RB26 engine and problem in knock sensing.

Testing and development of Megasquirt 3

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masterx81
Master MS/Extra'er
Posts: 776
Joined: Mon Oct 25, 2004 7:36 am
Location: Asti - Italy

RB26 engine and problem in knock sensing.

Post by masterx81 »

Hi!
I'm tuning an RB26 engine, and i have noticed a strage thing. Sometimes the knock is not read and the value one ore more cylinders remain "stuck".
I attacch the composite log. On second 426 of the log you can see what i mean.
Plus the engine seem to run a bit "rough", and i have really few occasional lostsync that i can't get rid of (but i'm working on the hardware to improve this).
Any ideas?
Firmware 1.5.0...
Edit: I've noticed also that the lost sync reason (524.8 in log) is 65, but i can't find what mean this code (in the ms3 manual i find only 62...63...68...69, i miss 65)
Thanks!
Enrico
Opel/Vauxhall Corsa GSi MS2
Subaru v4 EJ20 MS3
whittlebeast
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Re: RB26 engine and problem in knock sensing.

Post by whittlebeast »

I noticed a few things in your log

Your battery voltage looks low
Your EGO control is turned off
At about 443 sec in the log, the MAP goes into oscillation normally indicating boost controller issues.
You may have the AE turned up a little too high
Your injectors my be a little too large. Max DC is like 42.

Andy
masterx81
Master MS/Extra'er
Posts: 776
Joined: Mon Oct 25, 2004 7:36 am
Location: Asti - Italy

Re: RB26 engine and problem in knock sensing.

Post by masterx81 »

This is not the definitive tune, i'm trying to fix all the problems before finalizing the tune, dc is low because i plan to add some pressure :)
But, for the problem of the knock? It's really strange....
Enrico
Opel/Vauxhall Corsa GSi MS2
Subaru v4 EJ20 MS3
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