failed nox emission testing

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Nov 26, 2005 | 09:48 AM

#16

Wildpony2000

Mountain Pass

Joined: Jul 2005

Posts: 113

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I had an 87 firebird that had lots of trouble passing California emissions because I drove it so little. Spent lots of $$ on that. Next time, same thing. I solved this issue by going to Pep Boys, bought a product called "Guaranted to Pass Emissions Test Formula Advanced Fuel Treatment". Ran half a tank out and all kinds of soot came out the pipes. Took it up for a pretest with it still in the tank and it passed like it was a new car. Last year I used it on a 1 ton truck I inherited that'd sat 3 years, it passed 1st try. This stuff sells for $6-$8 and I'm a believer.

Nov 26, 2005 | 02:40 PM

#17

BinaryWhisper

Freshman User

Joined: Nov 2005

Posts: 40

Likes: 0

Quote:

Originally Posted by Bart99GT

If the vehicle has no knock sensors then the computer can't retard timing

As soon as I read that I realized what was missing from my thought process of how it worked. My MX-6 for instance would change the timing as you watched but it did have a knock sensor and that makes perfect sense once you explained it.

Good post, very imformative, thanks

Quote:

Wish me luck guys, I'm about to take my Ranger to get tested right now!!

good luck

Steve