Hi guys,
my friend installed the GT-One headers and GT-One Titanium (the same as Vancehu) without any cats ...it's a 91 nsx.... and... the CEL lights up...sometimes it takes a good half hour of driving arround, others it takes about 30s. The code is for O2 sensor.
the sensor was replaced but the problem persisted.. we switched the O2 from one bank to another and the problem persisted on the same bank..
we then checked CO emissions, and the good bank showed a reading of "1,5" and the bad one read "6" 
lot's of gas on that one...
what was my line of thought???... lot's of gas...so...i think it can be 1 or more of the following:
1 - bent or burnt valves
2 - injector malfunction
3 - coil pack malfunction
4 - spark plug malfunction
number 1 is out because a compression test showed a perfect match between all 3 cylinders
tomorrow we will take out the injectors to have them tested
new spark plugs will be installed
will test the coil packs (have new ones and my own ones to test)
i ask you guys what you think of what would the problem be and if my thoughts are good ones
thanks very much,
Nuno
