Fuel Mileage?????? - Ford Powerstroke Diesel Forum
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post #1 of 33 Old 07-31-2014, 08:45 PM Thread Starter
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Fuel Mileage??????

Okay, I know another fuel mileage issue

I picked up a 2001 with 224K, so far I've changed all the fluids and filter's, and have been running Diesel Kleen and 2 stroke oil on every fill up.

I've also cleaned the EBPV tube and sensor, replaced the leaky ICP.

The truck is a CCSRW 4X4 with no lift, running a 285/75R16 tire. I've put almost 2K on the truck and it seems like the better it is running,but the mileage is dropping off, I'm getting in the high 13mpg range but when I first got her she was getting around 14.5-15.1mpg (hand calculated) I plan on having the tank filters cleaned but on my 2000 truck it didn't help with the mileage but it did help wake her up.

Any idea's????

Almost forgot, not a puff of smoke at start up or when driving, even under hard acceleration

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Last edited by hansel; 07-31-2014 at 08:48 PM.
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post #2 of 33 Old 07-31-2014, 08:53 PM
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how is your atf looking?
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post #3 of 33 Old 07-31-2014, 09:09 PM Thread Starter
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Quote:
Originally Posted by steve604 View Post
how is your atf looking?
It is brand new now, but was questionable when I changed it

It doesn't feel like it's slipping, the truck is running much better than when I bought it, just seems the better it's running the worse the mileage has gotten, and I can't afford too start changing allot of stuff.

Would a stock exhaust be my problem??? I have a Airaid intake on it, but the exhaust is all stock.

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ISSPRO EGT/Transmission
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post #4 of 33 Old 07-31-2014, 11:38 PM
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Tuner, intake and exhaust bumped me up from 16mpg to 21-22 on the highway, same year truck. I also seem to feel like DieselKleen has always given me worse fuel mileage, so I stopped using it regularly.

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post #5 of 33 Old 08-01-2014, 01:36 AM
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good point, maybe try running without additives for a couple of tanks.

the fuel systems in our trucks don't really need much attention. according to what i've read from injector rebuilders, the fuel side of the injectors seem to last for ever, it's the oil side of them that sucks.
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post #6 of 33 Old 08-01-2014, 06:52 AM Thread Starter
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Quote:
Originally Posted by steve604 View Post
good point, maybe try running without additives for a couple of tanks.

the fuel systems in our trucks don't really need much attention. according to what i've read from injector rebuilders, the fuel side of the injectors seem to last for ever, it's the oil side of them that sucks.
Okay, I will leave out the diesel kleen and see what happens, I will keep up on the 2 stroke for some lubrication, my old truck and this seem too love 2 stroke oil

The reason for adding the DK was the PO probably did nothing for fuel additive

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post #7 of 33 Old 08-01-2014, 06:57 AM
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ulsd is rough on the o-rings...other than adding something every once in a great while I dont touch it. And on any turbo something (car or truck) more free flowing is always better...

oh and atf that is old is usually stiff and so when you changed it (better for the truck) the trans "slips" more like it is designed.

What this nation needs is cleaner thoughts and dirtier fingernails...
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post #8 of 33 Old 08-01-2014, 08:16 AM
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Still on original injectors?

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post #9 of 33 Old 08-01-2014, 09:15 AM
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you could cut the muffler off and see if it helps at all. thats free after all

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post #10 of 33 Old 08-01-2014, 07:04 PM Thread Starter
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Quote:
Originally Posted by Jerrybizzle View Post
Still on original injectors?
Ya, still the original injector's but I knew when I bought it they might need some attention. I didn't think that the same day I bought it my son would total his truck, and then have too replace my daughters car

So I need to nurse them for awhile

2001 7.3L CCSRW 4X4
Airiad Intake 4" Flo-Pro Exhaust
ISSPRO EGT/Transmission
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