Smog help!!
02-09-2011, 07:39 PM
#1
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Model: Cherokee
Hey guys just had my jeep tested and it failed... Only part it failed was the NO section, any ideas as what it could be? Fwiw it's a 94 4.0 just replaced the engine with a low mileage one.
02-09-2011, 07:54 PM
#2
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Location: Lyons, Oregon
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Year: 1991
Model: Cherokee
Engine: 4.0 HO
probably running too lean, check your 02 sensor. I'd also check your air filter (that would make it rich though). Coach
02-09-2011, 10:02 PM
#4
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Location: So. California
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Year: 1991
Model: Cherokee
Engine: 4.0 HO
I really like my smog guy! If one of my cars/trucks fails, he tells me what it needs. I go home and fix it, bring it back, and it passes.
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