Topic: smog problems about to drive it off a cliff!

[T-YOTER]

i have a 91 toyota 22re all stock
i failed smog twice
i just replaced both o2 sensers
timing chain
oil pump
and had valves adjusted

im failing hc test 120 330 301 idle test
2500 test 180 270 384

its runs good has a lot of power but smokes alittle at 2500 rpm test

whats next that i need to replace?
its under a gross polluter now

[4RunnerChevy]

Timing degree ?  Leak down test on the injector manifold, it should not lose pressure after shutdown or at least not rapidly. 

[T-YOTER [OP]]

every thing passed other then the hc test
timing is perfect
 Leak down test on the injector manifold?

[T-YOTER [OP]]

it starts perfect and it does not idle ruff
once i bring the idle up to around 2500 and let it set for a couple mins thats when u can start to see the smoke its not alot about enough to see and it does not smell like fuel

[kneedownnate]

When was the last time you had the head off and replaced the valve stem seals? 

[emsvitil]

How old is the cat?

[dirtybird]

Is egr valve working? As far as smoke if it's not fuel, you're burning oil sounds like piston rings. Might get away with a fresh oil change try 20-50 oil

[T-YOTER [OP]]

the head is brand new from marlin not even 2 months old thats why im stressing on what it could be, the smoke is white and u can barley see it sometimes its not alot that comes out

[84ToyCrawler]

Are you sure it's not steam?
Does it do it at idle?
or just high rpm's?

[T-YOTER [OP]]

it only does it at high idle
hc 804 rpm idle test max 120 gp 330 meas 301 failed
2500 rpm test at 2630 rpm max 180 gp 270 meas 384 failed

[Tallchevy]

http://www.smogtips.com/failed-high-hydrocarbons-HC.cfm

[T-YOTER [OP]]

so the next thing im gunna try is oil change with some power punch
new spark plugs and gap them right might even swap my cat to i have a high flow cat on it right now not sure how old it is

the truck runs awesome has alot of power and idles great im just stumped on what it could be

[T-YOTER [OP]]

http://www.smogtips.com/failed-high-hydrocarbons-HC.cfm

just lookt at that going to change my oil and filter and run some 20 50 like dirtybird said its worth a shot

[dirtybird]

I hate to say it but if you like the way it runs and only care about passing smog, you can try one of those gauranteed to pass smog or your money back additives that you put in your gas tank. Just another option. Me myself would want to find out what's going on

[Snowtoy]

The numbers don't look like they will drop enough with any of the additives nor the oil change to pass.  Unburnt fuel in the oil shouldn't be causing that high of a reading.  With the timing correct, new head new/valves adjusted correctly, and new O2 sensors, it looks a rich air/fuel mixture, bad cat, or leaking injectors. 

I would start with an inspection of the intake and exhaust system(ahead of the O2 sensor), unmetered air will cause the ecu to richen the air/fuel ratio to try and correct for the lean condition the O2 sensors are measuring.

What is the CO2 readings?  According to my smog tech, readings under 13 is often an indication that the cat isn't working properly.

[Toymin8r]

You don't have to drive over a cliff, just out of California.

[Rocksurfer]

You don't have to drive over a cliff, just out of California.

Funny, that's what I was thinking too. If my 4Runner had any issues I plan on getting it done in AZ.