Hello all. First, just want to say I love this site. Lots of great people sharing knowledge and the information within this site is invaluable!! That said, I need some advice....
I've got a 94 Mazda B4000 (4.0l OHV) - when I purchased it 4 months ago, this thing was a dog. It barely ran!! I took it to get inspected and of course, it failed. Results below -
.....but thanks to the people on this site, I was able to diagnose and replace the following....MAF, intake manifold gaskets (upper and lower), IAC, plugs, plug wires, & coil pack. I've also removed and cleaned the throttle body. HUGE improvement - truck runs great!!! Still has a small miss but I think its my air intake tube (cracked where it connects to the throttle body).
I took it in to get inspected last Tuesday and I was shocked that it failed again. Results below -
Here's my question. What else can I do to adjust/correct the HC levels @ 15mph and the NOx levels?