Manifold pressure sensor not working properly
- Thread starter Dbbuckner
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NorthernFocus
Well-known member
- Joined
- Jun 29, 2014
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- 1,376
- Location
- Alaska
- Website
- www.northernfocusphotography.com
- Fluid Motion Model
- R-25 Classic
- Hull Identification Number
- FMLT25910808
- Vessel Name
- Divine Focus
If you have the service manual look up MAP sensor. It's a bugger to get to. Located on top, front of engine kind of under the dip stick. Held down by a single bolt. When replacing it is easy to think it's in properly and the bolt will tighten with the sensor slightly out of place. It is a dual sensor, IAT/MAP, that provides manifold air pressure and temperature. Costs a couple hundred dollars through Mercruiser but is a Bosch part common to various automobiles and can be had via auto parts supply for about $30. Bosch P/N 0281002845.
When I bought my boat the previous owner told me he had a problem with a MAP sensor failure and had recently had it replaced. I found that it was still wonky. When I investigated I found the previous repair had not installed it properly per above. Replaced it and have about 1200 hours on the new one with never a hickup.
When I bought my boat the previous owner told me he had a problem with a MAP sensor failure and had recently had it replaced. I found that it was still wonky. When I investigated I found the previous repair had not installed it properly per above. Replaced it and have about 1200 hours on the new one with never a hickup.
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