Originally Posted by Lauderdaleboats
(Post 3122591)
The IAC is the most common failure but there may be an issue with crank sensor. On occasion the crank sensor plug in connector will get corroded from even slight circ pump leaks. The sensor is located at the 7 o clock position jsut behind the balancer. Corroded pins will not show up on the scan tool as it is triggering a signal, just not a strong one. They are pretty easy to change out. I would take them both out, check the connectors, clean them then swap them port for stbd. See if the problems moves to the other motor or goes away completely. i have on occasion bought brand new IAC's from merc that were faulty and expensive. NAPA has the IAC's and the crank sensors. They come off of a 2003 Lincoln Mark IV. The IAC cost is $28.00 and the crank sensor is $19.00
Thanks |
Ok today
Took one baffles out of each port exhaust tips so the match starboard Changed crank sensor switched from port to starboard water pressure switch coil map sensor TPS changed fuel filters inspected cap and rotor little corrosion but not bad, cleaned Still same problem I ran it WOT and let the alarm scream to see if it would get hot or loose oil pressure.It didn't Starboard motor will wind but port only goes to 3500 3600 and the alarm while mostly constant does go in and out.The tach flutters a little so it appears that I am loosing ignition or power to the ignition.I have a lot of water coming out of the exhaust and the impellers are new.Will run a fuel pressure check tomorrow but doubt thats it.I am about to condem the harness and it was changed last year.Thoughts???? |
Ignition wires?? can't see why that would throw an alarm I am guessing at this point.
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Has it run good with no alarms after your new exhaust?
I you suggest leak down and compression test. Also a plug check and make sure the firing order is correct. |
Originally Posted by Pit
(Post 3123028)
Has it run good with no alarms after your new exhaust?
I you suggest leak down and compression test. Also a plug check and make sure the firing order is correct. |
try cleaning the grounds on that engine giving you trouble,,,
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:cool-smiley-026::cool-smiley-026::party-smiley-020:
Fixed winded up being a shift selector switch I had it on a mercury computer this morning and it was going into guardian.Why it did not show up when I had someone else scan it I don't know but the ECM thought the port motor was in neutral and would throw it into guardian over 3500 if you held the throttle there. Thanks to Southwicks Marina in Beach Haven NJ for all there help this weekend.The have 93 octane so if you need fuel stop by. |
Good deal Tim, glad you got it all squared away and it wasn't a big deal to fix!!
Like I said on the phone, sorry I didn't suggest that, I just didn't think of it!:angry-smiley-038: |
Originally Posted by Panther
(Post 3124359)
Good deal Tim, glad you got it all squared away and it wasn't a big deal to fix!!
Like I said on the phone, sorry I didn't suggest that, I just didn't think of it!:angry-smiley-038: |
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