I was wondering if there is a computer fooler module or something you have to use if you are using a test pipe. I know if you do nothing the ecu throws a code. I am not sure though if the a/f ratios will be screwed up or if the car will suffer any tipe of damage by using a test pipe. Could someone address those two subject matters? Thanks!

 

The only code(s) thrown from a test pipe will be emissions related. They are simply there to inform you of a failure in your emissions system. The ECU does not use the readings from the Secondary O2 for anything to do with it's fuel delivery. If you are comfortable with a CEL being on you can drive the car without a Secondary O2 properly hooked up. The are some O2 simulators that people on the board have installed but I do not beleive that there is one yet that has worked on each S2000 it was tried on. Seems to be hit or miss.

 

would it really be an issue on an N/A car to keep the cat?

 

not really an issue. it's there for a reason, to meet emissions regulations. however, most say it's very free flowing but after checking it out myself, I beg to differ. The gains from removing on FI set-up are more worth it than N/A unless there are mods and aftermarket tuning in mind.

 

REMOVE the ecu reset fuse

no codes
no problems
no back pressure
save 15lb of weight

consider Mugen ecu just emliminates the sensor...what is the big deal??

remove the fuse

you will be happy

I sure as hell am

Damn Brian...you want me to spend 10 a quart on Ester oil from switzerland...and tell me trust you
why cant you trust me on this test pipe thing????

 

you mean by taking out the ECU reset fuse, it will not let the secondary O2 sensor work and I will have no check engine light because of it?

 

no, basically the reset fuse will keep resetting the ecu after each start. Only downside is a slightly shifting idle and the loss of memory for the AC defroster.

 

yes those are only down sides...also no beep beep when key is in ignition

I have had NO irratic idel


great mod a few hp from a dyno and lurker said so
plus save at least 10 pounds

if you live in a smog check place

plug ecu back in, put cat back on, and run about a tank full of gass..so computer remlearns things for smog check

i think its worth it

 

Are you sure those are the only downsides of removing the fuse? What if I run a tuned VAFC? Do step pipes smell?

 

i have a spoon test pipe and it smells illegal