Chevota Emissions Help
04-29-2003, 07:17 AM
#1
Registered User
Thread Starter
Join Date: Apr 2003
Location: Seattle
Posts: 373
Likes: 0
Received 0 Likes
on
0 Posts
Chevota Emissions Help
So I got an '89 Toy P/U with an '85 4.3 L Chevy V6 and a quadrajet carb....not passing emissions. Does anyone have any thoughts on how to lower emissions a few %? 
04-29-2003, 09:47 AM
#7
Registered User
Thread Starter
Join Date: Apr 2003
Location: Seattle
Posts: 373
Likes: 0
Received 0 Likes
on
0 Posts
Seeing as how I do not have that print out, are there general tips/tricks for reducing emissions. The carb has already been tweeked. Not sure what else would help. redline fuel system cleaner, maf sensor clean...? Is there a way to test to see if cat is blown without removing it? Probably not, but thought I would ask.
Trending Topics
04-29-2003, 09:53 AM
#8
Contributing Member
Join Date: Jan 2003
Posts: 10,916
Likes: 0
Received 0 Likes
on
0 Posts
Tweeking the carb could be part of the problem. You may want to have the O2 sensor tested also. Running rich can contribute to failed emissions, and possibly a failed cat over time.
What type of cat do you have on there? Is it the original cat from Toyota, or did you use one from Chev?
You can try a product that will clean the combustion chamber, but that probably wont get to the root cause of the problem. Are you pretty handy with motors? If not, then you may have to have this problem diagnosed by a professional. There are just too many variables, and the last thing we want to do is send you on a wild goose chase.
What type of cat do you have on there? Is it the original cat from Toyota, or did you use one from Chev?
You can try a product that will clean the combustion chamber, but that probably wont get to the root cause of the problem. Are you pretty handy with motors? If not, then you may have to have this problem diagnosed by a professional. There are just too many variables, and the last thing we want to do is send you on a wild goose chase.
04-29-2003, 10:09 AM
#9
Registered User
Thread Starter
Join Date: Apr 2003
Location: Seattle
Posts: 373
Likes: 0
Received 0 Likes
on
0 Posts
The cat is original toyota, and I am good with working on ford engines and partial toyota, so this chevy shouldn't be a prob. I guess its just gonna have to be trial and error time. The only other thing I can think of is to overhaul the valves and piston chambers. Thats easy enough. I love old engines that you only need to take out a few bolts and springs and the thing almost just falls apart. Thanks for the insight...
04-29-2003, 05:02 PM
#11
Contributing Member
Well, in Washington you could fail on:
HC this is hydrocarbons=unburned fuel
CO This is carbonmonoxide
CO2 carbonDioxide=text for nonleaking exhast
Is it a stock 4.3? out of what (and the year)
What is the carb from?
Camshaft stock to engine or aftermarket
Emmissions stuff hooked up to the 4.3? O2 sensor installed and working with a GM computer?
HC this is hydrocarbons=unburned fuel
CO This is carbonmonoxide
CO2 carbonDioxide=text for nonleaking exhast
Is it a stock 4.3? out of what (and the year)
What is the carb from?
Camshaft stock to engine or aftermarket
Emmissions stuff hooked up to the 4.3? O2 sensor installed and working with a GM computer?
Thread
Thread Starter
Forum
Replies
Last Post
kawazx636
The Classifieds GraveYard
34
10-06-2021 03:03 PM
Boomer8404
86-95 Trucks & 4Runners
0
09-24-2015 01:12 PM
