Godbless our soldiers!
I'm about to start my annual maintenance and I was out cruising the other day...I noticed that my AFRs were way too high the higher boost I would try to run, so I always start with doing a boost leak test.
I have my boost tester connected to the turbo inlet pipe and have the oil cap off. The problem is, and I want to make sure I'm not missing anything, is I can't even build 5 psi of air pressure to check....I've visually checked all the couplings, even the turkey neck/connector for the intake, and everything appears fine. I think I hear air coming from under the intake, but of course, I can't feed enough air. Again, I see the connector to the intake, I see the connections from the hoses to the idle control valve, and hose from the ICV to my CES elbow....
Before I remove the intake manifold and check the actual hoses, am I doing something incorrect to build more pressure? The valve cover has a hose that vents to atmosphere....I haven't had this issue before and I would expect a major/obvious leak in this scenario, but I don't see one.
1997 Arctic Silver/Black M3
CES Stage IV (651rwhp/615rwtq @ 24 psi)
1999 Techno Violet/Dove M3
Auto/Convertible and staying stock!
LICENSE SUSPENDED
You will need a decent compressor to be able to test properly. There will be valves open and you need to keep a constant flow of air.
1996 332IS
Built 3.2
CES/Steed TS Precision 6466, spraying a "$π!℅" load of meth.
Technique Tuning 80# tune.
1/4 mile 10.84 @ 136.72
Your 1 and only stop for all your BMW performance needs
WWW.CESMOTORSPORT.COM
Godbless our soldiers!
Thats the thing, I have done with the same compressor and did 20 psi....if I cant get it to work or find the leak, I will have a shop try
LICENSE SUSPENDED
If you did it with the same compressor, then get a spray bottle with soapy water and pray the whole system down with as much as you can put at it. You have over the subframe hot pipe ?Originally Posted by BMWManiac
1996 332IS
Built 3.2
CES/Steed TS Precision 6466, spraying a "$π!℅" load of meth.
Technique Tuning 80# tune.
1/4 mile 10.84 @ 136.72
Your 1 and only stop for all your BMW performance needs
WWW.CESMOTORSPORT.COM
Godbless our soldiers!
When you say hot pipe, you're talking about the one from the turbo outlet to intercooler? No, it is below the subframe
1997 Arctic Silver/Black M3
CES Stage IV (651rwhp/615rwtq @ 24 psi)
1999 Techno Violet/Dove M3
Auto/Convertible and staying stock!
Godbless our soldiers!
Should I try rotating the engine slightly to perhaps see if there is a difference?
1997 Arctic Silver/Black M3
CES Stage IV (651rwhp/615rwtq @ 24 psi)
1999 Techno Violet/Dove M3
Auto/Convertible and staying stock!
Member
Yes. Sometimes with cam overlap you have a cylinder completely open. Usually I rotate the motor slightly and it works.
Attention TURBO LOVERS, Great book -----> How to turbocharge and Tune your Engine
Favorite Automotive Tuning Articles on the Internet: Engine Tuning Articles
My Car: Custom Build Lotus Super 7
Godbless our soldiers!
Where does the vac line from the FPR connect to? The intake manifold? Guess what I found flopping around the engine bay
1997 Arctic Silver/Black M3
CES Stage IV (651rwhp/615rwtq @ 24 psi)
1999 Techno Violet/Dove M3
Auto/Convertible and staying stock!
Member
If it's obd1 than there is a nipple on the under side of the firewall side of the intake manifold that it plugs into. If it's obd2, I'm not sure.
Godbless our soldiers!
Yup, that was it....vac tested again and its good....lean condition resolved!
1997 Arctic Silver/Black M3
CES Stage IV (651rwhp/615rwtq @ 24 psi)
1999 Techno Violet/Dove M3
Auto/Convertible and staying stock!
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