Disabling Rich And Retard On Stock R33 Ecu

[**RB2530**]

Have you tried having the knock sensors on a switch, so they can be off when its warming up, and then turn them on once its warm. I believe it wouldn't change your power output, as its your other tricks that are giving oyu the power. As SK said this is merely fooling the ecu into believing there is no knock, so if there is no knock, in theory there should be the same outcome.

Yep thought about doin that but the switch bounce 'may' be detected as knock by the ECU....

And yep..that is all i am doing..fooling the ECU...

[**RB2530**]

pitty its not a subaru. in them if there is a knock sensor fault it pulls back timing 10 degrees while under any load..... lol

Nice one...The first post already says that any knock sensor fault (open/closed circuit) activates ignition retard...

I would say every single ECU with knock sensor capability would do this...

[**RB2530**]

Interesting.............I have a a question though. If excessive airflow on its own doesn't activate R&R why do I see rich A/F ratios and retarded timing on the dyno even when there is zero knock? The Stagea suffers from this on cold days. I run 100 ron fuel (Shell V Power Racing) with the SITC retarding the ignition and so there is no knock that I can detect, but the A/F ratios drop from high 11's down to low 9's and the ignition retards 10 to 15 degrees. Maybe the ignition cut can explain the richer A/F ratios due to the resulting unburnt fuel, but it doesn't account for the retarded ignition. The R&R isn't as severe as when there is knock, but it's still there.

Cheers

Gary

To be honest with my car on the Dyno we didn't see excessively low AFRs but I have heard of it happening...not sure about the ignition advance though...I have the Nissan consult datafiles so I will check...

[**RB2530**]

IMO there is another function in the ecu which detects excessive AFM voltage rise rate, and also exhibits similar traits to R&R, which is what results in the sawtooth power graph you see when you turn the boost up on a stock ecu.

I am running a GT30R which obviously is laggier than stock turbo...so the afm voltage rise rate would be lower at say 2000-3000rpm than with a stock turbo...Maybe the ECU monitors afm v rise rate but only in the low rpm ranges...

[NewKleer]

If you just disconnect the knock sensors the ECU gives error code 55. When ever this happens the ECU reverts instantly to R&R anyway...Also if you ground the Knock sensor signal wire it also goes to error code 55 which again reverts to R&R mode...(maybe a few people reconnecting their knock sensors about now)...

you sure its 55? 55 is the error code for 'there is no error'. 34 is knock sensor afaik.

[**RB2530**]

mmm....i thought it was the other way around.....it may be what you said...its an arbitrary number anyway...