No boost or Back pressure.
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Elder User
Joined: Oct 2010
Posts: 701
Likes: 1
From: Western PA
No boost or Back pressure.
I according to a log i ran on my Infinity (ICP, IPR, FIPW, MPG, RPM, VSS, and MAP) Tugly has come to the conclusion I have a problem and suggested I made a new thread asking for help.
Perhaps he can chime in and give some details if needed.
Can anyone help me or lead me in directions as to findingthe source of the problem?
Perhaps he can chime in and give some details if needed.
Can anyone help me or lead me in directions as to findingthe source of the problem?
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
He says he had his EBP disconnected, so I don't have backpressure readings that I would hang my hat on - they are PCM-generated (MAX 11 PSI above BARO). The boost with an 80e tune was anemic. The altitude looks to be 12 PSI, and I never saw the MAP top 20 PSI (8 pounds of boost) with hair-on-fire WOT.
Before we all assume exhaust leaks, I still need to see what the real EBP is (preferably in a stock tune), and hear back if there is soot near the firewall anywhere.
Before we all assume exhaust leaks, I still need to see what the real EBP is (preferably in a stock tune), and hear back if there is soot near the firewall anywhere.
Lead Driver
Joined: Jun 2004
Posts: 6,340
Likes: 588
From: Amarillo, TEXAS!
Before assuming there's a problem with the engine, check the hose that runs from the manifold to the MAP sensor. Remove it and check it for cracks. It's nothing more than a piece of 1/4" hose, so it might be just as well to replace it whether it needs it or not. They do get brittle over time, and should cost less than 5 bucks.
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
We have a new set of data in stock tune. He got up to 14 PSI boost, the HPOP behaved nicely, and the real EBP looked good (albeit just a little low like the boost). I wonder if his wastegate is opening early.
He told me he disconnected the EBPs because he doesn't like the hiss in cold weather.
He told me he disconnected the EBPs because he doesn't like the hiss in cold weather.
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More Turbo
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We have a new set of data in stock tune. He got up to 14 PSI boost, the HPOP behaved nicely, and the real EBP looked good (albeit just a little low like the boost). I wonder if his wastegate is opening early.
He told me he disconnected the EBPs because he doesn't like the hiss in cold weather.
He told me he disconnected the EBPs because he doesn't like the hiss in cold weather.
Doubtful its a wastegate issue. There more or less trouble free. Of course you can unplug it and try that...
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Thread Starter
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Elder User
Joined: Oct 2010
Posts: 701
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From: Western PA
With all the similar sounding sounding sensors and plugs and same name things with alldifferent variations sometimes i get.confused. On the nottom of.the turbo in the middle.there is a clip i unplugged. I saw on here hears ago it was ok to do that. It stooped the sound of the harrier jet on cold mornings. Everyone said it was ok and wouldnt effect anything at all. So i did.
Im not if thats the one you meant or not, but i plugged it back in and then those are new rsults tugly saw.
Im not if thats the one you meant or not, but i plugged it back in and then those are new rsults tugly saw.
Post Fiend
Joined: May 2009
Posts: 5,470
Likes: 3
From: Pea Ridge, AR
With all the similar sounding sounding sensors and plugs and same name things with alldifferent variations sometimes i get.confused. On the nottom of.the turbo in the middle.there is a clip i unplugged. I saw on here hears ago it was ok to do that. It stooped the sound of the harrier jet on cold mornings. Everyone said it was ok and wouldnt effect anything at all. So i did.
Im not if thats the one you meant or not, but i plugged it back in and then those are new rsults tugly saw.
Im not if thats the one you meant or not, but i plugged it back in and then those are new rsults tugly saw.
The EBPS(Sensor) is located at the front of the engine directly in front of the HPOP reservoir and has a tube running down the the front of the passenger side manifold.
Hotshot
Joined: Jan 2011
Posts: 18,849
Likes: 179
From: Puget Sound
OK... that makes more sense, because I was getting readings for EBP with your EBPV disconnected.
That leaves us with seeing if we can get a little more boost out of it (1-3 PSI more) before we call it truck max with a stock tune. I already suggested the red line mod, now I'm going to suggest he clean his IC tubes, spider, and boots. I saw a picture of his intake.
This is where I throw meat to the carnivores: His truck has a CCV mod, and the turbo inlet look "dusty", without being dusted. Maybe the dust was there from some time back, but my thought is CCV vapors in the intake would have prevented the roughing-up of the walls in his CAC system.
Shall I grab popcorn?
That leaves us with seeing if we can get a little more boost out of it (1-3 PSI more) before we call it truck max with a stock tune. I already suggested the red line mod, now I'm going to suggest he clean his IC tubes, spider, and boots. I saw a picture of his intake.
This is where I throw meat to the carnivores: His truck has a CCV mod, and the turbo inlet look "dusty", without being dusted. Maybe the dust was there from some time back, but my thought is CCV vapors in the intake would have prevented the roughing-up of the walls in his CAC system.
Shall I grab popcorn?
