My 1st gen failed emissions today. I need to get it plated, and was hoping someone would have better insight to my problem than the people i already asked. Here it is:

My 87 22RE 4runner failed emissions on hydrocarbons. However it ONLY failed on the idle test - 2500rpm test passed comfortably. Here are the numbers off the top of my head.

max ppm for both tests: 220. What i got: 340 @ idle, 180 @ 2500rpm.

I got varied and inconclusive information from those i asked. I have new spark plugs, and the current wires appear in good condition. Fresh oil about 1000 miles ago. I usually put 87 octane in.

Can anyone give me insight into what they believe would help me pass, or what my problem is? One person told me its prob the cat. Before i go shell out for a cat, i'd like to see if that's not the true problem.

I can't really tell you what's going on with your ride, but a well placed $50 always helped me get a beater to pass. "Wink Wink"

Improve metering and detonation quality:
-fuel filter, injector seals
-cap, rotor, wires
-clean throttle body
-chevron techron concentrate
-replace pcv, check for vacuum leaks
1k miles is not "fresh oil", that is used. It's best to change it just before the inspection. This way you get a very minimal amount or zero fuel fouling. You might consider check running and rest, fuel pressures. If you have a failing pump or regulator, you'll get too much fuel into the chamber(not atomized properly due to low pressure) and the burn result will be a rich exhaust mix. It is also worth checking the timing.
regards

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Vote to repeal emissions testing

So it's a tie, 2 useful responses and 2 useless responses. ^^

could always try seafoam... though there are many varied opinions on its effectiveness.

Oh yeah, and you tipped the scale to 3 to 2

The internet, among many things, said i should try cleaning the "throttle plate", as that should make a big difference. Im trying to edge out other things before i go blow $$ on a new cat

bump

What is your engine temp at idle? Make sure you're running as hot as practical. Maybe switch to a hotter thermostat just for the test.

Also. Do you have an old or aftermarket cat? The general rule is the cat needs 10-15 minutes of driving to really get hot, when it operates best.


It could help. Really get the cat hot.

I believe i have the factory cat. I've been hearing that i can scrap this cat for ~$80 and buy a new aftermarket cat for $70.

My temperature gauge in my gauge cluster does not seem to be functioning properly. When i start it on a cold day, it will typically bounce from cold to normal temp after about a minute or two of idling.

Biiiiitches. Figured out the problem. Yeaaaaa. It turned out to be my timing. It was like 15 degrees advanced or some ****. So we turned it down. And now it puts out >100hc. Yayyyyy.

nice! congrats...happy it was a cheap fix...ill keep this in mind if i fail this year haha

However I am absolutely not keeping the timing at 5 degrees advanced. There's noooo power at the stock interval. It literally can't get out of its own way now. So its back to polluting after i pass.