White/grey smoke at full throttle? - Ford Powerstroke Diesel Forum
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post #1 of 6 Old 02-07-2012, 04:42 PM Thread Starter
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White/grey smoke at full throttle?

Hey guys i have a 1997 f250 7.3 5 spd when you are at full throttle is putting out whitish grey smoke instead of black. What does this mean? Truck has afe intake, ts performance 6pos chip, 3"mbrp down pipe out to 4" exhuast with straight though magnaflow muffler, and banks intercooler.

1997 F250 7.3L ZF5, mbrp 3" dp, 4" straight pipe, ts performance 6 pos chip, afe intake, banks technicooler, and glow shift gauges
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post #2 of 6 Old 02-08-2012, 01:02 AM
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How old is your fuel filter? Thats where id start, Also winter fuel doesnt quite have the kick that summer fuel has

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post #3 of 6 Old 02-08-2012, 05:13 AM Thread Starter
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Originally Posted by kanuck15 View Post
How old is your fuel filter? Thats where id start, Also winter fuel doesnt quite have the kick that summer fuel has
Fuel filter is only two months old with about 1k miles on it. How do you figure there is a difference in fuel between seasons?

1997 F250 7.3L ZF5, mbrp 3" dp, 4" straight pipe, ts performance 6 pos chip, afe intake, banks technicooler, and glow shift gauges
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post #4 of 6 Old 02-08-2012, 05:25 AM
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Its a known fact that they thin down the diesel in the winter for gelling reasons. Thats why in the winter you hear everyone complain about low mileage and whatnot. If the filter is ok Id check the Fuel Pressure Regulator screen next

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post #5 of 6 Old 02-14-2012, 08:22 AM
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Fuel Pressure Regulator (FPR) Screen Writeup

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post #6 of 6 Old 02-14-2012, 07:20 PM Thread Starter
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Originally Posted by elrojo63 View Post
Thanks this is an excellent write up should be a sticky! When I have some free time in the next couple days I am going to try this and see what happens.

1997 F250 7.3L ZF5, mbrp 3" dp, 4" straight pipe, ts performance 6 pos chip, afe intake, banks technicooler, and glow shift gauges
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