Discussion
I have had a bit of time this morning to plug in laptop, just to see values etc.
Throttles within 2% however adaptives massive difference one side 26.3% other side -4.3%
Also under "sensor state" crank wiring is in red as is AFR 1357
Tick over 1037 rpm
I reset adaptives, tick over dropped to about 900
Went for a good run all kinds of driving
Reconnected to laptop and addaptives are the same as before reset.
I'm going cross eyed with all info on adaptives etc.
Is it a case of re-adjusting throttle pots, or is there something else I need to do.
As always all advice much appreciated
Throttles within 2% however adaptives massive difference one side 26.3% other side -4.3%
Also under "sensor state" crank wiring is in red as is AFR 1357
Tick over 1037 rpm
I reset adaptives, tick over dropped to about 900
Went for a good run all kinds of driving
Reconnected to laptop and addaptives are the same as before reset.
I'm going cross eyed with all info on adaptives etc.
Is it a case of re-adjusting throttle pots, or is there something else I need to do.
As always all advice much appreciated
The adaptives will enrich (positive) or lean (negative) the fuelling by up to 30%.
If more than +/-30% is required, an AFR error will be logged.
If the adaptives are too high, it’s because the throttle butterfly’s are allowing too much or too little air relative the throttle position sensor setting (and the resultant fuelling).
You can try setting up the engine (tuning):
- [ ] Cold engine
- [ ] Remove link bar
- [ ] With both throttles shut, set TPOTs to 14.8-15.2 - getting them identical is critical
- [ ] Refit bar but ensure TPOT values don’t change for either bank
- [ ] Refit clips but leave lock nuts loose
- [ ] Reset adaptives
- [ ] Start engine
- [ ] Get up to temperature - TPOTs and link bar will both change with temperature, so everything will move a bit
- [ ] Bring idle up to around 1200-1500rpm (this will be set to 950rpm, at then end)
- [ ] Once up to temperature, make sure TPOTs are identical - adjust them if they’re not
- [ ] The bank with the higher adaptive (more positive value) is sucking more air
- [ ] If it’s the odd bank, then lengthen the link bar (which closes the odd throttle) until adaptive is 0% and then raise the odd bank TPOT to match the even bank TPOT (this will in-turn make the adaptive more negative)
- [ ] If it’s the even bank, then record the odd bank TPOT value and reduce the idle until the even bank adaptive is at 0% - set the even bank TPOT to be the same as the odd bank. Then lengthen the link bar until the odd bank TPOT value is back to its original value (same as newly set even bank TPOT)
- [ ] Keep repeating this, bank to bank until both adaptives are identical, gradually getting closer to 0%
- [ ] Adjust both throttle pots to get a higher percentage to reduce adaptives to just below zero - both TPOTs and adaptives should be identical across banks at close to -10%
- [ ] Set idle to 950-1000rpm
- [ ] Throttles should be around 18.4% and adaptives between -10% and 0%
If more than +/-30% is required, an AFR error will be logged.
If the adaptives are too high, it’s because the throttle butterfly’s are allowing too much or too little air relative the throttle position sensor setting (and the resultant fuelling).
You can try setting up the engine (tuning):
- [ ] Cold engine
- [ ] Remove link bar
- [ ] With both throttles shut, set TPOTs to 14.8-15.2 - getting them identical is critical
- [ ] Refit bar but ensure TPOT values don’t change for either bank
- [ ] Refit clips but leave lock nuts loose
- [ ] Reset adaptives
- [ ] Start engine
- [ ] Get up to temperature - TPOTs and link bar will both change with temperature, so everything will move a bit
- [ ] Bring idle up to around 1200-1500rpm (this will be set to 950rpm, at then end)
- [ ] Once up to temperature, make sure TPOTs are identical - adjust them if they’re not
- [ ] The bank with the higher adaptive (more positive value) is sucking more air
- [ ] If it’s the odd bank, then lengthen the link bar (which closes the odd throttle) until adaptive is 0% and then raise the odd bank TPOT to match the even bank TPOT (this will in-turn make the adaptive more negative)
- [ ] If it’s the even bank, then record the odd bank TPOT value and reduce the idle until the even bank adaptive is at 0% - set the even bank TPOT to be the same as the odd bank. Then lengthen the link bar until the odd bank TPOT value is back to its original value (same as newly set even bank TPOT)
- [ ] Keep repeating this, bank to bank until both adaptives are identical, gradually getting closer to 0%
- [ ] Adjust both throttle pots to get a higher percentage to reduce adaptives to just below zero - both TPOTs and adaptives should be identical across banks at close to -10%
- [ ] Set idle to 950-1000rpm
- [ ] Throttles should be around 18.4% and adaptives between -10% and 0%
OK in man cave having a go at setting the old girl up. Taken throttle link of, and throttle cable of link so both bank butterfly's must be closed. However odd bank is reading 15.9 there's day light between the adjuster screw and stop on arm (hope that makes sense) the even bank with throttle cable released is reading this 15.5?
Do I reset throttle values then adjust up to 14.8?
Do I reset throttle values then adjust up to 14.8?
Gassing Station | Cerbera | Top of Page | What's New | My Stuff