i just got my cobalt ss/sc. I noticed that the boost guage is stuck on 8 psi. even with the car off. You guys got any suggestions?

 

it's broken thats why.

 

do yourself a favor and buy a new mechanical boost gauge, stock ones are useless.

ps, if you want a stock one, you can buy mine.

 

well i figured it was broken, but i didnt know if this was something simple like a loose cinnection, but i will look into a mechanical one, thanks guys

 

mine still sort of works but i think i have a leak any suggestions on how to check it

 

Is there a brand of guage you guys would recomend for best fit?

 

Best fit?
Whatever size your stock one is there are plenty of options. Auto Meter is always safe but really anything works. Just make sure it's in psi and not bars because the bar meters are harder to read (in my opinion). I have a prosport one that's not too bad but it's got automatic stepping which sucks and makes it somewhat inaccurate at least for momentary boost readings.

Actually a good cheap boost gauge you can get one from a company called vdo they are no frills but supposed to be accurate, I think they used them in old porsches. Usually the japanese stuff is in bars but I think hks and greddy make psi gauges; just...pricey. I don't suggest an electrical gauge, as the mechanical ones should be more accurate.

 

thanks guys, i was looking at some autometer mech guages. i know its not a super big thing for a stock car, but if its there i like it to work

 

leak on an electric gauge? lolz

 

lol well the hose that comes from the supercharger that leads up to were the gauge is at to mesure how much boost its getting i think that has a hole or something cause it moves when im speeding but it doesnt go above zero and when im driving slow it hardly moves

 

that stock gauge gets the signal from the ecu

 

it does wow i didnt know so were does that hose lead up to then i goes right thru the fire wall

 

your ecu is under the hood. it sends a wire with the signal to the gauge.

 

alright thax for clearing that up lol i gonna have to check it

 

thats normal, your car doesnt always go into boost

 

yea i know its just when im speeding wot it wont go above 0 like it use too lol

 

Nah...he has to have a mechanical gauge if it's got a "hose". Check the hose clamps that should be on there but I'm guessing aren't and if necessary replace the hose with aquarium tubing from walmart or home depot it's all the same ****.

 

any one got a pik of the engine to see if i see the same hose lol

 

On the back of the gauge is there just wires...well...a harness plug (like an interceptor...if you have one) or are there wires and a hose. Mechanical gauges have wires for lighting (usually a power and a ground but could be other wires such as a headlight/dimmer wire) and one hose "barb" for a small diameter tube that goes to a vacuum T from a hose near the intake manifold.

 

i havent taken apart the gauge yet lol dont want the airbag knocking me out but when i was on the engine bay i follow the tube that goes from the supercharger to the firewall

 

There's no airbag there. lol Just loosen the screw and pull the a-pillar off.

 

were do i loosen it up from

 

anyone know how to check and see if the sending unit for the stock boost guage is bad?