still chasing some idle problems. I've managed to stabilise the idle but now the problem I have is the rpms dropping off when the fan cuts in and/or you quickly press the throttle while the engine is under the extra load from the alternator.
can be very annoying if you are pulling out of a junction and you give it a little revs to pull away and the fan cuts in. when the revs come back down they bog and stumble for a couple of seconds then pick up again.
if I switch everything on ie fogs, rear window heater element, seats, elec windows I can replicate the same load as the fan cutting in.
not sure whats causing this, ive disabled EGO correction, ign based idle and PWM\PID idle control and tried and it still does it. so Im running out of options. Maybe a simple setting somewhere that I don't know about thats hidden in a different menu other than idle\starting.
All the fuel bins around idle are ok with the ones in the "stumble" area richened up a bit which seems to help. The MAT sensor is taken out of the situatuation while diagnosing.
All the things that are disabled have there figures set to 0 to make sure they are not interfering.
Ignition is advanced below idle speed so when it drops down the ignition and extra fuelling can help bring it back in line but it's not enough.
when the fan isn't running and I just have the lights, stereo and heater fan inside on it's ok, drops off a little but nothing major, about 50-100rpm max then stabilizes straight away. As soon as the fan cuts in the lights dim a little and the revs play havoc if I disturb them from rest.
Any ideas?
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