My graybeard mechanic recommends cleaning fuel injectors with Hoppe's gun
solvent by soaking overnight.
It works like a charm.
----- Original Message -----
Sent: Friday, February 03, 2012 1:10
PM
Subject: [LML] VM1000 MAP sensor unit
question
The EPI 800 and VM 1000 manifold pressure "sensor" consists of a brass
block that is pipe thread tapped for a fitting connected to the
MAP source on one side and the actual pressure sensor mounted on the
other side that is electrically connected to the VM computer.
Imbedded in the block is a porous metallic "restrictor" with the
purpose of "smoothing" rapid fluctuations in the pressure and
protecting the fragile actual sensor.
If this restrictor becomes clogged with miniscule particulate, it
further dampens pressure changes so that the MAP indication does not change
rapidly as pressure rises or hardly at all as the pressure drops. At
some steady state the MAP indication seems correct and the actual sensor
seems to be operating properly. I.E. The tested pressure
eventually makes it past the restrictor.
One of the ways to fix this is to clean the restrictor. Here is
where I need help. Because the restrictor mesh is so fine, what
chemicals and what procedure is best used to clean and restore the
restrictor? Should a vibrating parts/jewelry cleaner be used? It
cannot just be soaked and blown out.
Thanks,
Scott Krueger
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