You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an alternative browser.
You should upgrade or use an alternative browser.
Loosing boost after taking off intercooler?
- Thread starter Sierra117
- Start date
detsilverms3
Member
- :
- 08 Speed 3
The OEM is still on it, so your saying take it off, shake it, and stick it back on?
you need to do the old nintendo fix. just blow on it a few times and pop it back in. lol.
This is what I posted on another forum, seeing if this will help any of you all out see anything I am missing:
1. Saturday night, work on trying to get the HKS SSQV installed with Brandon and Sumo. No go. Decide to call it quits and go meet up with some friends. On the way to meet up, I notice the car feels slower by a good margin. Hop on the tollway, 4th gear at 60 up to 115 when I let off. Spiked quickly to 11 pounds of boost, held about 9 pounds the rest of the time. Obviously a boost leak, no biggy, probably a hose didn't get tightend.
2. Driving home from my friend's place, Saturday night, notice something interesting. Very clear fluttering sound, on the stock BPV. Ok, definate issue there. Maybe more than a boost leak. Get home, park it, and decide to handle it in the morning (it was about 330am at this time).
3. Sunday, make a quick run to Autozone to get snap ring pliers and some other tools, get back home get to work. Intercooler comes off, play around with HKS some more, still cant get her on. Reset ECU at this time as well. Intercooler goes back on, re-attach and tighten everything, take her out for a spin. Boost is still spiking to eleven, holding 9-10 pounds. But flutter is gone. Ok.
4. Monday morning on the way into work. Everything is gravy again. Spiking 17 pounds, holding 15. Wahoo. I fixed it.
5. Monday around noon, need to run to get gas and lunch. Uh oh. Spiking 14 pounds, holding 12.
6. Test it out Monday after work, still the same. Remains in this condition all through Tuesday.
7. Today at lunch, go out for another set of pulls. First two sets of pulls, spike 16, hold 14. Ok, so its not 15 pounds, but maybe its just the ECU getting recalibrated or some such issue. Do one more pull, and its back to no more than 12 pounds. I procede to do a good bunch of pulls down the Dub, and this is what I've determined:
-From 4th gear, 60mph up to ~115-120, spikes to 13 pounds, holds 12 pounds, tappers off to 11
-From 4th gear, 40mph up to ~115, spikes to 15, holds 13, tappers off to 11
-From a dead stop, never higher than 13, pretty much holds 12 pounds
-At idle, vaccum is between -20pounds and -14pounds, staying mostly in the -17 range
So I'm thinking its not the ECU, its gotta be a leak somewhere. I checked the two boost tubes, and both of them seemed nice and tight and secure. It has been suggested that the inlet tube from the intake to the turbo may be loose. Checked it out, seems fine and tight to me. So I'm thinking the stock BPV may be stuck open, I'm wrong about the inlet tube, or one of the boost tubes was damaged when taking off and putting the intercooler back on. Any other suggestions/tests I could do to check for a leak?
1. Saturday night, work on trying to get the HKS SSQV installed with Brandon and Sumo. No go. Decide to call it quits and go meet up with some friends. On the way to meet up, I notice the car feels slower by a good margin. Hop on the tollway, 4th gear at 60 up to 115 when I let off. Spiked quickly to 11 pounds of boost, held about 9 pounds the rest of the time. Obviously a boost leak, no biggy, probably a hose didn't get tightend.
2. Driving home from my friend's place, Saturday night, notice something interesting. Very clear fluttering sound, on the stock BPV. Ok, definate issue there. Maybe more than a boost leak. Get home, park it, and decide to handle it in the morning (it was about 330am at this time).
3. Sunday, make a quick run to Autozone to get snap ring pliers and some other tools, get back home get to work. Intercooler comes off, play around with HKS some more, still cant get her on. Reset ECU at this time as well. Intercooler goes back on, re-attach and tighten everything, take her out for a spin. Boost is still spiking to eleven, holding 9-10 pounds. But flutter is gone. Ok.
