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Registered
Join Date: Jul 2009
Location: Cape Coral, Florida
Posts: 97
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Control Pressures Check Help
I just completed my first control pressure check.
I do not have any manuals could I get some help checking procedure and the numbers I came up with. Thanks
1988 930
WUR 0438140 153
Temp 31C 88F (eng compartment)
Disconnected 2 pole plug at mixture control unit (blue)
Turned pumps on
Bled air from line, pumps back off
THE TEST
Dead cold
Valve closed 6.8 b Turned pumps off
opened valve 3.4 b
Pumps on 3.7 b Turned pumps off
10 min check 1.7 b
20 min check 1.7 b
Pumps on, WUR plugged in 3.2 b
30 sec 3.4 b
1 min 3.7 b
1:30 3.9 b
2 min 4.0 b no more changes
Pumps off 2.8 b
10 min 1.7 b
20 min 1.7 b
Re-Connected 2 pole plug at mixture control unit (blue)
Started engine 4.0 b
Operating Temp 4.1 b
Engine off 3.0 b
10 min 2.9 b
20 min 2.2 b
Thanks in advance
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1981 911SC
1988 930
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