Emissions test procedure

[ElliottB]

This is somewhat unrelated to the OP's issue, but....

Is there anyway to get a desmogged rig to pass emissions? I don't need to, just curious if there is a way to lean the carb out to pass.

 

[jacdaw]

This is somewhat unrelated to the OP's issue, but....

Is there anyway to get a desmogged rig to pass emissions? I don't need to, just curious if there is a way to lean the carb out to pass.

I think you'd have to get an ignorant technician who would not notice the visual failure. If they are following a check list of smog components for your year, you'd fail with a de-smog vehicle.

My truck has a decal under the hood that reads: no catalyst. I had to point it out to the technician last year when he tried to fail me on the visual.

 

[Rzeppa]

This just in:

Hot Tuna
Rhythm & Roots Festival
Ninigret Park
Charlestown, R.I.
September 5, 2009

No idea on air pump output.

Take the hose off the front of the intake of the ABV and see if anything's coming out while the engine is running.

I have desmogged 3 cruisers (never smogged one) and made the JimC approved emissions de-smog schematic that has been floating around the web for some time now.

I thought that was you. URL?

Don't forget to notify TLCA of your change of address so you keep getting your Toyota Trails. And, you might try asking our own Robbie Antonsen at techeditor@tlca.org - he will give you a quick reply via email so you don't have to wait to see the answer in Toyota Trails. Once again, welcome to Colorado and Rising Sun!

 

[ElliottB]

My smog pump is still there but it's gutted. Acting basically as a pulley. I think it would pass visual inspection.

 

[rover67]

Hey Rich... Do you have and VSV's Lying around? I need one

if not did that 60 at the yard have the vacuum stuff (switches, contril valves, ect.) still attached?

Just figured I'd ask!

 

[PabloCruise]

Here are the details from my '78 Toyota Emissions Manual:

They go for timing first, then vacuum, then mix, then things like air filter and PCV...

 

[thugmusk]

Initial diagnosis. The Cat is toast and the carb is "not metered correctly for this altitude and that engine". I was told it is very possible this carb cooked the cat by it dumping so rich of mixture.

Air injection system fine as is all the emissions doo dads. I'm told.

 

[wesintl]

scott at AA performance muffler and brake can hook you up on getting a new cat in.

Good luck

 

[60wag]

If the carb has stock jets, a functional high altitude compensator, and came on an FJ60, then it it is properly "metered" for the altitude. Maybe a carb rebuild and a new cat will get you fixed up. After a "Jim C" carb rebuild and the Manafre replacement cat, I was able to get my CO down to 22 gpm.

 

[thugmusk]

Passed!

If the carb has stock jets, a functional high altitude compensator, and came on an FJ60, then it it is properly "metered" for the altitude.

I had thought that as well.

This Cruiser came from an emission testing free area of CO and I believe was previously de-smogged (by close examination of all emissions components/pump/rail etc). When the PO got another, nicer 60, I'm thinking it too was de-smogged and all it's emissions stuff, including the carb (that much I was told) ended up on my cruiser. You would think it all should work just fine but apparently that wasn't the case or something was overlooked in the swap. The cat was totally shot and the shops assumption is the raw fuel did it. After their carb adjustments and then a new cat, my numbers for HC went from 4.11 to .78 GPM, and to 12.3 from 88.4 GPM for CO. Those seem low numbers for just a cat replacement so I'm thinking something was not right with the carbs prior set points.

So, no "gross polluter tags" for me, although tallied up, I now qualify for a waivor.

 

[60wag]

I'm glad you got it straightened out. Getting the CO down to 12 is impressive.

 

[thugmusk]

VSVs

Hey Rich... Do you have and VSV's Lying around? I need one

if not did that 60 at the yard have the vacuum stuff (switches, contril valves, ect.) still attached?

Just figured I'd ask!

I got two sets of emissions stuff but only one of those metal control valve sets. Feel free to ping me.

 

[RicardoJM]

Rich, glad to hear you've got it all fixed and ready to pass emissions.

 

[thugmusk]

Rich, glad to hear you've got it all fixed and ready to pass emissions.

It already passed, part of their service was to take it to emissions for me. Those numbers I reported are directly off the test form.

 

[RicardoJM]

It already passed

Even better.

 

[jacdaw]

Okay now it's my turn to struggle with high CO% again. At least the standard is the same this year as last year for my truck: 1.5% at idle.

Last year the first result was 4.8% (the p.o. lived in the mountains and refused to pay to fix it). I discovered a torn diaphragm that was spilling raw gasoline into the vacuum lines. Not sure how that gets into the exhaust, but the test results do not lie. $25 part at the dealer and 2 minutes to r&r and the next test was .14%

Nothing has changed since then except new air filter and cleaned plugs (new last year) and a mere 4k miles on the clock. Today's result was 2.68%. I pulled the vacuum hose off the diaphragm and it is not wet with gas, but I ordered another one today just in case. Should be here Monday. I'm afraid pulling the little housing will tear the diaphragm if it's not already compromised.

Looking in my Haynes, the only fuel/air mix adjustment I can find is for the idle circuit. I think they disregard the 2500rpm result, so I'm gonna adjust that too. I just don't understand how/why it could be running rich. Would certainly explain why I'm only getting 11MPG at the moment tho.


Left a VM for Robbie in case he's got a FSM that describes carb adjustments better than what I have. Does anyone recall how many days I have to get it back to ACC for the free retest?

 

[Uncle Ben]

okay Now It's My Turn To Struggle With High Co% Again. At Least The Standard Is The Same This Year As Last Year For My Truck: 1.5% At Idle.

Last Year The First Result Was 4.8% (the P.o. Lived In The Mountains And Refused To Pay To Fix It). I Discovered A Torn Diaphragm That Was Spilling Raw Gasoline Into The Vacuum Lines. Not Sure How That Gets Into The Exhaust, But The Test Results Do Not Lie. $25 Part At The Dealer And 2 Minutes To R&r And The Next Test Was .14%

Nothing Has Changed Since Then Except New Air Filter And Cleaned Plugs (new Last Year) And A Mere 4k Miles On The Clock. Today's Result Was 2.68%. I Pulled The Vacuum Hose Off The Diaphragm And It Is Not Wet With Gas, But I Ordered Another One Today Just In Case. Should Be Here Monday. I'm Afraid Pulling The Little Housing Will Tear The Diaphragm If It's Not Already Compromised.

Looking In My Haynes, The Only Fuel/air Mix Adjustment I Can Find Is For The Idle Circuit. I Think They Disregard The 2500rpm Result, So I'm Gonna Adjust That Too. I Just Don't Understand How/why It Could Be Running Rich. Would Certainly Explain Why I'm Only Getting 11mpg At The Moment Tho.


Left A Vm For Robbie In Case He's Got A Fsm That Describes Carb Adjustments Better Than What I Have. Does Anyone Recall How Many Days I Have To Get It Back To Acc For The Free Retest?

10

 

[jacdaw]

10

thanks

 

[jacdaw]

Today after breakfast I went back to ACC in Broomfield after cranking down the fuel/air mix screw and changing out that pesky, leaky diaphragm (last year $25 full price, this year $28 with RS discount ). But good news is it passed. Truck ran like crap driving to the test, but idled well enough once in line. No comment on how it runs now, Mr. Senator, Sir...

Odd thing, ACC said this test is good for two years, and yet last year's test was only good for one. Forgot to ask the County Clerk about that. I wish I had gotten the 5 year plate last year.