1990 Volvo 740 Turbo Gauge Instrument Panel

Tiny
USAHELP
  • MEMBER
  • 1990 VOLVO 740
  • 4 CYL
  • 2WD
  • AUTOMATIC
  • 136,000 MILES
The vacuum line hose from the intake manifold by Throttle body, and goes through the firewall to the the turbo gauge on the instrument panel, Question: I noticed when pulling out the instrument cluster panel, when I attempted to unplug the hose to the gauge, That it would not release, Is this hose that is connected to the "Gauge's Plastic-small L -shape connector(on back of gauge)"Is it electrical wire in the hose or just the plain vacuum air line hose only? The reason I need to know, Is if it is just a plain air line only, I can cut it and reconnect after I remove the cluster to tend to the temperature gauge, this hose is holding me up! Thank you Jerry
Do you
have the same problem?
Yes
No
Sunday, September 5th, 2010 AT 10:23 AM

2 Replies

Tiny
DOCFIXIT
  • EXPERT
Is boost gague part of TACH and VDO brand? have you removed bracket see diagram


http://www.2carpros.com/forum/automotive_pictures/198357_Graphic_599.jpg

Was this
answer
helpful?
Yes
No
Sunday, September 5th, 2010 AT 3:23 PM
Tiny
USAHELP
  • MEMBER
No it is not part of it, The hose connected to the "Turbo Boost Gauge" upper right hand corner of the Instrument panel and right top of "Temperature gauge", I wanted to know if the hose only that is connected to the "Boost Gauge, If it is just a "Vacuum hose" or wire running through it? I have removed the cluster panel out, and is resting on top of steering wheel, The boost gauge's hose is what keeps me from having more freedom of play to take it out! I tried pulling hose from the "L shaped plastic fitting on back of gauge, but will not free up, I was going to cut it, and later, after it was completely out, remove the piece of hose from the Gauge's Plastic "L" shaped fitting, and reattach the main vacuum line, when I service the Temperature Gauge, But I do not want to cut it, if it is not an "AIR" line vacuum hose only! My problem to start with was originally the Thermostat Gauge, It would fluctuate and needle pointer would jump, So I replaced the Temperature Coolant Sensor, A Volvo Mechanic said that the 90 Volvo Turbo Wagon 2.3L 4 cylinder was notorious for the Instrument Panel Temperature Gauge to do this, and for me to remove the Cluster, and add a few drops of a "Jeweler's watch oil on the pointer's bearing! But, as I stated the hose to the Turbo Boost Gauge is keeping me from completely removing the "Cluster Housing" out, I unhooked the Vacuum line hose from the throttle manifold, and push as much free hose in through the firewall, but still is not enough to work on the Temp gauge, I noticed that the hose coming through the firewall does not go all the way to the Boost Gauge connector, instead the vacuum line (Rubber Hose) stops at a point inside the dash and must be connected to something I can not see with a flash light, and I found that there is a "REDUCER HOSE PLASTIC FITTING" From the Gauge's "L" shaped plastic connection to this "Reducer Fitting" mid ways! All I need to know is the Hose that is connected only to the back of the gauge, "Is it Vacuum Air Line Hose Only or Is it an Electrical Wire Hose and the "L" shaped connector to the gauge is not a open air hose plastic fitting to the gauge, Rather this hose from the reducer is a complete "Electrical Connector." PS. In your reply and picture shown an electrical plugin after clip is removed, this is not my problem, and is not part of the boost gauge, the boost gauge only has a rubber hose connected to the gauge, hose is size diameter as a pencil or cigarette. Thank you Jerry
Was this
answer
helpful?
Yes
No
Sunday, September 5th, 2010 AT 6:00 PM

Please login or register to post a reply.

Recommended Guides