|
|
|
|
| Author |
|
|
Registered
Join Date: Apr 2010
Posts: 1
|
Little or no boost....
Checked all vacuum lines two were disconnected one at the cycling valve and the other under the throttle body. Thought it would fix the problem, but it did not. When I accelerate 1.3 bar is all I get. Thought the wastegate could be stuck open but before I pull it and risk breaking studs I wanted to see if there were any other options.
|
||
04-11-2010, 05:23 PM
|
|
|
Registered
Join Date: Jul 2009
Posts: 115
|
Ok... the factory boost gauge reads in BAR 1.3 bar is 18.85 psi, sooo what's the problem? Car can't be stock?
|
||
|
04-11-2010, 07:54 PM
|
|
|
Registered
Join Date: Jan 2007
Location: Australia
Posts: 7,917
|
Factory gauge is absolute pressure, so no 1.3b is not 18+lbs.
__________________
In Heaven… the mechanics are German, the chefs are French, the police are British, the lovers are Italian and everything is organized by the Swiss. In Hell…the mechanics are French, the police are German, the chefs are British, the lovers are Swiss and everything is organized by the Italians. |
||
|
04-12-2010, 02:15 AM
|
|
|
Registered
Join Date: Jul 2009
Posts: 115
|
Can you elaborate?
|
||
|
04-12-2010, 05:29 AM
|
|
|
Registered
Join Date: Jul 2009
Posts: 115
|
Can you elaborate please? I don't use the factory gauge.
|
||
|
04-12-2010, 05:33 AM
|
|
|
In the Fires of Hell.....
|
Factory gauge at 1 bar equals ZERO boost.
Factory gauge at 1.3 bar equals 0.3 bars of boost (~5psi). Stock boost is 10 psi, so something's going on. Before taking the WG off, try clamping the hose off going from the cycling valve down to the WG, and CAREFULLY running the car up to boost. Don't go too hard as you have removed all of the safety devices by doing this. If the car boosts higher, then your WG is fine. This of course is assuming that you have the stock WG installed and not some dual port mod. Cheers, Keith
__________________
PCA Instructor: '88 951S - with LBE, Guru chips, 3Bar FPR, 1.3mm shimmed WG, 3120 lbs, 256 RWHP, 15 psig boost |
||
|
04-12-2010, 06:07 AM
|
|
|
|
Registered
Join Date: Feb 2000
Location: Kingsport, TN
Posts: 2,935
|
Check the recycling valve. It's the large black circular thing next to the coolant reservoir. It has a diaphram inside that can break. If it does, you only get about 1.2 to 1.3 on the boost gauge.
To test the valve, remove it and try to blow through either of the large openings. If you can, it's bad. Also, if you can blow through the small opening on top, it's bad.
__________________
Lawrence 1986 951 2002 SLK32 AMG 1987 328GTS 2011 528i |
||
|
04-12-2010, 07:33 AM
|
|
944 Turbo
