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Hi , these 3 models of valve.
0280140545 ,,,,,, 0280140525 and the one on the picture ,, what kind are they ?
Idle solenoid PWM or idle solenoid PWM inverted or stepper ? idle valve e28 m535.jpg
I'd imagine they may well be called a whole load of names - cold air valve, cold idle boost ETC. If it matters to call it the right name, research some diagrams for bosch K jetronic injection and see what bosch call it.
[QUOTE what kind are they ?
Idle solenoid PWM or idle solenoid PWM inverted or stepper ?[/QUOTE]
They are none of these, they're not for idle, they're not PWM, they're not stepper, they are good old fashioned analogue. As Alex says they are for warm up and during that time they supply extra air which also will cause extra fuel since the fuel flow flapper will be opened more by the extra air flow.
Great info ,, so i have to change my idle valve.
Have that on my picture above 20210511_114520.jpg
I have these 2 ... the left one -0280140524 ..... the right one .. 0280140545.
They are both 3pins.
How do i check them if they work before i install and how is the wiring on the pins ?
I supose that you mean that these more of a idle solenoid ?
What brand and what do people buy when building a new engine ?
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