:shakehead ok,i have a 95 Blazer, i have a few problems,
- code ph1509
-idle rough when cold, then when gets warms it idles rigt
-what is CPI mean
-my heater/a/c vent is stuck on the defogger, it olny blows out of the defogger, it's does nothing when i switch to vent , heater, etc, i hear a click but idk what it wrong with it

Code 1509 is for the IAC valve.

Remove the Idle Air Control valve, clean it with TB cleaner and scrub it lightly with a toothbrush and then reinstall it.

Have you done a tuneup lately?

-my heater/a/c vent is stuck on the defogger, it olny blows out of the defogger, it's does nothing when i switch to vent , heater, etc, i hear a click but idk what it wrong with it

the controls are ran off vaccum.. i had the same problem and my vaccum hose was disconnected from the vaccum resivour that is mounted to the hood...you have to look for a vaccum leak somewhere...

The vacuum ball on the drivers side portion of the engine bay near the windshiel is where to start.

Ok, no tune up but i just bought the truck, like 3 weeks ago from a bootleg dealer,I also took one spark plug out to see how the engine is runnin and it's runnin clean, the plug was like new, i bought a new IAC and still the same code, it says it has a short in the circuit, where's the cicuit idk, and hmm the vacumm i will check on that tomorrow asap when i get home from work

It could because you have a vacuum leak and the IAC can not compensate for it.

Remove the negative battery cable for ten minutes, start up the vehicle let it warm up and then hold the brake and put it in gear for two minutes and don't let the truck move.

This will force the computer to relearn the idle.

hmmm, wow sounds good i will try that, wow i notice you know alot bought the blazer

alot about* the a Blazer

It sall good, I try to help everyone.

I would seriously consider tuning up the truck.

Consider everything was never touched.

Plugs
Wires (might not have to replace)
Cap & Rotor
Fuel Filter
PCV Valve
Air Filter

What is a TB cleaner? Where is the IAC located?

tb cleaner is THROTTLE BODY CLEANER (SAME AS CARBERATER CLEANER) AND THE ICA IS LOCATED ON THE TOP OF THE ENGINE, TO THE RIGHT OF THE THROTTLE POSITION SENSOR

-what is CPI mean

Central Port Injection

tb cleaner is THROTTLE BODY CLEANER (SAME AS CARBERATER CLEANER) AND THE ICA IS LOCATED ON THE TOP OF THE ENGINE, TO THE RIGHT OF THE THROTTLE POSITION SENSOR


thanks

o hey i meant the left of the throttle position senser