My 80 Failed emissions this week

[Stuckinthe80s]

While that’s sage advice, it doesn’t find root cause. A good function/running 1fz should be around half of those limits. The above was not adequate to get me to pass.

After properly diagnosing my erg valve, glitchy tps, and weak cats, I fast passed at 485k miles.

Oh and putting some 265 highway tires on at 50psi.

I’m convinced that last part is a key contributor to passing. It makes perfect sense as the less load on the system, the less compensation the ECU is going to trigger, the better exhaust numbers you’re going to have.

 

[Inukshuk]

WHoo hoo - new gas cap, tires at 35psi, clean air filter and two cans of HEET (red) in Decono - and I passed. THx all. 'till next time...

Well done. I am vindicated!

For anyone asking, "Why Dacono?" it is because you have 25 minutes at highway speed to get there, its just off the exit, and usually short lines, so the cats stay hot. Plus you can oogle Earthromers.

 

[60wag]

I'm shocked the CO dropped that much and the CO2 is unchanged. Strange stuff this emissions testing.

 

[jps8460]

I'm shocked the CO dropped that much and the CO2 is unchanged. Strange stuff this emissions testing.

Plugged up air filter causing a rich condition would definitely be a contributor.

 

[LARGEONE]

Drive it like you stole it and pull in on a non-busy day....that is KEY!!!

Glad you got a two year extension! Now, go fix it right

 

[Inukshuk]

Passed Emissions, again! 388,000. Original CATs.
Standard proven procedure: Oil change. 1/2 tank gas. 2x red heet, 45 PSI. Dacono. Emissions gas cap.
I also learned today. It was a slow day. No line and Steve was my tester. He has nearly 20 years at Dacono. He thought he remembered my truck.
My 1993 FZJ80 fast-passed. "fast-pass" means the results are so good the test is shorter. Steve shared that in these older lower power to weight ration rigs the tester should start the "hill" portion in 2nd, OD off, and part way through shift to D. He said a lot of newer techs do not know to do that. Same as driving a real hill in an 80. He said its fine to ask your tester, "do you know the procedure for these older underpowered AWD Toyotas where you start the hill in 2 before shifting to D?" IF you go to Dacono, look for Steve. Hes a fan!

 

[Johnny Utah]

I also passed emissions again! I’m kinda surprised because the last time I tested, the kid couldn’t find my OBDII port so he just put it on the rollers. I passed last time, even though it stated that the Diagnostic Port was damaged and/or missing. Not sure how that works.

Anyhow, went in this morning for another test. I added a half bottle of Stabil and had a full tank of gas. Tire pressure is about 34 all around. I drove the long way to the Golden station via the highway to warm it up.

I was worried because the guy this time knew exactly where my OBDII port is. Put it on the rollers and was on there quite a long time. I was surprised to see that not only did I pass, but I passed with pretty low numbers.
97, stock 1FZ, original cats, 224,600 miles.