4. Monday morning on the way into work. Everything is gravy again. Spiking 17 pounds, holding 15. Wahoo. I fixed it.
5. Monday around noon, need to run to get gas and lunch. Uh oh. Spiking 14 pounds, holding 12.
6. Test it out Monday after work, still the same. Remains in this condition all through Tuesday.
7. Today at lunch, go out for another set of pulls. First two sets of pulls, spike 16, hold 14. Ok, so its not 15 pounds, but maybe its just the ECU getting recalibrated or some such issue. Do one more pull, and its back to no more than 12 pounds. I procede to do a good bunch of pulls down the Dub, and this is what I've determined:
-From 4th gear, 60mph up to ~115-120, spikes to 13 pounds, holds 12 pounds, tappers off to 11
-From 4th gear, 40mph up to ~115, spikes to 15, holds 13, tappers off to 11
-From a dead stop, never higher than 13, pretty much holds 12 pounds
-At idle, vaccum is between -20pounds and -14pounds, staying mostly in the -17 range
So I'm thinking its not the ECU, its gotta be a leak somewhere. I checked the two boost tubes, and both of them seemed nice and tight and secure. It has been suggested that the inlet tube from the intake to the turbo may be loose. Checked it out, seems fine and tight to me. So I'm thinking the stock BPV may be stuck open, I'm wrong about the inlet tube, or one of the boost tubes was damaged when taking off and putting the intercooler back on. Any other suggestions/tests I could do to check for a leak?
Is it possible you lost the gasket for the stock BPV? I lost mine and didn't notice it but the car felt slow. It can fall out quite easily, I never saw it. I made a temporary gasket out of an O-ring and ordered 2 replacements. The gasket is a little floppy thing that goes in a groove in the bottom of the BPV flange.
Nope, the O-ring is still there.
This isn't good, what else can it be?
Last edited:
Is it possible you lost the gasket for the stock BPV? I lost mine and didn't notice it but the car felt slow. It can fall out quite easily, I never saw it. I made a temporary gasket out of an O-ring and ordered 2 replacements. The gasket is a little floppy thing that goes in a groove in the bottom of the BPV flange.
wow i didnt even see a gasket on the stocker, i thought it was a little strange to not have one. i would say get your HKS together and put it on and see if you still have a leak. that would atleast eliminate one possible problem.
I am almost 99.9% certain that it is indeed the valve. This morning it was back to fluttering after trying to work with it some more yesterday. That means, in my rudementry knowledge of forced induction cars, that it is either lacking enough vaccum to open the valve, or the valve itself is in someway just not opening enough, or staying open and leaking air. I would work harder to get the HKS working, but I'm getting the hook up on the Synchronic Synapse, and will be selling the HKS.
- :
- 2002 BJFW, 2007 BK3P, 1979 SA22C, 2005 BK3P
we had this exact same problem doing a downpipe install. the turboxs valve the customer had became stuck open upon reinstall and the car would never exceed 9psi. he put the stock valve back on and problem solved.
- :
- 2002 BJFW, 2007 BK3P, 1979 SA22C, 2005 BK3P
Last time...
THE STOCK VALVE IS ON
I think I may have solved the problem, I'll check out my solution in the morning and go from there.
i read that, i am just relating what happened to us
Your stock valve is done bro... get a Forge and call it done.
I am getting a new valve, just not a Forge. Until then, I'm just trying to figure out how my stock valve could go from 100% fine to not holding more than 10 pounds in one day...I think I may have part of it figured out, it looks like the vacuum line is all crinkled up. Gonna reroute it and see how it goes.
But your right, or at least I'm positive you are. The clamps on the intercooler hoses are all solid tight, and I checked over the hoses, no cracks or anything. It has to be the valve.
With your stock valve, did you drop off bost real fast past 5000rpm? And I'm holding 14.8 pounds for the most part? So I still think I'm loosing a bit, or is the stock boost not 15 pounds?
Yes, back when I was stock I did. Boost drops alot at the top end, unfortunately that's normal behavior.
New Posts and Comments
- Replies
- 7
- Views
- 209
- Replies
- 10K
- Views
- 2M
- Replies
- 5
- Views
- 475