High BLMs but high HC ... failed emissions
06-02-2015, 06:23 PM
#1
Member
Thread Starter
iTrader: (1)
Join Date: Feb 2013
Location: Tijeras, NM
Posts: 150
Likes: 0
Received 0 Likes
on
0 Posts
Car: 89 Black GTA
Engine: 'close to' stock 5.7 but trending>>
Transmission: 700
Axle/Gears: 3.27
High BLMs but high HC ... failed emissions
at 2500, my HC is 111. Max on the test is 200.
But at idle which is 750, the HC is 1300! Max is 200.
My BLM at idle is 131, at 2500 its 134.
How could this be?
Could the cat be bad? Could there be an oil leak somewhere - though I dont know if that would affect idle HC since the O2 sensor would pick it up and show it.
Huh??
But at idle which is 750, the HC is 1300! Max is 200.
My BLM at idle is 131, at 2500 its 134.
How could this be?
Could the cat be bad? Could there be an oil leak somewhere - though I dont know if that would affect idle HC since the O2 sensor would pick it up and show it.
Huh??
06-03-2015, 07:38 AM
#2
Re: High BLMs but high HC ... failed emissions
I think the O2 is on the driver side on thirdgens? In which case, I'd check the ignition components on the passenger side.
06-03-2015, 08:48 AM
#3
Supreme Member
Re: High BLMs but high HC ... failed emissions
May want to consider your cam overlap and read up on O2 window settings.
06-08-2015, 10:26 AM
#4
Senior Member
iTrader: (3)
Join Date: Nov 2007
Location: Salt Lake
Posts: 844
Likes: 0
Received 2 Likes
on
2 Posts
Car: 1989 IROC & ROLL-Z
Engine: L98 Vortec FIRST TPI
Transmission: T56, Mech Speedo
Axle/Gears: G92 J65 3.27
Re: High BLMs but high HC ... failed emissions
Not sure what Cam you have...
May Consider this..
https://www.thirdgen.org/forums/diy-...ome-those.html
May Consider this..
https://www.thirdgen.org/forums/diy-...ome-those.html
Thread
Thread Starter
Forum
Replies
Last Post
Hotrodboba400
Firebirds for Sale
3
12-10-2019 07:07 PM