Depo gauge off calibration?

[mike164s]

ATM- I have your boost gauge kit and the depo gauge reads -2mmHG when the engine is turned off. It should be 0 and the gauge is possibly out of calibration. Is there anything that can be done to fix this? Thanks!

[Tweak]

I may be wrong but I thought the Depo gauge does auto calibration.

[TurboBullett@Ambient Thermal Management]

I may be wrong but I thought the Depo gauge does auto calibration.

Thanks Tweak that's correct the gauge auto calibrates to 0 when the vehicle is turned on!

[BigT]

I haven't paid close attention to the gauge itself but I thought when the car is idling it should be pulling vac right? So if it's reading 0 at idle there is something wrong. But yes full sweep style gauges should auto calibrate once power is applied to them.

[mudking]

I'm no car expert , but do have the same depo gauge and have never seen it at 0 when idle, always down around -24 for me without the AC on..

[mike164s]

Hey guys the issue is when the engine is not running but there is still power going to the gauge. In accessory mode and after the engine is turned off

[mike164s]

Thanks Tweak that's correct the gauge auto calibrates to 0 when the vehicle is turned on!

Yes and it does not do this!

[mike164s]

ATM- any input on fixing the issue? I can take a video if need be. Thanks

[TurboBullett@Ambient Thermal Management]

Mike,
When the car starts the gauge auto calibrates. It showing -2hg is such a small difference and won't affect ultimate boost level calibration. Certain barometric conditions can show as -2hg which is not equivalent to +2psi. Please take a video and I will forward it to depo USA as they ultimately warranty their gauges, we don't as we are not the manufacturer of the gauge.
-what does the gauge read at vacuum car started?
-what boost level does it peak at?
-Does this correspond to the tune you run?

[mike164s]

Mike,
When the car starts the gauge auto calibrates. It showing -2hg is such a small difference and won't affect ultimate boost level calibration. Certain barometric conditions can show as -2hg which is not equivalent to +2psi. Please take a video and I will forward it to depo USA as they ultimately warranty their gauges, we don't as we are not the manufacturer of the gauge.
-what does the gauge read at vacuum car started?
-what boost level does it peak at?
-Does this correspond to the tune you run?

Thanks for the quick response. Sorry, not sure why I kept saying the units in mmHG and not PSI. Vacuum is at -24 and peak boost is 23psi. I run the RRM V2 piggyback.

Here's the video:

https://www.youtube.com/watch?v=t3hFIcNUDFQ&feature=youtu.be

[TurboBullett@Ambient Thermal Management]

-24 and +23 on that tune sounds like the gauge is calibrating correctly. However ill talk w depo and get their take on it, the gauge assembly is very simple just a sender and reciever so it's easy to diagnose!

Thanks for the quick response. Sorry, not sure why I kept saying the units in mmHG and not PSI. Vacuum is at -24 and peak boost is 23psi. I run the RRM V2 piggyback.

Here's the video:

https://www.youtube.com/watch?v=t3hF...ature=youtu.be

[mike164s]

-24 and +23 on that tune sounds like the gauge is calibrating correctly. However ill talk w depo and get their take on it, the gauge assembly is very simple just a sender and reciever so it's easy to diagnose!

Ok sounds good. Thanks for the help!

[mike164s]

Any news back from depo?

[nilfinite]

My Depo Gauge has been going haywire the past couple of days. It looks like either the sender unit is off or the air filter could also be clogged.

[scrumby14]

I have the same issue, Depo gauge not reading zero when engine is off. (it worked fine for the first 3 months).... then it start getting to -1, -2, then -3.
Worst one is when I was up at Lake Tahoe (+6500ft elevation) i was getting -6. Now I'm back to -2 in the San Francisco Area (+100ft elevation)

My positive boost pressure seems to be reading correctly. +25psi peak, +21-22psi sustain. (w/ RRM U3 ECM) Even when I was up in Tahoe, i was getting about the same reading 25/22.