So, saturday, the map sensor in my MS crapped out, it's now always reading a constant pressure, between 100 and 150 kpa. I was wondering why my car was soo lumpy and I had major backfires, I hope I didn't wash the cylinder walls with gas... anyone heard about that happening before?
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never heard of that
did you try replacing the vacuum line?Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
... The first FWD BG with a Toyota E153 transmission conversion in the USA!
Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts
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I checked the specs for the MPX and it only uses 3 pins, power, gnd and signal. it has power and gnd as it should, the signal is an output obviously. I'll order another one install it remotely in the engine bay with 3 wires running from the sensor to the MS. I think it broke because of me pulling the vacuum line all the time at -15 (rubber is really hard at that temp).
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Originally posted by Lex View PostThat doesn't sound right. I wonder if there is a soldering problem? Have you opened it up?
JoN - Automotive Machinist Journeyman/Refrigeration Mechanic Journeyman
Member of MX-3.com
1996 Mazda MX-3 RS - Creek Blue Mica
1993 Mazda MX-3 GS SE - Raspberry... RIP
Racing BP (Project "Blue" Marlin)... Twin Scroll GT3071R, breaking 30psi at the moment!
"Do it ONCE, do it RIGHT!"
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suggestion....
i took a short piece of vac hose and "permanently" attached it to the map sensor with a zip tie. then i used a plastic vac line coupler to connect to the rest of the hose. that way i can take the MS out without having to put any stress on the sensor.Escort GTR -- 11.87 @ 117.6 mph -- 320 HP / 325 Ft. Lbs. @ 23 PSI
... The first FWD BG with a Toyota E153 transmission conversion in the USA!
Looking for BP x Toyota E153 adapter plates? PM me or contact me on Facebook: Riel Performance Parts
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Originally posted by 323driver View PostI checked the specs for the MPX and it only uses 3 pins, power, gnd and signal. it has power and gnd as it should, the signal is an output obviously. I'll order another one install it remotely in the engine bay with 3 wires running from the sensor to the MS. I think it broke because of me pulling the vacuum line all the time at -15 (rubber is really hard at that temp).
1. The temperature characteristics are not friendly. Yes it is rated from -40 to 125 deg C, but you don't want to be close to those values because error becomes worse over 85 deg C.
2. There is no good way to mount it or protect it - it is meant to go on a PCB.
3. It may introduce some unwanted noise in the signal - the engine bay is not an electrically friendly place.
If you prefer an engine bay automotive grade sensor, getting an RX-7 or similar 3 bar map sensor from the yard might be a better option.
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