jred321 said:http://www.autoshop101.com/forms/h58.pdf
open vs. closed loop, as all modern ecu's (including ours) run. it doesn't block off everything, only the o2 sensor reading to control the air/fuel mixture, which gets replaced by the value in the fuel map when the o2 sensor gets ignored. the reason s-afc wouldn't work was the voltage requirement of our maf (ours- 5-10v, s-afc- 0-5v). i can probably get ahold of an s-afc to test, just not an s-afcII.
tell 2g dsm guys that it doesn't work on obdII. the issue isn't whether it works on obdII or not, it's whether it works on our ecu's. the obdII has nothing to do with it.xelderx said:This is all going to come back to the Apexi not working on the OBDII ECU's. You can hook it up and it will display all the right information but it won't gain you any performance at WOT and maybe (and its a big maybe)...barely noticable performance anywhere else. I believe that this battle was lost before it started. We need that OBDI ECU like nobody's business.
tell 2g dsm guys that it doesn't work on obdII. the issue isn't whether it works on obdII or not, it's whether it works on our ecu's. the obdII has nothing to do with it.
flat_black said:Looks like I'd have to go with a new MAF for this setup... Which the stock ECU wouldn't be able to read from, and I couldn't cheat and make the S-AFC II talk to the ECU at the right range, either.
Here are two options that look to be costing about the same as doing an entire new setup using the S-AFC, which looks to be in the 1k range. Here are the other ECU related options:
1) Perfwork's ECU (Quoted at 675 for the ECU), plus the 80mm MAF (325), plus the price to make an 80mm ID CAI extension, which would kill the air velocity, since I'm going N/A, and not FI.
2) HiBoost's ECU, tuned for N/A. Quoted at 1060$ for the Haltech E6k with wiring and signal harness, plus $50 for a MAP sensor, eliminating the need for a MAF at all, and allowing me to keep intake velocity.
My brain is killing me, trying to think out all my options. x.x
since when does an on board diagnostics = an entire ecu? it has nothing to do with the fact that our ecu is obdII, it's just our ecu. and obdII in a dsm=obdII in our car. the ecu's themselves are different. all ecu's are obdII compliant, not controlled by obdII.xelderx said:I could care less what the DSM guys have. OUR OBDII will not allow the S-AFC to work properly. I didn't feel like I had to clarify what car's ECU I was referring to since this is a Mazda forum. The OBDI out of the J-spec Mazdas works fine. Don't tell me its got nothing to do with OBDI or OBDII. Maybe over in Eclipse world it doesn't matter, but as far as everyone reading this is concerned...Our OBDII ECU will not allow the Apexi to do its job. End of story.