1992 camry 3000 v6 gas rich exhaust smoke

I assume your car has fuel injection -- if so, the computer adjusts the amount of fuel delivered to the cylinders, and you can't change it.
Why do you think the engine is running rich? If there's smoke coming out the exhaust, it could be a leaky fuel injector, a blown head gasket or a failed piston ring that's allowing engine oil into the combustion chamber.
If there's no smoke, but the engine isn't running well, consider all the usual suspects: dirty air filter, worn-out spark plugs/wires, partially clogged fuel filter, dirty fuel injectors, wrong ignition timing, corroded connectors in ignition circuit, failing fuel pump, etc. Also, figure out the location of the intake air flow sensor (usually between the air filter and the engine) and clean it (using a spray specifically made for that purpose, NOT carb or brake cleaner).
You also could consider a SeaFoam treatment for the engine, but it needs to be done carefully -- check an online forum for the right way to do it for your vehicle.

92 camry failed smog because running rich. Why? - Toyota Nation ...

www.toyotanation.com/.../411132-92-camry-failed-smog-because-runni...

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Toyota Camry running rich Questions & Answers - Fixya

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... running rich I have a 1991 Camry that is running rich. I just replaced the O2 sensor and a new cat, oil change, new spark plugs. The car wont pass smog. it is ...

1992 Toyota Camry XLE V6 Excessive Running Rich ...

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1992 Toyota Camry XLE V6 Excessive Running Rich ... 1997Toyota Camry V6 forward Oxygen (O2) Sensors .

1st make-sure battery end are clean ck all fuses look and see
if headlight are bright then cke charging sustem 12.5 idle
13.5 1000 rpm. Then take to auto zone and use obd2 and find
a code what color is the smoke if it white blown head gskt
burning antifreeze of blue smoke valve seals stuck rings
how often do you change oil every 3000 miles I hope this will get
you started please rly when you have more informationinformation

White smoke coming from the exhaust upon startup is merely water vapor, which is a normal by product of combustion. I do not believe you have anything to worry about. It disappears after the engine warms up a bit.

It seems you may have a head gasket leak from the coolant jacket to one cylinder or more.
To confirm this you should get a radiator leak-down test, to see if the coolant jacket does have a leak, and a compression test to see if one or more cylinders have a leak.
The white smoke is coolant vapour, and the backfiring, fuel igniting only once it gets to the hot exhaust from other cylinders.

Actually is sounds more like a blown head gasket or intake gasket. The white smoke is probably water.. and my guess is your coolant reservoir tank is dry or soon will be.. and the next thing will be overheating. The water is getting into the combustion cycle and turning to steam as it blows out the exhaust. Hence white "smoke"..

The loss of compression due to the gasket leak on one or more cylinders would account for the loss of power as well.

I was not aware this model came with turbocharger.. unless an aftermarket one was added.

A good shop will do a compression check and identify if it's the head or intake gasket.

Best of luck!

yes basically there usually held on with a couple of bolts

It sounds like you have a blown head gasket, or maybe both head gaskets....it has all the symptoms of such.....

its the ecu ,my camry had the same problem. one of the injectors is staying open and flooding the cylinder.changerd the injectors same problem,changed the ecu problem solved.

yea i had the same problem, my last mechanic didnt tighten the top where d sprak plugs go in so it was leakin oil all they way down to the bottom where the exhaust runs and was smokin because of that... had it tightned and no longer ne smoke