Cycling o2 reading

For discussing MicroSquirt (TM) configuration and tuning of fuel parameters (including idle valves, etc.).
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mudzuk
MegaSquirt Newbie
Posts: 1
Joined: Mon Nov 08, 2004 12:11 am
Location: New Zealand

Cycling o2 reading

Post by mudzuk »

Hi
I have just been out for the second run in the car with the mega squirt 1 ecu running . It seems to go ok , but have a few issues to dort out . ( Like work out what I am doing before I blow it up etc )
Anyway in cruise , ie no accel or decel , i get a cycling oxygen sensor reading . Have you seen this before ? What have I missed/ got set wrong ?

Its like its trying to correct itself but auto tune is off and I think it may be too much for the ego correction .

Running on a 3.9 rover , ms1 on a v3 board with narrow band oxy sensor .

Cheers

Chris
rs2000
Helpful Squirter
Posts: 61
Joined: Mon Mar 07, 2005 8:32 pm
Location: Perth, Australia

Post by rs2000 »

A narrow band will flick from lean to rich as the ego correction tries to keep it at 14.7 AFR. Typically i see it go from 1/4 to 3/4 on that bar at the bottom of megatune, so i'd say what you're seeing is normal.
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