Rising Sun Member Forums  

Go Back   Rising Sun Member Forums > Toyota 4x4 > General Tech Forum

Reply
 
Thread Tools
  #1  
Old 08-28-2006, 01:06 PM
BananaQuaalude BananaQuaalude is offline
Rock Stacker
 
Join Date: Aug 2006
Location: Boulder
Posts: 4
Default FJ60 Failed emissions - Carbon Monoxide too high

Hello,

I have an '86 FJ60 that failed the CO portion of the emissions test. Limit is 40 and I registered 108 (I don't remember the units).

The truck has had extensive work in the last 3 months fixing oil leaks (oil pan gasket, rear main seal, side cover gasket, oil sending unit) as well as a general tune up that replaced every hose under the hood, new spark plug wires, and numerous other items. I don't think compression is the problem.

I am new to this vehicle and I haven't had a chance to poke around on this particular problem, but I'm guessing the fuel mix from the carb is too rich. Can anyone recommend a manual or web site that will tell me how to adjust the carb to add more air?

I need to know what to look for to determine if this is the problem. I would rather fix this myself than pay a shop $500 to adjust it for me.

Some info about the truck:

2F engine
147K miles
stock carb
running 87 octane
oil changed 2 month ago - I run synthetic
choke works fine, I have to use it to start first time each day
Reply With Quote
  #2  
Old 08-28-2006, 01:39 PM
CardinalFJ60's Avatar
CardinalFJ60 CardinalFJ60 is offline
Rising Sun Member
 
Join Date: Aug 2005
Location: Lafayette
Posts: 1,579
Default FSM (factory service manual)

I have the FSMs, and there is a troubleshooting guide (in the emisssions manual, I believe) that gives some guidance on what the high CO reading could mean. I don't have it with me, but I bet someone on the board might.

sorry I couldn't be more help.
Reply With Quote
  #3  
Old 08-28-2006, 01:44 PM
MDH33's Avatar
MDH33 MDH33 is offline
Rising Sun Member
 
Join Date: Mar 2006
Location: Land of Corn
Posts: 5,786
Default

I would recommend getting the Field Service Manuals (FSMs) from Toyota for your specific model. Get the 2F manual, chassis manual and the emissions manual. You can order them from this number, which is the Toyota Publications Dept.
EDIT: 1-800-622-2033

Begin by checking all of the emissions equipment and vacuum tubing under the hood. Many times, the vacuum lines have been connected incorrectly by mechanics unfamiliar with the "spaghetti". The 2F manual will help you with any carb adjustments.

If you have more specific technical questions, you might want to try posting them in the FJ60 technical section on the IH8MUD.com forum.

Good luck!
__________________
--Martin

'85 FJ60

Last edited by MDH33; 08-28-2006 at 05:48 PM.
Reply With Quote
  #4  
Old 08-28-2006, 04:48 PM
BananaQuaalude BananaQuaalude is offline
Rock Stacker
 
Join Date: Aug 2006
Location: Boulder
Posts: 4
Default

Thanks Martin and CardinalFJ60.

I've got the emissions manual on order.

BTW - the number for Toyota pubs is 800-622-2033. The number above is something else.

I'll be working on it this weekend, so I may have more questions. I appreciate the help!
Reply With Quote
  #5  
Old 08-28-2006, 07:47 PM
60wag's Avatar
60wag 60wag is offline
Rising Sun Member
 
Join Date: Aug 2005
Posts: 1,792
Default

The air injection system (air pump, cat converter and a bunch of diverter valves) has to be working to get the CO down. Its possible that there is something else wrong but I'd start with the AI stuff. In my experience the air pumps run on the low side of the Toyota spec for output. The cat is likely weak from many many miles. The combo can make it tough to pass the test. There are a couple of jumbo check valves that are suposed to keep hot exhaust gas from backing up into the AI system. The check valves tend to rot out and the exhaust can trash the rubber diaphrams in the Air Bypass Valve - that's the fancy diverter assembly mounted on the drivers side fender. That thing has to be working for the output from the air pump to get where it needs to go. The Toyota Emissions manaul has all the details for checking all of the emissions systems.
Reply With Quote
  #6  
Old 08-29-2006, 09:47 PM
BananaQuaalude BananaQuaalude is offline
Rock Stacker
 
Join Date: Aug 2006
Location: Boulder
Posts: 4
Default

Thanks for the input 60wag--

The catalytic converter looks brand new. The guy that had this truck before me spent a lot of money updating things. The carb is either new or rebuilt and almost every hose under the hood is new and on tight.

I did notice, however, that two of the hoses on the vacuum piping seem to be switched. Not sure how much of a difference that makes, but from what I've read in forums it's not uncommon.

Also, the air filter was very dirty. When I popped the cover off, there was a 3" piece of vacuum tube inside with the filter, and the filter itself had an unusually high number of bees in it. It's an K&N though, so I bought some cleaner and removed a fair amount of dirt from it.

