Poor cold weather performance
Lead Driver
Joined: Jun 2013
Posts: 5,648
Likes: 893
From: north of Minneapolis, MN
You may recall, back in the *day* people were installing a resistor on the EOT circuit to fool the PCM into a lower EOT reading...supposed to be a power adder. Well I fell for that trap....and you would get a closing of the EBPV at what were really normal operating temps. I had it partially close pulling a 10k lb horse trailer up a grade...after driving for an hour before that. I got home and pulled that *mod* off.
Lead Driver
Joined: Jun 2004
Posts: 6,359
Likes: 593
From: Amarillo, TEXAS!
Absolutely! I know this one from recording with AE under multiple seasons and conditions... not just in the driveway. The engine is depowered a little (to protect it when cold), the torque converter does not lock, to warm up the transmission faster, and the EBPV engages (sometime full-on, sometimes just a little) to aid with warming the engine faster. The truck is a total dog in icy temps, it was engineered that way to extend the ultimate life of the system.
Cargo Master
Joined: Aug 2009
Posts: 2,137
Likes: 13
From: Glendive, MT
Up here in Montana I filled with 17 gallons of #1 and topped off with #2 fuel. When the temps hit -23, she gelled to the point of quitting. Gelling does not always shut you down completely. I would try adding 16oz of 911 and waiting 15 minutes then try it. If it starts running better, you found the problem. Keep the rest in the bed (in case of spill) where it is handy if it ever happens again.
Cargo Master
Joined: Jan 2009
Posts: 2,800
Likes: 31
From: OKC, OK
Up here in Montana I filled with 17 gallons of #1 and topped off with #2 fuel. When the temps hit -23, she gelled to the point of quitting. Gelling does not always shut you down completely. I would try adding 16oz of 911 and waiting 15 minutes then try it. If it starts running better, you found the problem. Keep the rest in the bed (in case of spill) where it is handy if it ever happens again.
Your truck should not have a problem warming up. I would check the t-stat. If it is not gelled fuel.
Thread Starter
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Tuned
Joined: Jul 2002
Posts: 462
Likes: 5
From: Kansas City, Mo
Thanks for all the responses guys,
Here is what I have done today. Temps were about 18 degrees when I started the truck this morning. Truck started fine (was plugged in). Let it warm about 15 min then drove to store. Trip was about 6-7 miles mostly hwy speeds 60-65 mph. No change in way truck ran from yesterday.
Bought a bottle of 911 and added 8oz to 3/4 tank of fuel. Drove home and still no change.
Checked ICP connection and there was a thin film of oil around the plug. Is this normal? I mean you had to look really hard to see it.
Also before coming home I set the Scan guage to read EOT, IPR, ICP and Boost. EOT only got up to 152. IPR was running 30-35 on hwy. ICP was running 1800-2200 on hwy. Boost was only 1.0 and the highest I could get it to was 2.0 by flooring it.
In the past the truck has always started running right after it completely warmed up 180-190. But never got that high yesterday or today.
Not sure how to proceed from here but open to suggestions. Temps here are supposed to get up into the 40s here on Friday and Saturday. Think I will definitely change the thermostat.
Merry Christmas to all!!!
Here is what I have done today. Temps were about 18 degrees when I started the truck this morning. Truck started fine (was plugged in). Let it warm about 15 min then drove to store. Trip was about 6-7 miles mostly hwy speeds 60-65 mph. No change in way truck ran from yesterday.
Bought a bottle of 911 and added 8oz to 3/4 tank of fuel. Drove home and still no change.
Checked ICP connection and there was a thin film of oil around the plug. Is this normal? I mean you had to look really hard to see it.
Also before coming home I set the Scan guage to read EOT, IPR, ICP and Boost. EOT only got up to 152. IPR was running 30-35 on hwy. ICP was running 1800-2200 on hwy. Boost was only 1.0 and the highest I could get it to was 2.0 by flooring it.
In the past the truck has always started running right after it completely warmed up 180-190. But never got that high yesterday or today.
Not sure how to proceed from here but open to suggestions. Temps here are supposed to get up into the 40s here on Friday and Saturday. Think I will definitely change the thermostat.
Merry Christmas to all!!!
Thread Starter
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Tuned
Joined: Jul 2002
Posts: 462
Likes: 5
From: Kansas City, Mo
I did talk to my buddy yesterday, I was telling him about my troubles with the truck and he said that the thermostat was the original. Could the truck not warming up cause the lack of Boost?"
Is there a way to by-pass the EBPV?
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More Turbo
Joined: May 2006
Posts: 504
Likes: 1
From: Cameron, Ok
Rich, wouldn't you have high boost with a closed epbv? I think it could be more than one issue...maybe bad thermostat and partially clogged fuel supply. The pick up foot commonly breaks off and/or the little screens in the pick up assembly get clogged And the stock quick connects leak air into the fuel stream....that's why these guys recommend the hutch/harpoon mod.
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
EBPV restricts flow out the exhaust... not allowing the turbine to spool up. EBPV closed while driving faceplants the boost.
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