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1987 - 1996 F150 & Larger F-Series Trucks 1987 - 1996 Ford F-150, F-250, F-350 and larger pickups - including the 1997 heavy-duty F250/F350+ trucks

map sensor

Old Apr 28, 2018 | 02:17 PM
  #16  
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All the cars (and old Broncos) that I've worked on with either the MAP or BAP sensor (same thing, but different) were mounted vertically in that area. Guessing the vertical mounting would make a big difference in itself, but that cowl area in general probably gets tons of water thrown at it.
With the BAP sensor on the MAF engines it pretty much has to be pointed downward since there is no vacuum hose attached to the nipple, so water would just walk right in whenever it felt like it otherwise.
Relocation seems a prudent course of action, as they used to say...

Paul
 
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Old Apr 28, 2018 | 09:47 PM
  #17  
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Sadly, I had the same problem-
the aftermarket ones just don't last.
The local junkyard charged me for a
couple of 'relays', and 2 years later,
I still have a spare.

t
 
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Old Apr 30, 2018 | 07:53 AM
  #18  
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Originally Posted by presbow
1988 f150 with 5.0 what would cause my map sensor to fail every few thousand miles, have 5 volts and good ground. truck goes into limp home mode put new map in and runs fine for awhile
Define "a while" ?
Have you run the KOEO & KOER ?
 
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