Need Advice as to Why 89 Iroc Failed CT Emissions
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Junior Member
Joined: Mar 2005
Posts: 1
Likes: 0
From: Connecticut
Car: 89 IROC,69 Pace Car,2001 Blazer
Engine: (2) 350's, v6 in Blazer
Transmission: 69 4 Speed, 89 Auto
Need Advice as to Why 89 Iroc Failed CT Emissions
Can anyone tell me what repairs I might make to my 89 350 IROC after it failed the NOX part of its Emissions test? It runs great with no Check Engine codes,and had Emissions Pass additive in Fuel Tank Prior to test.Please email me at billsuebarbuto@hotmail.com with any ideas. Thank You!!!!
Senior Member
Joined: Aug 2001
Posts: 814
Likes: 2
From: San Jose, CA, USA
Car: 88 IROC-Z - original owner!
Engine: LB9 with K&Ns, MSD, Foil, Taylor
Transmission: WC T-5
Axle/Gears: BW 9-bolt, 3.45 posi
High Nox usually indicates an EGR problem. Replace your EGR valve and solenoid.
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mustangman65_79
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Aug 11, 2015 03:17 PM
