Kawshus

Hey guys,

New to the rotary scene and just picked up a 87 TII yesterday. I noticed that the boost gauge is not working when I start the car or when i'm driving. The gauge stays still as if its not connected. I looked around for disconnected wires but didnt see anything out of place.

Can someone help guide me to get the boost gauge working?

87 Turbo II 13B Stock, no mods.

Aaron Cake

iTrader: (1)

On the passenger side shock tower, make sure that the pressure sensor (there is a vacuum line running from it to the intake manifold) is plugged in.

dwb87

iTrader: (22)

It wouldn't be such a bad idea to invest in an aftermarket boost gauge. (Just an option.) - If what Aaron Cake is saying may be the problem... A new gauge won't 'fix' that. That vacuum line MUST be attached.

satch

iTrader: (1)

Brown/Red wire at the sensor (plugged in) should read 2.3 to 2.7 volts w/key to on and vacuum hose to sensor disconnected.

street_ruler

thread revival...

whats the little "dial switch" just next to the pressure sensor? it has a little "R" and "L" on it?

satch

iTrader: (1)

That's the Variable Resistor, used for setting the idle. L is for lean and R is for rich. It's set at the factory and not really supposed to be fiddled with unless the component is being replaced or someone else fiddled with it.

street_ruler

it has a blob of what looks to be RTV or JB weld or something of that nature in there. is that how the factory locked it or is that a sign that someone has been in there putzing with it?

satch

iTrader: (1)

Factory done.

street_ruler

awesome. thats what i wanted to hear. doesnt seem like anyone's screwed with it.

ASTRX7FD

here this has some wiring guides on it hope this helps Foxed.ca - Mazda RX-7 Manuals