- Mon Mar 20, 2023 8:50 am #61974
PSIG wrote: ↑Fri Mar 17, 2023 10:41 pm I don't recall or missed the bank vacuum differential thing. Is the engine hurt or something? I wouldn't worry about '85 Honda being too sophisticated based on when we used other Honda pre-OBD stuff. It's amazing how crappy simple but proprietary some OE stuff was back then.You'll have to search back for the pics:
A couple of other issues I have had over the years and never to be resolved is balancing the two cylinder banks, cannot balance the cylinder on one side. I have never had better than 9" of HG (in the red zone) regardless of what I did:I only have experience of Densos back to around 1987 but they have better resolution, separate idle tables, more corrections and they are coded much more efficiently so there probably isn't a speed advantage either. I'm not saying that they are too sophisticated just not as crude as a Speeduino.
Cylinder Bank Balance.jpg
Cylinder Bank Balance.jpg (84.9 KiB) Viewed 574 times
The vacuum gauge indicates that when the reading is in the red zone, it is "late valve timing, or leak at intake manifold or next riser". More than 15" of vacuum and it indicates late timing. Vacuum should be in the 10" to 14" of HG range.