DIC boost gauge not showing boost..

[SaturdaysGS]

What are the possible causes of the boost gauge on the DIC not showing any boost? MAP sensor?

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[b4black]

Could be. Put a scan tool on it and see what the MAP sensor is reading.

And check the black vacuum lines that run from the MAP, LIM, FPR and boost solenoid. The T to the LIM (under the SC snout) like to split over time.

 

[SaturdaysGS]

Vacuum lines look good. Hooked up a Solus and it says while idling

MAP (KPA): 98
MAP (Volts): 2.25
BAR (KPA): 98

These stay the same whether I am idling or while lightly moving the throttle.

 

[10sec]

It's bad AFAIK.

 

[Turbocharged400sbc]

pop the line off the map while idling and make sure you hear a sucking sound or fell it suck in your skin if you put your finger over the end.....i have come acrose lines that get pinched/rubber couplers that collapse internally.
if all thats good the map is likely toast....i honestly dont see map sensors fail all that often....

 

[SaturdaysGS]

Will do.. The lines aren't original from the factory as when the dealer did the lim gasket they messed up the tee and taped it which only lasted a week. Figures it's something uncommon. Probably just as uncommon to have both rear door lock actuators go bad (one intermittently works) the sunroof track break (stuck open!)... Etc.

Then again it could just all be bad luck...