Chaz
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| posted on 14/8/13 at 01:39 PM |
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Megasquirt build: I don't want PWM or IAC, what to do?
Hi there, I have got to the point of the build MS2 V3 where I need to decide if I will be using an IAC or PWM solenoid valve. I think with the number
of times I will use the car versus the benefit of installing either solenoid suggests I don't install either! i will just use a bit of throttle
to get the engine warm. Can I just miss out installing all components for the IAC and PWM on the megasquirt board? If not, then which should I
install?
Thanks in advance.
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dave_424
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| posted on 14/8/13 at 02:42 PM |
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To be honest most engines will run fine without any idle control valve. Unless you have AC that will be putting a variable load on the engine. There
is a setting in MS2 called cold advance that will bump up the ignition timing when the engine is cold which will keep the need for feathering the
throttle.
Dave
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mark chandler
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| posted on 14/8/13 at 03:00 PM |
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Nowt on mine, the cold enrichments sort the fuelling I just feather the throttle for a minute until it idles on its own.
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big-vee-twin
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| posted on 14/8/13 at 04:23 PM |
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You can miss them out, but there is a link wire which connects to the daughter board pins which is a 12v supply to serve the IAC. It is reccomened
this is installed as it helps to keep the chip cool.
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
http://www.triangleltd.com
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Chaz
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| posted on 14/8/13 at 07:52 PM |
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quote:
Originally posted by big-vee-twin
You can miss them out, but there is a link wire which connects to the daughter board pins which is a 12v supply to serve the IAC. It is reccomened
this is installed as it helps to keep the chip cool.
Great! Do you know which specific 12v inputs you are referring to? I want to make sure I'm getting the right ones. I have a quote from step 22
on the assembler guide.
"you must install a jumper from the hole marked S12C to the hole marked JS9 (+12C)". Is that the jumper you mean?
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big-vee-twin
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| posted on 14/8/13 at 07:59 PM |
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That's it I didn't fit it at first but read somewhere it was needed to stop the chip overheating so added it before I ran the engine.
Duratec Engine is fitted, MS2 Extra V3 is assembled and tested, engine running, car now built. IVA passed 26/02/2016
http://www.triangleltd.com
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ashg
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| posted on 15/8/13 at 08:44 AM |
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You can just populate the board and turn the feature off in the software, that's what I did. Pwm idle control seems to be better than stepper
from my experience.
Anything With Tits or Wheels Will cost you MONEY!!
Haynes Roadster (Finished)
Exocet (Finished & Sold)
New Project (Started)
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Chaz
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| posted on 15/8/13 at 11:38 AM |
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quote:
Originally posted by ashg
You can just populate the board and turn the feature off in the software, that's what I did. Pwm idle control seems to be better than stepper
from my experience.
That's a good idea, so simple, why did I not think of this myself! Doh!
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