Mini Handheld Vacuum Cleaner can really play the role of air purification?

there is no idle position sensor, there is an iac,idle air control stepper motor that is located on the tbi,throttle body injection unit,there is a tps on the tbi as well,throttle positioning sensor, so if you are looking for an idle adjustment it is not possible to just turn a screw, first you should check for vacuum leaks,a vacuum leak will cause the idle to go up,the block learn will also be up past 128,use a smoke machine and smoke the engine to help detect a vacuum leak first,no leaks found then reset the throttle body set screw to zero,clean the tbi with a good carb cleaner and a little brush,no biding,check tps for correct value, from 0.6 to 0.8 volts at close throttle and up to 4.8 volts at wide open with no voltage drop or glitches,make sure the pcv valve is working properly,if you have idle quality problems make sure all is good,hoses,cap rotor wires plugs,leaking valve seals can contaminate the air intake and play a role in extreme cases. check plugs for a build up of carbon which indicates this. good luck

I guess my first question would be, is the check engine light on ?
If the fuel system is too rich the O2 sensors should be reporting that to the computer. There could be a trouble code that would point you in the direction of the problem.
Otherwise, it could be a weak injector, or a wiring problem that is keeping one or more injectors grounded.
Are all of the spark plugs fuel fouled ?
No problems with the air filter and intake ?

If it is like the older GM Products of the 1960 thru 1980's,
it will be a small vacuum switch inside the air filter housing

When the vehicle is cold a switch in the coolant will
allow vacuum to flow to the air cleaner & the door will
close restricting most air into the motor on start up,so
the air is heated quicker

As the coolant warms up it switches off vacuum & the door
opens.

Easy to check

You use a hand vacuum pump on the air cleaner bottom half
to actuate the door & put a vacuum gauge on the ported
switch when cold & see if you have vacuum & it shuts off
latter when warm

You should have a vacuum diagram on the radiator support
or under the hood on the Federal Emission Label that is on all
vehicles

You should purchase all the factory manuals from Helm.Com
if you intent to work on your own vehicle

Without reference material your done,you don't have any way
to learn the systems your trying to diagnose

You have a check light one,so why have you not worked that issues

You mentioned resolving the PO301 cylinder misfire

I would replace the 3 COP Coils on the firewall side & keep them
to use along with the #4 thru 6 cyl coils if you have more misfire
there.

You really need professional scan tool software for your notebook
& run Mode $06 to check for misfire counts

The front O2 Sensors need to get replaced at 100,000 mile
good or bad.

Check intake & the entire vehicle for vacuum leaks
Need an Evap Smoke Machine for that

Nothing ever gets replaced
You learn the systems & only after testing &
a result that indicates a problem,then you replace
a part.
Have to work the codes down to component testings first
& go thru the entire vehicle & ALL it's systems

I don't look for a problem
I test to see what does work
Then the failed parts find you

Hi, the vacuum line to the air cleaner usually tees into the PCV hose from the valve cover. Black smoke at startup is probably unrelated. That may be caused by leaky injectors or an evap purge valve that is stuck open.

Hello, if your check engine light is not on & the Colorado does not have a P0506 error code....
Check every connection on the air intake between the MAF sensor and the throttle body for vacuum leaks...Remove and clean the IAC (idle air control) & the MAF (mass air flow sensor)
Do not use brake cleaner on the MAF sensor, you can purchase MAF sensor cleaner at your local parts store....I hope this helps.

There are a few things this could be. The MAF (Mass Air Flow) Sensor is dirty or faulty. Note: The use of "oiled" air filters may cause the MAF to become dirty if the filter is over-oiled. There is also an issue with where the MAF sensors leak the silicone potting material used to protect the circuitry.

There could be a vacuum leak downstream of the MAF sensor also.

First simply try cleaning the MAF sensor does the trick. Consult your service manual for it's location if you need help. I find it's best to take it off and spray it with electronics cleaner or brake cleaner. Make sure you are careful not to damage the MAF sensor, and make sure it's dry before reinstalling . Then Inspect all vacuum and PCV hoses, replace if necessary Check for a dirty fuel filter and proper fuel pressure

white vinegar and and windex mix half and half then heavily douse all fabric, take car to carwash and vacuum as much of the vinegar/windex out as possible or if u have a shampooer or steam cleaner.
windex and vinegar is a must tho

professional cleaning sounds like your best deal unfortunatley with what you are describing it will cost @$400 to $500 to clean. If you decided to quit smoking it might take you about month and a half of your cig money to pay for the cleaning