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Old 01-29-2011, 06:34 PM
brherrmann brherrmann is offline
Join Date: Jan 2008
Posts: 14

I have 21"hg at the pump. When I bypass the soleniod I get 21"hg at the wastegate(15"hg if guage is tee tapped at wastegate).I test drove with gauge tee tapped after the solenoid and I get no vacuum reading at any speed/ RPM. I replaced the soleniod with no change. I bench tested both new and old soleniod and both activate at about 8 volts.This is why I'm thinking an electrical issue.
I am still not ruling out a weak vacuum pump as its not making the familiar noise I'm acustomed to. Also the turbo does not whine as noticably when I rev the engine(maybe the turbo is seizing?It still spins.) I am acustomed to 12lbs boost under load (Kennedy chip). Now I'm lucky to get 2lbs.If I bypass the soleniod, I get about 6lbs boost. I put the factory chip back in - no change. Perhaps its time to proceed with my HX35 - I would still like to know whats wrong.
1995 6.5T 4x4 4L80E Trans haules my 5th wheel RV
Rebuilt engine & Tranny at 220000km
DSG gear drive & stud girdle
97 water pump & dual stats
remote FSD
Kennedy fan clutch & Dmax fan
SPA digital gauges - boost, exhaust, trans temp, fuel pressure
Kennedy 3.5" Exhaust & chip
Fluidamper & AFE air filter
Bilstien shocks
remote Amsoil bypass oil filter
marine injectors
31"x12x4" charge air cooler
DSG Oil cooler
B&M transmission pan
Holset HX35W

1988 C2500 6.2 retired with 570000 kms

1997 Jeep TJ with 6.2/6.5 in its future
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