Sudden drop to 12 mpg - Ford Powerstroke Diesel Forum
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post #1 of 12 Old 04-16-2014, 06:00 AM Thread Starter
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Sudden drop to 12 mpg

Help me out guys all of a sudden my truck mpg dropped to 12. I dont beat on it at all probably half city half highway. Replaced my intercooler boots a while back. Kt performance chip, 4" exhaust and 6637 intake. New cps, ICP and IPR. Boost about 19psi and Im in New mExico so my elevation is about 5000ft.

What else can I check?

2000 Ford F-250, Crew Cab Long Bed 4x4, Automatic Transmission, Ts 6 Position, 4" MBRP Exhaust, DIY Intake, Pillar Guages, CCV Mod
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post #2 of 12 Old 04-16-2014, 06:32 AM
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clean/replace the EBP tube and sensor...located in front of hpop, to the left. Tube runs from there to front of p/s manifold

99.5 x-cab 7.3l, 6spd, 161k miles.....
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post #3 of 12 Old 04-16-2014, 06:32 AM
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Maybe it has nothing to do with the engine...

Be sure your rolling resistance isn't the problem. A dragging caliper, low tire pressure, Ft axle engaged, that kind of stuff can have an effect.
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post #4 of 12 Old 04-16-2014, 06:50 AM Thread Starter
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I have only clean the one that runs from the passagener manifold to the center front of the engine. Ill have to look for the other one. Is it pretty easy to spot?
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clean/replace the EBP tube and sensor...located in front of hpop, to the left. Tube runs from there to front of p/s manifold

2000 Ford F-250, Crew Cab Long Bed 4x4, Automatic Transmission, Ts 6 Position, 4" MBRP Exhaust, DIY Intake, Pillar Guages, CCV Mod
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post #5 of 12 Old 04-16-2014, 06:55 AM
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Originally Posted by jdereu View Post
I have only clean the one that runs from the passagener manifold to the center front of the engine. Ill have to look for the other one. Is it pretty easy to spot?
ya, thats the one im referring to.
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post #6 of 12 Old 04-16-2014, 07:00 AM Thread Starter
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Ya I cleaned that one never really clogged or anything to bad. Maybe that sensor is on its way out?

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post #7 of 12 Old 04-16-2014, 07:31 AM
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Are you hearing a hiss from that tailpipe once the engine is warmed-up (indicating the EBPV is restricting exhaust flow)?

What else would make you think this is a EBP issue?
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post #8 of 12 Old 04-16-2014, 07:37 AM Thread Starter
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My ebpv is gutted and remove. I dont think its a EBP issue really. Just taking suggestions

2000 Ford F-250, Crew Cab Long Bed 4x4, Automatic Transmission, Ts 6 Position, 4" MBRP Exhaust, DIY Intake, Pillar Guages, CCV Mod
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post #9 of 12 Old 04-16-2014, 07:59 AM
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Have you changed your fuel filter lately?

Or a bit more exhaust smoke?

Look for (intercooler coupling) boost leaks and look for exhaust up pipe leaks.

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post #10 of 12 Old 04-16-2014, 10:14 AM Thread Starter
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Fuel filter recent yes.

More smoke yes.

How do I check for up pipe leaks
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Originally Posted by hucorey View Post
Have you changed your fuel filter lately?

Or a bit more exhaust smoke?

Look for (intercooler coupling) boost leaks and look for exhaust up pipe leaks.

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2000 Ford F-250, Crew Cab Long Bed 4x4, Automatic Transmission, Ts 6 Position, 4" MBRP Exhaust, DIY Intake, Pillar Guages, CCV Mod
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