or if you have an aftermarket cotton gause filter, than it is passing way too much dirt! Prehaps from not oiling properly, or a poor quality filter.
If dirt is getting into the TB, than its also getting into the engine, which can cause build up in the combustion chamber, scratching of the poston and cylinder walls, etc.
-ThaChad
If your throttle body is getting dirty, than your air filter isn't doing it's job. Either you need to change the air filter more often (This too can increase MPG), or if you have an aftermarket cotton gause filter, than it is passing way too much dirt! Prehaps from not oiling properly, or a poor quality filter.
If dirt is getting into the TB, than its also getting into the engine, which can cause build up in the combustion chamber, scratching of the poston and cylinder walls, etc.
-ThaChad
So, with your theory (which I normally would agree with) you'd have to change the air filter at 3k miles when you do the engine oil & filter. And I'm not so sure that at that, you still not have to clean the TB.
So, I'd say, yes replace that filter more often (or clean it more often than the recommended intervals if it's a cleanable one) but still check that TB out and clean it when it's gunked up, if you want optimum MPG's...
RE: to those with low mpg issues....
Is this a recurring problem on the 4.7L as well? I may have to take a peek at mine! My MPG went down to about 12 the last few months. Probably a combination of 4X4 and my new tires. I never got better than 14 though.
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RE: to those with low mpg issues....
ORIGINAL: HammerZ71
Sounds like good advice, but it isn't that simple. There is actually a Chrysler TSB out on the subject. All Hemi's seem to get more dirt in the TB faster than any other engine on the planet. The first I learned of this, I checked mine while the whole intake system was still factory and the truck had a little over 6,000 miles on it. The TB was already gunked up a good bit. Since the addition of my CAI you'd think it would gunk up more and faster because it's sucking more air, but that's not the case, it's about the same.
So, with your theory (which I normally would agree with) you'd have to change the air filter at 3k miles when you do the engine oil & filter. And I'm not so sure that at that, you still not have to clean the TB.
So, I'd say, yes replace that filter more often (or clean it more often than the recommended intervals if it's a cleanable one) but still check that TB out and clean it when it's gunked up, if you want optimum MPG's...
Sounds like good advice, but it isn't that simple. There is actually a Chrysler TSB out on the subject. All Hemi's seem to get more dirt in the TB faster than any other engine on the planet. The first I learned of this, I checked mine while the whole intake system was still factory and the truck had a little over 6,000 miles on it. The TB was already gunked up a good bit. Since the addition of my CAI you'd think it would gunk up more and faster because it's sucking more air, but that's not the case, it's about the same.
So, with your theory (which I normally would agree with) you'd have to change the air filter at 3k miles when you do the engine oil & filter. And I'm not so sure that at that, you still not have to clean the TB.
So, I'd say, yes replace that filter more often (or clean it more often than the recommended intervals if it's a cleanable one) but still check that TB out and clean it when it's gunked up, if you want optimum MPG's...
That begs the question... Where's the dirt coming from? Is it dirt?
-ThaChad
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RE: to those with low mpg issues....