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MAP Sensor 1800 1972

posted by  Viper1800e on  Sun Aug 3 12:01 CST 2003
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Here,

This may help also. It is from Paul Anders research. The 90 and 350 ohms are a good check as is the vacuum check or suck job. You may still have warped diaphrams and other issues but not likely if it does not leak. I would allow at least 10% tolerance to the readings .


Normal Value(s):

Primary Coil (terminals 7 and 15): 90 ohms. Using a Wavetek LCR55 meter on my MPS, I measured 99.9 ohms.
Secondary Coil (terminals 8 and 10): 350 ohms. Using a Wavetek LCR55 meter on my MPS, I measured 365 ohms and 1.37 H inductance (@ 0 in. Hg) at the ECU plug (note - the measured inductance will vary by MPS, data taken on a newly-rebuilt 0 280 100 043).
Use a hand vacuum pump with a gauge, pull 20 in. Hg. of vacuum on the port and monitor the vacuum level for 5 minutes. Should not drop below 15 in. Hg, if so, the unit has a vacuum leak and should be replaced soon.

Greg Bodner
1970 1800.





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