Nondestructive MAF screen removal
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Joined: Mar 2002
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From: East Central Florida
Nondestructive MAF screen removal The MAF screen is bedded in with a small
amount of what looks to be gray epoxy. I
sat the MAF fore end piece in a dish of
paint remover (the liquid kind, not the
jelly) for about half an hour, and then ran
a utility knife around the edge, keeping
tight to the MAF body wall, trying to make
a slit between the screen and the body.
This worked easily, and the screen fell out
without any damage. The outermost ring of
honeycomb cells are maybe compressed, barely.
A finer (like X-acto) blade could've done even
better. The screen is still flat and still a
snug fit to the body.
Not sure if the paint remover was even
necessary. It was pretty old & weak. But the
epoxy just gave up on sticking to the aluminum;
it's all still on the screen, came off clean.
I tried to do this because I'm interested to
see whether ported with the screen in place
ups airflow without distorting the airflow
metering.
Not that I'm optimistic; increasing the
airflow area without changing the sensor
seems unlikely to be "high fidelity". But
it's something to try.
Along those lines... I wonder if anyone's
tried fooling the MAF by selectively removing
a honeycomb cell or two right in front of
the sense resistors? That would up their
indicated airflow relative to the rest of
the surface, might reduce the lean error.
amount of what looks to be gray epoxy. I
sat the MAF fore end piece in a dish of
paint remover (the liquid kind, not the
jelly) for about half an hour, and then ran
a utility knife around the edge, keeping
tight to the MAF body wall, trying to make
a slit between the screen and the body.
This worked easily, and the screen fell out
without any damage. The outermost ring of
honeycomb cells are maybe compressed, barely.
A finer (like X-acto) blade could've done even
better. The screen is still flat and still a
snug fit to the body.
Not sure if the paint remover was even
necessary. It was pretty old & weak. But the
epoxy just gave up on sticking to the aluminum;
it's all still on the screen, came off clean.
I tried to do this because I'm interested to
see whether ported with the screen in place
ups airflow without distorting the airflow
metering.
Not that I'm optimistic; increasing the
airflow area without changing the sensor
seems unlikely to be "high fidelity". But
it's something to try.
Along those lines... I wonder if anyone's
tried fooling the MAF by selectively removing
a honeycomb cell or two right in front of
the sense resistors? That would up their
indicated airflow relative to the rest of
the surface, might reduce the lean error.
