'92 1.6 fluctuating idle with Idle valve plugged in
#1
'92 1.6 fluctuating idle with Idle valve plugged in
I've got my car to idle on the MS at a steady 950-960rpm but im struggling in getting it to idle with the valve plugged in.
Without the valve plugged in it will hold a steady idle a 950-960rpm. When i plug the valve back in though the idle will fluctuate between 900 and 1100rpm every 2-3 seconds after coming to a stop or touching the throttle.
The valve settings im using are below as recommended by reverant:
Also attached a short datalog i did. It starts with the valve plugged in and then you can see the idle becomes steady when i unplug the valve.
Any suggestions on what might be causing the unstable idle?
Without the valve plugged in it will hold a steady idle a 950-960rpm. When i plug the valve back in though the idle will fluctuate between 900 and 1100rpm every 2-3 seconds after coming to a stop or touching the throttle.
The valve settings im using are below as recommended by reverant:
Also attached a short datalog i did. It starts with the valve plugged in and then you can see the idle becomes steady when i unplug the valve.
Any suggestions on what might be causing the unstable idle?
Last edited by Valentinik; 02-20-2011 at 07:35 AM. Reason: Corrected information
#2
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I'm on my iPhone so can't see the log, but are AFRs steady? If not that'll cause idle instability, as will if it's too lean.
if the above are good, try reducing I and P until idle is steady.
if the above are good, try reducing I and P until idle is steady.
#4
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Yeah so you need the AFRs to be steady as the rpms are higher/lower it's a very tricky balance I still haven't nailled it.
Set it to open loop and tune the AFRs to be consistent in-between the idle target areas I.e. 900 rpm -1200rpm
Set it to open loop and tune the AFRs to be consistent in-between the idle target areas I.e. 900 rpm -1200rpm
#6
i tried pwm warmup and the afrs were still just as stable as with the valve unplugged, only in closed loop they were fluctuating
I switched back to closed loop and tried brain's settings and it seems to sit around 930-950 which is a lot better. I'l give it a try during the week from a bone cold start but its a huge improvement.
Thanks Braineack
I switched back to closed loop and tried brain's settings and it seems to sit around 930-950 which is a lot better. I'l give it a try during the week from a bone cold start but its a huge improvement.
Thanks Braineack
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