need smog help
need smog help Hey guys need help with figuring out what I need to pass smog...car is a 95 Trans am lt1 k&n intake,bbk shorties are the only mods besides muffler delete....here are the test results
Your O2 level should be around 1% and its 3.9% you have high NOX which is high cyl temp id say looks like a lean miss fire. The HC are high due to the misfire put a scanner on it and see what the LTFT or block learn are and post em up.
Alright cool thanks I'll have to check in the morning after work....there are no check engine light that would indicate anything so I'll get a scanner from AutoZone and see if that shows anything....
Well 95 is a goofy year obd1 with an obd2 connector unless you have an open or short to ground on a sensor its had to set a ses light. Your best bet is to get someone with a scanner besides autozone and look at fuel trims maybe clean your MAF as well
Trending Topics
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo Ok I did a quick cleaning of the maf and check the elbow...no rips everything seems fine....still gotta find a scanner to see if anything shows up...I did notice extra heat on the driver side i'm assuming from the headers....seems hotter than normal tho...
Been doing some tune work....did plugs and wires...cleaned filter checked timing oil change Trans flushed and still noticed a miss...anything? I used single platinum AC Delco spark plugs...pretty sure I should use double...but it was laying around..I just threw them on...
TECH Resident
Joined: Nov 2011
Posts: 812
Likes: 0
From: NJ
low co2 too.......either cats removed, or dead. also, depending on the type of cat, the high nox could be a cat problem too.....but most likely an egr problem.
Last edited by 1ltcap; Apr 12, 2012 at 02:27 PM.
