cold weather turbo boost problem 6.4 - Ford Powerstroke Diesel Forum
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post #1 of 2 Old 01-07-2014, 04:55 AM Thread Starter Rookie
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cold weather turbo boost problem 6.4

Driving this morning truck was running fine. air temp is about -12 F. Boost went up to about 30psi with not a lot of throttle. Let off the throttle and it made a "whoop hoop whoop" sound like it does when you get on the throttle and have to quick let off. After that I get hardly no psi regardless of throttle. When I back off the throttle boost on my Spartan dashdaq drops to -0.3 or so. Fuel looks good, no gelling that I could see. Could the turbos freeze up or could something be frozen causing no boost???
The truck was in a heated garage all night and got a quick rinse to get the salt off.
Spartan tuner
ERG and DPF delete
S&B intake.
MBRP 4" turbo back SS exhaust

Last edited by 875superduty; 01-07-2014 at 05:07 AM.
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post #2 of 2 Old 01-07-2014, 05:39 AM
Yeah it's a Turbo Diesel
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Many threads on this topic... It's your EBP tube freezing up causing the over boosting. Do a search and you'll find some remedies other 6.4 members are finding effective

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