The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 05-04-2017, 12:06 AM   #1
capone550
Junior Member
 
Join Date: May 2009
Location: Longmont, Colorado
Posts: 83
87 V3500 emissions issues

Took my truck to get emission done on it today. They failed me because of the catalytic convertor and also for the AIR injection system. I have all the factory AIR injection stuff on the truck. I recently had all new exhaust put on the truck with the exact same type of convertor that was on the truck. The guy at the exhaust shop said he installed a 3 way convertor. (I guess it's the new style of cats they are producing now) I called and talked to the tech people at the emissions place and he told me I should have 2 cats on my truck. One is called an OCR cat and the other is just an OC cat. They should be inline right before the muffler and should have a feed from the AIR pump right in between the two cats. I have looked and looked all over the internet and can not find a single V or R series truck that had this type of set up. Does anyone have an 87 or 88 R/V series truck with two cats and an AIR feed on it? Im totally frustrated because they won't pass it without the original equipment on it even if the readings are up to par.
capone550 is offline   Reply With Quote
Old 05-14-2017, 10:00 AM   #2
DieselSJ
Registered User
 
Join Date: Jun 2016
Location: Phoenix, AZ
Posts: 121
Re: 87 V3500 emissions issues

My 87 R30 had the factory exhaust when I bought it. Single cat. No air injection going to the cat - air injection went to the manifolds only. I did end up replacing the cat with a Magnaflow high flow piece and my numbers got better. I'd make the smog guy show you where it says those pieces are necessary. You should be able to determine what you need from the emissions label under the hood. Or find a different emissions station.
__________________
87 R30 CC Dually, 454, TH400
87 Jeep Grand Wagoneer, 6.5 turbodiesel, 700R4
DieselSJ is offline   Reply With Quote
Old 05-14-2017, 08:34 PM   #3
Tiger Joe
Registered User
 
Join Date: Mar 2015
Location: South of Pittsburgh
Posts: 188
Re: 87 V3500 emissions issues

I have an 87 half ton 350. AIR and there is no tube to cats and only 1 cat.

Stock exhaust was y pipe off the manifold to one big ol converter. Sounds like you need to find a new emission place
Tiger Joe is offline   Reply With Quote
Old 05-15-2017, 05:59 AM   #4
57NAPCO
Registered User
 
57NAPCO's Avatar
 
Join Date: Feb 2004
Location: Texas
Posts: 853
Re: 87 V3500 emissions issues

Quote:
Originally Posted by capone550 View Post
Took my truck to get emission done on it today. They failed me because of the catalytic convertor and also for the AIR injection system. I have all the factory AIR injection stuff on the truck. I recently had all new exhaust put on the truck with the exact same type of convertor that was on the truck. The guy at the exhaust shop said he installed a 3 way convertor. (I guess it's the new style of cats they are producing now) I called and talked to the tech people at the emissions place and he told me I should have 2 cats on my truck. One is called an OCR cat and the other is just an OC cat. They should be inline right before the muffler and should have a feed from the AIR pump right in between the two cats. I have looked and looked all over the internet and can not find a single V or R series truck that had this type of set up. Does anyone have an 87 or 88 R/V series truck with two cats and an AIR feed on it? Im totally frustrated because they won't pass it without the original equipment on it even if the readings are up to par.
I have a V30 back home but I'm away for a bit, if you still need the info when I get home I'll take a picture for ya. Mine is 100% factory original.

What happened out there in Colorado? The nazi environmentalists come out from California and take over?
57NAPCO is offline   Reply With Quote
Old 05-15-2017, 06:57 AM   #5
Dead Parrot
Registered User
 
Join Date: Aug 2012
Location: Oklahoma City, OK
Posts: 603
Re: 87 V3500 emissions issues

Call someone higher up in the emission's office. Find out what the rules really are. The local person may not know what applies to 30 year old vehicles or be familiar with what 30 year old OEM stuff looked like.

From your description, sounds like what is on my 09 Ford Escape. V6. It has a small cat right at each manifold and a larger one under the passenger compartment. That may be all that emission person has ever seen.
Dead Parrot is offline   Reply With Quote
Old 05-16-2017, 08:12 AM   #6
chengny
Registered User
 
chengny's Avatar
 
Join Date: May 2007
Location: New Hampshire
Posts: 329
Re: 87 V3500 emissions issues

Maybe due to your location (CO), your truck came classified as requiring a Federal High Altitude emissions package - or maybe it was originally from CA. Those were the only two applications for an 87 V3500 (350/454) that came up :

chengny is offline   Reply With Quote
Old 05-17-2017, 11:30 PM   #7
capone550
Junior Member
 
Join Date: May 2009
Location: Longmont, Colorado
Posts: 83
Re: 87 V3500 emissions issues

I did take the truck into the local tech Inspectors office. He did show me in their book that my truck did have exactly the system in that diagram. But he did say that the cat after the muffler didn't really do what they had planned for them to do. Because this was the first year for the cats on the HD trucks, and what we found was the only year for dual cats, they didn't have a ton of data. They put the two cats on in hopes of cleaning them up a bit for the Cali regulations.
He looked over what I had installed and gave me a waiver for the single cat. What a pain in the ass this has been. Thanks for all of the info guys!
capone550 is offline   Reply With Quote
Old 05-17-2017, 11:31 PM   #8
capone550
Junior Member
 
Join Date: May 2009
Location: Longmont, Colorado
Posts: 83
Re: 87 V3500 emissions issues

Quote:
Originally Posted by 57NAPCO View Post
I have a V30 back home but I'm away for a bit, if you still need the info when I get home I'll take a picture for ya. Mine is 100% factory original.

What happened out there in Colorado? The nazi environmentalists come out from California and take over?
This whole state is being overtaken by Californians.
capone550 is offline   Reply With Quote
Old 05-18-2017, 01:31 PM   #9
abig84
Registered User
 
Join Date: Jan 2017
Location: wheaton IL
Posts: 195
Re: 87 V3500 emissions issues

so glad illinois did away with older vehicle emissions. i had to junk my first truck due to repeated failing. it was due anyways but spent so much money trying to get a offroad truck that barely sees any on road driving to pass.
abig84 is offline   Reply With Quote
Old 05-18-2017, 11:52 PM   #10
Jstock85
Registered User
 
Join Date: Jul 2016
Location: Brandon,MS
Posts: 261
Re: 87 V3500 emissions issues

no smog down south either...
Jstock85 is offline   Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes

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

Forum Jump


All times are GMT -4. The time now is 01:10 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Copyright 1997-2013 67-72chevytrucks.com