Low Boost Problem
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Junior User
Joined: Feb 2008
Posts: 90
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From: Goose Creek, SC
Low Boost Problem
I have a 2004 F250 with a 6.0l Diesel. I am having an issue where using a Scan Gauge II, I can't get boost above about 8 psig. This means up to about 1/2 throttle it is ok and anything above that it falls on its face. I have replaced the MAP because it doesn't smoke when floored so I figured she isn't seeing boost. Since that didn't work, I thought maybe the MAF needs cleaning. I unhooked it and realized I can't remove it due to security bolts. I forgot to plug it back in and it boosted to 20 psig and I heard a huge air noise. I can't find a leak and assume the MAF is bad, allowing it boost. If this makes sense, do you recommend a new MAF or try to clean the old one? The real question is, why would it boost with no MAF input but be really low boost with it plugged in?
Thanks
Thanks
Thread Starter
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Junior User
Joined: Feb 2008
Posts: 90
Likes: 1
From: Goose Creek, SC
Doesn't accelerate at all quickly. Stock air filter with little to no d/p across it. Even 5 psig off would put it a normal max of 15 psig vice 25 psig. Anything over 1/2 throttle and it bogs down and has trouble accelerating.
Senior User
Joined: Jun 2012
Posts: 475
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ya good call. Injectors make your boost so make sure theyre getting proper oil pressure. When my turbo would stick, it would roll smoke out exhaust. Might need a good cleaning
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I have a 2004 F250 with a 6.0l Diesel. I am having an issue where using a Scan Gauge II, I can't get boost above about 8 psig. This means up to about 1/2 throttle it is ok and anything above that it falls on its face. I have replaced the MAP because it doesn't smoke when floored so I figured she isn't seeing boost. Since that didn't work, I thought maybe the MAF needs cleaning. I unhooked it and realized I can't remove it due to security bolts. I forgot to plug it back in and it boosted to 20 psig and I heard a huge air noise. I can't find a leak and assume the MAF is bad, allowing it boost. If this makes sense, do you recommend a new MAF or try to clean the old one? The real question is, why would it boost with no MAF input but be really low boost with it plugged in?
Thanks
Thanks
Thread Starter
|
Junior User
Joined: Feb 2008
Posts: 90
Likes: 1
From: Goose Creek, SC
ICP is at 2000 psig with an IPR of 55 to 60 under full throttle. Idling it is an ICP of 630 and an IPR of 23.
I wonder if the MAF is opening the EGR and that is where I am losing boost and why she is nose diving.
I wonder if the MAF is opening the EGR and that is where I am losing boost and why she is nose diving.