I should have the emissions manual tomorrow. My plan at this point is to

1) change the oil
2) oil the air filter and put it back in
3) switch the incorrect vacuum piping
4) go to the Toyota dealership in Boulder (where I've spent several hundred dollars) and see if one of the mechanics will show me how to adjust the carb's air intake
5) take a look at the 'jumbo check valves' you mentioned that will be in the book and see what kind of state they are in

Unless I see something wrong with one of the check valves, I'm going to retest after completing steps 1-4.

Thanks to everyone for their help! I'll post how it turns out.
Reply With Quote
  #7  
Old 08-29-2006, 09:59 PM
wesintl's Avatar
wesintl wesintl is offline
Hard Core 4+
 
Join Date: Aug 2005
Location: in da house
Posts: 7,558
Send a message via AIM to wesintl
Default

While that stuff can help I don't think it's going to get you to pass. we'll, maybe #4

Doesn't high CO usually mean it's running rich?

The mix screw is at the base on the engine side. The screw facing the firewall is the idle. Idle is 650 and vac is 16.5. I've always timed adjusted the carb and used the vacuum to set mine. I've had vacuum over 20 and timing as high as 16, you might be best off with factory 7* for emissions though.It's pretty tricky and not the easyiest thing to get down til you do it a while. I'm probably not that good anymore since i've been driving fuel injection for the last 4 years.

Search here there were a couple recommended places to go get emissions test where the tester would tinker with the carb to get the correct results.
__________________
See you on the trail
WREK
Couple o' FJ40's, BJ70, UZJ100, TDI 66FJ40,82FJ60,97FZJ80
TLCA#4180

Last edited by wesintl; 08-29-2006 at 10:21 PM.
Reply With Quote
  #8  
Old 03-21-2007, 12:56 PM
BananaQuaalude BananaQuaalude is offline
Rock Stacker
 
Join Date: Aug 2006
Location: Boulder
Posts: 4
Default Update on emissions

Just an update for anyone who may be having the same problems as I did (still have).

I ended up getting a waiver for the FJ60 and got plates. I had to show I spent more than $715 directly on the emissions system, and have an emissions specialist at the DMV look at it to see if they could solve anything. I had a friendly mechanic print me a bill for over the amount (which I don't feel bad about because I WILL make this thing run right... eventually. And I was pretty close that number anyway (new 02 sensor, carb rebuild).

But for anyone who fails emissions with a Land Cruiser more than twice in the Denver area, you can go to the Broomfield Emissions Center and see a guy named Joe Lavonas. In about an hour, he told me more about the emissions on an FJ60 than I got from anyone else or figured out on my own in the previous 9 months I owned it.

In my case, and apparently this is quite frequent, the PS pump had a pulley that didn't track right, causing the PS pump to go bad and eventually leak. When a PS pump on an FJ60 leaks, it goes down into the air pump, which then starts to chew itself up and spit out particles into the hoses and check valves it supplies with air.

I just had a re-manufactured PS pump installed, so I have solved the root of the problems. At this point I have to replace the air pump, one of the check valves, and about 3 or 4 hoses and it should fix the it. The rest of the emissions system seemed fine when we isolated pieces to check their pressure.

Joe sees Land Cruisers of all years all the time, and knows what to look for to find the problems. Like I said we narrowed mine down in about an hour.

I don't think you can make an appointment with him unless you have the paper work showing you failed 2 emissions tests, but if you're in that boat he's definitely the guy to see.

How this helps anyone else in the same situation.
Reply With Quote
  #9  
Old 03-21-2007, 01:31 PM
corsair23's Avatar
corsair23 corsair23 is offline
Rising Sun Member
 
Join Date: Jul 2006
Location: Littleton
Posts: 8,697
Default

GREAT follow up information! Thanks for sharing
__________________
Jeff Z. (the "not quite as skinny" one)
TLCA #17037
'97 LX450 - aka "The Whale"
'97 FZJ80 Antique Sage AE #267, stock
12/74 FJ40, 2F, SM420, 4" Lift, ARBs, 33" MTRs

:

"...anything else i can do for you guys, how about i wash your car or mow your lawn while you figure out your firewall system? I am now boarderline insane/unibomber." Kipper

"That assumes I'm even capable of pulling and stabbing..." Jacket

"I really like having a detachable unit." Beater
Reply With Quote
  #10  
Old 03-21-2007, 02:57 PM
wesintl's Avatar
wesintl wesintl is offline
Hard Core 4+
 
Join Date: Aug 2005
Location: in da house
Posts: 7,558
Send a message via AIM to wesintl
Default

That is great follow up for a reference here.

Thanks BQ
__________________
See you on the trail
WREK
Couple o' FJ40's, BJ70, UZJ100, TDI 66FJ40,82FJ60,97FZJ80
TLCA#4180
Reply With Quote
Reply

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


All times are GMT -6. The time now is 11:45 AM.


Powered by vBulletin® Version 3.7.1
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.