Dekkbrenneren

Hello

I have an blazer 1989 4,3 v6 4wd

Had It in for controll today and the CO was extremely high, so It get way to much. It rattles also on idle, and difficult to drive as it humble and rattles away.

How do I adjust the carburator? Is there any place i can read how to do it and maybe rebuild it? and get the ground settings on it?

Have ordered new o2 sensor

Thank`s

Christoffer

oilcanhenry

Your Blazer should have a TBI unit, not a carburetor. Yes, you can overhaul it. Part Number ACDELCO 19160316 Professional kit

Dekkbrenneren

Thanks, yes okay, is this the 2 "injectors" or nozzels on the top of the "carburator"?

Irish_alley

"throttle body" not carb. you cant tune these as theyre tuned by the ecm. i faulty sensor could/would cause the truck to burn too much fuel or mess up the tune.
Troubleshooting sensors and how to test this would help you test the sensors. but is your check engine light on? does it come on when you first turn the key to "on". when was the last time you ran some sort of injector cleaner in it?

oilcanhenry

Indeed so. Those are indeed the two injectors, held in by torx screws. Its easy to overhaul a TBI unit and like Irish Alley said, you dont tune the Throttle Body Injection units, You can safely soak the injectors in carb cleaner or paint thinner to clean them up, but not the gaskets/o-rings which should come with the kit. If you've been using good quality gasoline, I doubt you'll even need to do that. I'd put a new fuel filter on, unless its not that old as well.

Dekkbrenneren

Thanks for reply, check engine light comes on when i turn the key and go off when I start it.

Probably never ran injector clean, bought the truck for couple months ago so i dont now much about It.