View Full Version : Map sensor? Engine boggs at 2100 rpm...

08-21-2011, 07:59 PM
I recently purchased a 96 prostar 205 SD LT1. The boat has about 250 hrs on it. Here's the problem. When i accelerate the boat boggs down at 2100 rpms. I turn off the engine and restart it and the boat runs like a "scalded dawg" as my father says, pull the throttle back to idle or below 2100 rpms and try to accelerate and it boggs down again at 2100 rpms. Turn the engine off and restart it and it runs great again. It will also bogg down after about 5-10 minutes of running 2500 rpms or higher. I need to get this fixed before i wear out the battery and starter.

Thanks to this forum, here's a list of the things I've done...
-completely drained the fuel tank
-changed both fuel filters
-checked the fuel pump inlet screen (it was clean)
-repaired sender unit (gas gauge didn't work)
-changed oil and filter

I am wondering if I need a new map sensor. Many thanks in advance for any help.