Boost gauge not reading boost

Dante2009 · 02-25-2017, 07:47 PM

So I have a gtm stage 1 sc and I recently installed a prosport boost gauge everything seems to work fine but I'm not seeing any boost readings, I tapped into the bov line on the passenger side. I don't wanna tap into the map sensor line on the driver side since it would be the same thing. Anybody got any suggestions if this will work or other?

ChaseZ · 02-25-2017, 08:40 PM

You aren't seeing any readings at all on it? As in nothing registering, or only vacuum.

Dante2009 · 02-25-2017, 10:13 PM

Yea I'm only seeing vacuum it goes up to -2 on vacuum but no boost vacuum reads fine

ChaseZ · 02-25-2017, 10:18 PM

Any vacuum leaks..

Have you driven it and had it under load or are you just going by idle and some revs?

SouthArk370Z · 02-25-2017, 10:22 PM

My two guesses:

Since you are never seeing positive pressure, it sounds like your sensing port is reading pressure before the pump. I'd use the MAP port.

Or you have a wiring/config problem. Not uncommon on new installs.

Dante2009 · 02-25-2017, 10:47 PM

Chase z, yes I drove it around the block got on the highway and like I said sit at around -20 at idle then when I step on and my bov goes off goes up to -2 but no boost.

South ark but my bov line is going to the map port on the left side so moving it to the right side would it make a difference?

SouthArk370Z · 02-25-2017, 11:28 PM

Quote:

Originally Posted by Dante2009

... South ark but my bov line is going to the map port on the left side so moving it to the right side would it make a difference?

Without laying eyes on your setup, I'm just guessing. As a rule-of-thumb, it is best to have sensors as close to what they are measuring as possible. You're wanting to measure manifold pressure, so the manifold itself is probably the best point to measure.

solidus · 02-27-2017, 06:33 AM

I tapped the manifold to read boost and that line is dedicated to my Greddy Profec which serves as my gauge.

Sent from my SAMSUNG-SM-G890A using Tapatalk

Dante2009 · 02-27-2017, 07:05 AM

Solidus you tapped to the map sensor on the manifold or straight into the manifold?

solidus · 02-27-2017, 08:46 AM

Straight into the manifold.

Dante2009 · 02-27-2017, 12:58 PM

Can you send me a pic on where you tapped?

solidus · 02-27-2017, 01:33 PM

It would be later this evening but it's tapped twice in the front of the manifold. I did two 1/8 npt taps and inserted barbed brass 1/8 npt fittings. One for the boost controller and the other for the BOV. There may be pics on here already from BP kit builds. The kit instructions called for one tap but it's recommended not to use a tee so I did two separate taps.

Sent from my SAMSUNG-SM-G890A using Tapatalk

Dante2009 · 02-27-2017, 02:49 PM

Ah I know where you tapped in now, I removed those hoses and just blocked them off with rubber caps and hose clamps

solidus · 02-27-2017, 06:07 PM

No I literally drilled and tapped the manifold. Those hoses are still intact on my setup. I have a BP kit.

Sent from my SAMSUNG-SM-G890A using Tapatalk

ChaseZ · 03-15-2017, 01:22 PM

Did you end up resolving this? How?

02-25-2017, 07:47 PM	#1 (permalink)
Dante2009 Base Member Join Date: Jan 2016 Location: Georgia Posts: 36 Drives: 09 Nissan 370Z Rep Power: 9	Boost gauge not reading boost So I have a gtm stage 1 sc and I recently installed a prosport boost gauge everything seems to work fine but I'm not seeing any boost readings, I tapped into the bov line on the passenger side. I don't wanna tap into the map sensor line on the driver side since it would be the same thing. Anybody got any suggestions if this will work or other?

