FrankP
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| posted on 6/12/09 at 03:45 PM |
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Megasquirt and ford idle valve volts
Hi,
I am still looking at the idle valve on my ford efi manifold.
When I hook up a voltmeter to it I am seeing 5.27v at the valve.
is this correct - any one any idea what it should be.
Thanks
Frank
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turbodisplay
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| posted on 6/12/09 at 07:57 PM |
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Is that with the engine at idle?
The ecu pulses the idle valve on and off very quickly between 1,000 and 10,000 times a second.
The amount on and off (known as the duty cycle) controls how much the valve is open, at 5.27 volts the duty cycle is about 30 - 40%, which sounds
about right to maintain an idle. Your meter is avering the voltage (on it will be 14v, off it will be 0v accross the valve.
Darren
[Edited on 6/12/09 by turbodisplay]
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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FrankP
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| posted on 6/12/09 at 08:06 PM |
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Hi,
This is the engine not running but the ignition on.
Thanks
Frank
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turbodisplay
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| posted on 6/12/09 at 10:00 PM |
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Most ecus, megasquirt i think is included keeps the idle valve at a value close normal idle value.
If you listen very closely to the valve you will hear a slight buzzing sound.
If you take the valve off you may see it move from fully closed to slightly open when the ignition is turned on.
Some valves do have a tendency to gunge up- waht problems are you haveing, no idle?
Thanks
Darren
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NOTE:This user is registered as a LocostBuilders trader and may offer commercial services to other users
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FrankP
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| posted on 6/12/09 at 10:03 PM |
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Hi,
yes no idle
thanks
frank
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