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1973 Javelin EGR Vacuum sensors |
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dsm6678
AMC Nut Joined: Jan/08/2012 Location: Mid Atlantic Status: Offline Points: 478 |
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Posted: Aug/09/2012 at 4:38pm |
There are two sensors for the egr valve called a low and high temperature vacuum signal modualtors. I just got a pair of used ones and they were very hard to locate. I noticed they have a metal mesh screen on the back of them. I want to clean them out but I do not want to damaged them in anyway. I do not really know what is inside or how they work.
I was thinking of using gum cutter and some compressed air (lightly) but I am not sure if that is such a good idea.
I was thinking soapy water may be less likely to damage anything.
Does anybody know how these things work, what is inside and why there is a mesh screen on the back? And if they should be cleaned out in some way?
thanks,
dm
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5905 |
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There's a free online 1973 TSM here:
In section 4 it talks about the Vacuum Signal Modulators, it reads like they're
a themostatically controlled vacuum "leak" making the screens an inlet air filter.
Wonder if they have an internal bimetalic opening element or what.....
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dsm6678
AMC Nut Joined: Jan/08/2012 Location: Mid Atlantic Status: Offline Points: 478 |
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Thanks for the info. What should I clean the screens with? Any ideas? |
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PHAT69AMX
AMC Addicted Joined: Jul/07/2007 Location: West Virginia Status: Offline Points: 5905 |
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Difficult to say not knowing what they have internaly. Are they Sintered Bronze or just Screen ?
Brake Cleaner cuts about anything and cleans well, but could be "harsh".
Agree just good ol' hand soap and water or Dawn dish soap works pretty well with a toothbrush
and is pretty safe to use, then blow out with compressed air.
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dsm6678
AMC Nut Joined: Jan/08/2012 Location: Mid Atlantic Status: Offline Points: 478 |
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I put a magnet to it and it seems to be some type of steel mesh screen.
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dsm6678
AMC Nut Joined: Jan/08/2012 Location: Mid Atlantic Status: Offline Points: 478 |
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Found this old post here I started in 2012. It feels like it was not that long ago. Anyway you were right about the sensors having a "internal bimetalic opening element " It was safe to clean them out with gum cutter.
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