VSV6 ECU weird goings on.

[Mamba]

Hi Brett...I also have a 1995 VS V6 BSTK memcal...with the help of members (Dec_head for the memcals, Holden 202, VL400 advice and assistance) I tried changing memcals (BWPJ) and found sinilar issues (see Delco probie)...the last post was from a member correctly pointing out how the O2 sensors were out (but at least shift points were smoother)..I never did solve the O2 sensor issue even after replacing both and earthing them (auto elect)....the car idles and cruises fine but has a lousy acceleration with the BSTK memcal....an automotive tech told me that even though the memcals were replaced, the car is usually runs better with the original ecu and memcal...

[brett_jjj]

G'day mate, I havent found out why it happens yet.Ive tried the 02 sensor earthing thing a couple of different ways now, and I just get bad or non existant 02 sensor readings unless I go back to the BSTK bin file.The car runs absolutely fine,and with excellent 02 sensor crosscounts and readings on the BSTK version. Ive done a few things to my BSTK file like changed the timing etc and it runs normally as you would expect it should.I havent had any slow acceleration or pickup problems like what you mention.I just wanted to use the latest VS memcal BIN (CKUL) as a base for my own chip settings.But Ive had to stick with the BSTK version because of the 02 sensor reading problem and the error codes setting with the newer bin files.Id really like to know why this happens.

[The1]

late reply but now that ive been working on the xdf i can say it's an issue with crosscount voltage,

BRHP & BTXP had voltage limits of 600mv lean & 610mv rich, so a crosscount would happen when lower or higher than that, were as the newer bins had 270mv lean & 750mv rich. it would be basicly forcing richer mixture i would think as 605mv would be what it thinks it stoich when really it's around 14.5 AFR.