Boost??
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Senior User
Joined: Jan 2011
Posts: 109
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From: Central Valley, CA
Boost??
Was wondering if it is normal for the truck to make more boost when the truck is at operating temperature? My drive in the morning is pretty short and even with a warm up prior to driving the truck rarely gets in the normal range on the gauge. This after non while driving around town and with the truck nice and warm the boost was consistently higher throughout all shifts and driving speeds. Recognize this is a mostly stock truck and seams to mostly run under 5psi around town and sometimes higher on taking off from a stop. Is this normal, I just installed the gauges this past weekend.
Thanks
Thanks
Post Fiend
Joined: Jun 2004
Posts: 9,293
Likes: 10
From: Parker, CO
Yep, normal.
Fueling, timing, and ICP are adjusted by the PCM when the engine is cold. It's just part of the stock Ford programming.
In addition, if your truck is mostly stock, then your EBPV (exhaust back pressure valve) is probably functioning and working as it should to restrict the exhaust flow... which will cause less power and lower boost pressures, but warm the engine faster.
Fueling, timing, and ICP are adjusted by the PCM when the engine is cold. It's just part of the stock Ford programming.
In addition, if your truck is mostly stock, then your EBPV (exhaust back pressure valve) is probably functioning and working as it should to restrict the exhaust flow... which will cause less power and lower boost pressures, but warm the engine faster.
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Senior User
Joined: Jan 2011
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From: Central Valley, CA
Thanks for the quick answer. This is what I had thought but I am still very new to PSD; trying to learn all I can. I would like to remove all the EBPV stuff some day but have no real reason to get into the turbo at the moment.
Posting Guru
Joined: Dec 2010
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From: Boston, MA
delete the thing then good luck to ya brother
Post Fiend
Joined: Jun 2004
Posts: 9,293
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From: Parker, CO
I deleted my EBPV a few years ago. It was more annoying than useful in cold weather.
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Post Fiend
Joined: Jun 2004
Posts: 9,293
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From: Parker, CO
My exhaust backpressure sensor tube kept getting clogged. As a result, the sensor couldn't read backpressure, and the EBPV wouldn't disengage when I hit the accelerator. It wasn't fun having a top speed of 20 mph. That and I really didn't like having to maintain keeping the sensor tube clean, so I disabled the EBPV. Later I found a great deal on an EBPV delete outlet and turbo pedestal and made the swap.
Also with a 4" exhaust the EBPV gets pretty loud in the driveway. I'm sure my neighbors didn't like me much when I cranked the truck up in the early AM hours.
Also with a 4" exhaust the EBPV gets pretty loud in the driveway. I'm sure my neighbors didn't like me much when I cranked the truck up in the early AM hours.
Hotshot
Joined: Jul 2008
Posts: 12,782
Likes: 2,142
From: N.GA Mountains
I like the fast warm-ups with EBPV. It will even close after truck has idled for a bit in REALLY cold weather - keeping combustion chamber temps up for a good burn, and keeping my toes warm too! (it is pretty loud with a straight pipe)
I have to admit, it never activated the whole time I lived in FL.
I have to admit, it never activated the whole time I lived in FL.
Senior User
Joined: Oct 2010
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From: Bloomington
Really can't tell any difference in warm up times with mine. Been below zero hear lately. Truck has always been slow to warm up, but that's normal. Gas mileage is better with it disabled, not choking my truck for the first 5min of driving anymore!
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Senior User
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From: Central Valley, CA
Sense this thread stated the other day I have been thinking with my short drive to work and warm up I am wondering if I can pick up some mpg with it off instead of coming on and off like I guess they do while you drive? It has been in the 30’s here in the mornings (I know warm compared to the rest of the county). I usually let the truck warm up for 3-5 minutes while I go back in the house and get coffee and finish getting ready for work. Do you think I would see any improvement in gas mileage or maybe drivability when it is disconnected and cold?