First off, I searched, but couldnt find what Im looking for. I installed my boost gauge this weekend and at first I was having massive difficulty understanding how to set up the gauge itself (the diagram sucked), but I think I finally had it figured out. I used the EGR as a vacuum source and when I first tested it out I was getting about 20 in/hg at start up and it would come down to about 17-18 at idle. Then I connected the power and ground to the cig lighter and now the damn thing is only reading 12in/hg at idle and 14 in/hg when engine braking. I think there has to be a leak somewhere, but I tried listening to find it with no luck. The car isnt really idling high, about 950 rpm. I guess what Im wondering is, is there another way to find a leak other than just listening for one, or do I even have a leak and is this normal?? TIA
Toney '97 RS 5 Speed (totaled) 15.4606@88.42 Mph 96 Toyota Celica GT 88 Toyota Supra NA-T (w/ sports package) Got Boost?? Hell yeah I-6 turbo powah baby!
#57142, "RE: Help with boost gauge." In response to Reply # 0
>First off, I searched, but couldnt find what Im looking for. >I installed my boost gauge this weekend and at first I was >having massive difficulty understanding how to set up the >gauge itself (the diagram sucked), but I think I finally had >it figured out. I used the EGR as a vacuum source and when I >first tested it out I was getting about 20 in/hg at start up >and it would come down to about 17-18 at idle. Then I >connected the power and ground to the cig lighter and now the >damn thing is only reading 12in/hg at idle and 14 in/hg when >engine braking. I think there has to be a leak somewhere, but >I tried listening to find it with no luck. The car isnt really >idling high, about 950 rpm. I guess what Im wondering is, is >there another way to find a leak other than just listening for >one, or do I even have a leak and is this normal?? TIA
I have the innovative turbo system t3/t4 hybrid... there is a spot on the actual turbo to plug the boost guage right in... not sure about yours.
Formally Project Solar Eclipse Now Entering 300ZX Land.
Jim Wolf ECU w/ Boost Jets Jim Wolf Pop Charger Intake Eibach Pro-Kit Lowering Springs w/ Fully Adjustable Gas Shocks B&B Exhaust - 3" w/ Dual 4.5 Oval Tips w/ 3" Test Pipes Konig Five-O 17X8 Rims w/ Polished Lip Blitz Turbo Timer /w Boost Gauge Freshly Painted Calipers Stillen Unorthodox Pulley Stillen Front Nose / Bumper Stillen Short Shifter New RPS Clutch / Pressure Plate / Flywheel - Holds 550 ft lbs of Torque New Fully-Built 5-Speed Transmission New Howe Radiator w/ 18" Electric Fan w/ Auto Thermostat Controller New Yokohama ES100 Tires All Around New Tension Rods New Fuel Injectors New Spark Plugs New Motor Mounts New Vacuum Hoses New Heater Core New Fuel Filter New Ignition Control Module New Hicas (4-Wheel Steering) Lines New Brake Pads / Brake Lines / Master Cylinder
#57145, "RE: Help with boost gauge." In response to Reply # 1
Sounds like you got hold of the brake booster vac source. That's why when you step on the brakes, you lose vacuum. I used a "T" at the intake mani. I've been having a vac loss just as of a few days ago, and just like you said, I have 10 (you had 12) in/hg at idle and the car ran fine. I think you got something leaking, but I'm not an expert apperently, since I can't figure out my own sh*t.
#57147, "RE: Help with boost gauge." In response to Reply # 2
Whats your altitude above sea level? I was reading a couple of weeks ago that for every 1000 feet above sea level above 2000ft. you should expect to get -1 inch vacuum. So, for me being in the mile high city, I am reading about 14-15 inches of vac at idle. Something to consider when doing your readings.
-Chris b.
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