Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Forums > Porsche Forums > 911 / 930 Turbo & Super Charging Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Registered User
 
j930's Avatar
 
Join Date: Aug 2010
Location: Anthem, AZ
Posts: 875
Garage
Turbo gauge inop

just bought my first porsche. the turbo gauge does not move? how do I know if its the gauge or the turbo? What should I be looking for?

Old 09-10-2010, 10:00 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Registered
 
Join Date: Jul 2003
Location: Glorious Pac NW
Posts: 3,527
Quote:
Originally Posted by j930 View Post
just bought my first porsche. the turbo gauge does not move? how do I know if its the gauge or the turbo? What should I be looking for?
The stock gauge reads relative boost. It does nothing until the turbo builds boost over atmospheric pressure. Have you had the car in boost?

If yes and the gauge still does nothing, take the spade off the boost terminal at the back of the instrument, boost gauge should peg with power applied. Connect to ground the boost sensor terminal to ground, it should read nothing. If not, it's the instrument.

Now you get to check the boost sensor - which the resistance of which should vary according to pressure.

If that all checks out, look for the sensor wire to be shorted out to ground somewhere/somehow.
__________________
'77 S with '78 930 power and a few other things.
Old 09-11-2010, 12:13 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
beancounter
 
jwasbury's Avatar
 
Join Date: Jan 2008
Location: Weehawken, NJ
Posts: 3,627
First of all, welcome to the forum...and congrats on your new car.

Quote:
Originally Posted by j930 View Post
how do I know if its the gauge or the turbo? What should I be looking for?
Let's start with the assumption that its the gauge because if your turbo wasn't making boost you'd know it. If your car can't out-accelerate a late model Toyota Corolla, then I'd be suspicious of the turbo itself. Boost is like porn...you know it when you see it. If it feels like warp-drive kicked in at 3k RPM when your foot is heavy on the go-pedal, you've got boost...and you're probably giggling like a school girl.

This is why you were asked:
Quote:
Originally Posted by spuggy View Post
Have you had the car in boost?
Spuggy has given you great info about troubleshooting your gauge. Assuming your engine is in stock configuration, the sending unit for the gauge can be found under the intercooler and is item#14 in this diagram:


Enjoy the ride sir.
__________________
Jacob
Current: 1983 911 GT4 Race Car / 1999 Spec Miata / 2000 MB SL500 / 1998 MB E300TD / 1998 BMW R1100RT / 2016 KTM Duke 690
Past: 2009 997 Turbo Cab / 1979 930
Old 09-11-2010, 05:41 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Registered User
 
j930's Avatar
 
Join Date: Aug 2010
Location: Anthem, AZ
Posts: 875
Garage
we checked the sending unit and there are two posts, one upper and one lower there is nothing attached to the upper post and I made sure the lower was tight. When the key is off the gauge is below 0, when I start it up it rises to 0? I believe the turbo is working because its the fastest car I have ever driven but I dont like seeing the gauge at 0.

Old 09-12-2010, 08:43 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 06:56 AM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2020 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.