Has anyone had a problem with their VisionMicro 1000 MAP sensor? Mine is reading very very slow. It's solid and I checked all the wiring. I connected a vacuum pump to it today and when I run the pressure down the VM 1000 will start to read lower and lower but it takes about 10 seconds for it to change a very small amount. EX: from 27 to 10 might take 4 ~ 5 minutes, and back again the same.

It seems like the MAP sensor is reading right but takes forever to change... Anyone see this, or fixed the same problem?

Rany,

 

There is a constrictor/metal filter used to suppress pressure spikes.  It is located in the brass block where you screwed in the flare/tube adapter connecting to the engine manifold pressure.  It can get so fouled that the pressure change is delayed quite a bit.  It is cleanable, but it is a PITA to do so.  You will have to use your wits to disassemble, clean and reassemble.

 

Good Luck,