Failed Smog due to NO (PPM)
08-14-14, 09:49 PM
#1
Junior Member
Thread Starter
Failed Smog due to NO (PPM)
Just bought the car (1995 Rx7), I will put some time into a proper introduction in the new members forum asap.
Tried to Smog the car today and it failed with a 15mph NO measure of 1017 PPM vs 704 PPM Max. Tech speculates it could be a faulty o2 sensor causing car to run lean.
Records show the car got a full tune up at Tri-Point Engineering in 12/11 with 78,348 miles which included plugs and o2 sensor followed by a Smog Pass. Back then it measured 670 PPM at 15mph.
Today, almost 3 years later but with only 300 additional miles it's a very different story. Can the o2 sensor fail after so few miles but that long just sitting around? Looks like an expensive unit that was used at tune-up.
I'm about to buy an NGK unit for like $25 but thought I'd check with the brain trust here before placing the order.
Thanks much.
L T
Tried to Smog the car today and it failed with a 15mph NO measure of 1017 PPM vs 704 PPM Max. Tech speculates it could be a faulty o2 sensor causing car to run lean.
Records show the car got a full tune up at Tri-Point Engineering in 12/11 with 78,348 miles which included plugs and o2 sensor followed by a Smog Pass. Back then it measured 670 PPM at 15mph.
Today, almost 3 years later but with only 300 additional miles it's a very different story. Can the o2 sensor fail after so few miles but that long just sitting around? Looks like an expensive unit that was used at tune-up.
I'm about to buy an NGK unit for like $25 but thought I'd check with the brain trust here before placing the order.
Thanks much.
L T
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