02-25-2017, 10:22 PM	#5 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324197	My two guesses: Since you are never seeing positive pressure, it sounds like your sensing port is reading pressure before the pump. I'd use the MAP port. Or you have a wiring/config problem. Not uncommon on new installs. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

02-27-2017, 06:07 PM	#14 (permalink)
solidus Track Member Join Date: Oct 2014 Location: Orlando, Florida Posts: 694 Drives: 15' Nismo Black 6MT Rep Power: 10080	No I literally drilled and tapped the manifold. Those hoses are still intact on my setup. I have a BP kit. Sent from my SAMSUNG-SM-G890A using Tapatalk jwick likes this.

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02-25-2017, 08:40 PM	#2 (permalink)
ChaseZ A True Z Fanatic Join Date: May 2016 Location: Calgary Posts: 3,799 Drives: 16 370z Rep Power: 94682	You aren't seeing any readings at all on it? As in nothing registering, or only vacuum.

02-25-2017, 10:13 PM	#3 (permalink)
Dante2009 Base Member Join Date: Jan 2016 Location: Georgia Posts: 36 Drives: 09 Nissan 370Z Rep Power: 9	Yea I'm only seeing vacuum it goes up to -2 on vacuum but no boost vacuum reads fine

02-25-2017, 10:18 PM	#4 (permalink)
ChaseZ A True Z Fanatic Join Date: May 2016 Location: Calgary Posts: 3,799 Drives: 16 370z Rep Power: 94682	Any vacuum leaks.. Have you driven it and had it under load or are you just going by idle and some revs?

02-25-2017, 10:47 PM	#6 (permalink)
Dante2009 Base Member Join Date: Jan 2016 Location: Georgia Posts: 36 Drives: 09 Nissan 370Z Rep Power: 9	Chase z, yes I drove it around the block got on the highway and like I said sit at around -20 at idle then when I step on and my bov goes off goes up to -2 but no boost. South ark but my bov line is going to the map port on the left side so moving it to the right side would it make a difference?

02-27-2017, 06:33 AM	#8 (permalink)
solidus Track Member Join Date: Oct 2014 Location: Orlando, Florida Posts: 694 Drives: 15' Nismo Black 6MT Rep Power: 10080	I tapped the manifold to read boost and that line is dedicated to my Greddy Profec which serves as my gauge. Sent from my SAMSUNG-SM-G890A using Tapatalk

02-27-2017, 07:05 AM	#9 (permalink)
Dante2009 Base Member Join Date: Jan 2016 Location: Georgia Posts: 36 Drives: 09 Nissan 370Z Rep Power: 9	Solidus you tapped to the map sensor on the manifold or straight into the manifold?

02-27-2017, 08:46 AM	#10 (permalink)
solidus Track Member Join Date: Oct 2014 Location: Orlando, Florida Posts: 694 Drives: 15' Nismo Black 6MT Rep Power: 10080	Straight into the manifold.

02-27-2017, 12:58 PM	#11 (permalink)
Dante2009 Base Member Join Date: Jan 2016 Location: Georgia Posts: 36 Drives: 09 Nissan 370Z Rep Power: 9	Can you send me a pic on where you tapped?

02-27-2017, 01:33 PM	#12 (permalink)
solidus Track Member Join Date: Oct 2014 Location: Orlando, Florida Posts: 694 Drives: 15' Nismo Black 6MT Rep Power: 10080	It would be later this evening but it's tapped twice in the front of the manifold. I did two 1/8 npt taps and inserted barbed brass 1/8 npt fittings. One for the boost controller and the other for the BOV. There may be pics on here already from BP kit builds. The kit instructions called for one tap but it's recommended not to use a tee so I did two separate taps. Sent from my SAMSUNG-SM-G890A using Tapatalk

02-27-2017, 02:49 PM	#13 (permalink)
Dante2009 Base Member Join Date: Jan 2016 Location: Georgia Posts: 36 Drives: 09 Nissan 370Z Rep Power: 9	Ah I know where you tapped in now, I removed those hoses and just blocked them off with rubber caps and hose clamps

03-15-2017, 01:22 PM	#15 (permalink)
ChaseZ A True Z Fanatic Join Date: May 2016 Location: Calgary Posts: 3,799 Drives: 16 370z Rep Power: 94682	Did you end up resolving this? How?