TwinTurbo.NET: Nissan 300ZX forum - Stock boost gauge inaccurate
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Subject Stock boost gauge inaccurate
     
Posted by Drk93TT on February 27, 2021 at 5:39 PM
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Message So my stock boost gauge looks like this with Key On Engine Off:

Screen-Shot-2021-02-27-at-6-38-40-PM


Things I have already done with no change:

1 Used an aftermarket boost gauge/vacuum gauge.
Cluster shows about 7psi on full boost. The aftermarket gauge was near 10psi. (normal w stock boost solenoid) Vacuum was where it should be.

2 Swapped a good known under hood boost solenoid / box
Took the solenoid that was on a car working (showing proper boost AND when key on engine off on the other Z showed 0 too) Also connection was good.

3 Replaced the ENTIRE vacuum line to the plenum and boost gauge solenoid/box


I am thinking the issue is the gauge itself in the cluster, and its really not worth pursuing to remove the entire cluster , but could If I had to .. anyone else familiar with this?

     
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