A few questions.

[RiZLA]

i have a 90 turbo.

my boost gauge isnt working. its constantly on 0 mmHg.

my speedo is off by at least 20-30 km/h. im using 225/50/r16 wheels so i dont know why it would be off unless it just needs a cable.

my brake lights dont work, just the auto lights are on . is this a common issue?

my drivelne is making knocking noises, is this just a u-joint/yoke problem or is cracking a common issue?

i have trouble starting sometimes and ive had to push start it a few times. at random times when i attempt to start it, it wont crank. all the electronic accesories work and ive already ruled out the battery. sometimes if a wait a few minutes it starts right up and it cranks fine. any ideas?

and one more thing.... where can i find a cai in the toronto/mississauga area that would be in stock?

[Jeeves]

You have a suite of issues.

I assume you mean the stock boost gauge isn't working. Forget about it, it's worthless anyway, save yourself some headaches and buy an aftermarket one.

Speedo being off, could be the speedo cable, could be the adjustment setting behind the gauge. Replace the cable first, if it persists, look at adjusting the speedo.

Brake lights aren't a common issue. I'd check to make sure the brake switch is functioning (it's attached to a metal bar above the brake pedal, look under the dash area there for it).

Driveline, it could be the U Joint, could be several other things, can you isolate what part is making the noise?

That sounds like a Cam Position Sensor problem, search for "CPS" or Cam position sensor here, I've talked about it a lot.

CAI's, just use eBay, or make your own.