If you go that route, ask them about a group buy. Anyone into self diagnostics should have at least that. Seems like a fair price.
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The boat in question has a Mercury engine, and its ECM directly drives the HPFP. While I agree that I've seen more relays than ECM's driving pumps, Mercury isn't exactly a small unknown vendor.Originally posted by UNSTUCK View Post
I get the distinct impression from your responses that I've offended you in some way with the information I shared. Not sure how or why, but I apologize for whatever I said that offended you. I was just offering assistance in case it helps someone either now or in the future. It's pretty common here on TigeOwners to share fixes and data and helpful tips, I hope that's still acceptable.Comment
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X2 on the group buy. Side note, last year when my boat wouldn't start it ended up being the crank sensor. Turns out you need a scan tool to re-train the ECM to the new crank sensor. Weeks waisted because I simply didn't have the right tool. You have found the same diagnostic sheets I was using. It was helpful but without that tool there is only so much you can do.Sometimes you have to do what feels good, rather than what feels right.Comment
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I never heard of having to reprogram for a crank sensor but yeah I'm starting to feel like I'm going in circles. May end up taking the boat to the dealer and see if they can diagnose the problemOriginally posted by alwayssummer View Post
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Just realized we are not using the same manual. You are MEFI4 and mine is 5. Any way step 5 in replacing crank sensor.image.jpg. I ended up taking it in. Shoulda spent that money on the scan tool
Sometimes you have to do what feels good, rather than what feels right.Comment
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Do you mean dustinsnipes boat as the boat in question or your buddies? dustinsnipes boat has an ECM that directly drives a relay that drives the fuel pump.Originally posted by IDBoating View Post
Sorry to have given you the impression that you offended me. You haven't in the slightest. I'm just trying to help prevent a misdiagnosis and clear up some information that may be misleading or confusing to anyone who runs into this problem in the future.
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I called the dealer and talked to their master tech he has no idea what has both the fuel and ignition system shut down. Said there is zero chance the crank/cam sensor could be causing it. Said they would put the scan tool on it and diagnose the problem for $75
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Be sure to follow up with what you find out. If the dealer says zero chance, then he should be willing to give me a million to one odds (easier to figure out than infinity to one)... I'll bet 10 bucks!Originally posted by dustinsnipes View PostComment
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I was speaking of my friend's boat, which has a Mercury engine whose ECM directly drives the HPFP and whose service manual has specific instructions for measuring how well that's working, as I described above. And, ironically, I fixed it by converting it into a relay-driven system!Originally posted by UNSTUCK View Post
My point was that both relay and non-relay powered systems are out there, and while we're having a discussion about problems powering fuel pumps it might be useful to mention both.Comment
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Been following this closely and just thinking out loud. Same boat/Motor/Year what are the chances that this could be caused by the ignition itself? When I turn my key to ACC. prior to start I listen for the LPFP to kick on before I fire it up. IF the ignition is bad, IE not sending power to the ECM to close the relay the pump wouldn't run. Also may explain why your getting poor or no spark anymore as well if the ignition is deteriorating. I may be way off base here but just a suggestion, ignitions are $30 vs. 1K+ for new ECM.My life's journey is not ending up looking pretty, its sliding in broadside, used up, worn out, screaming "What a Ride"Comment
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Some GM engine are similar. You have to put it in learn mode and do some WOT's and hit the rev limiter for a few seconds.Originally posted by dustinsnipes View PostMikes Liquid Audio: Knowledge Experience Customer Service you can trust-KICKER WetSounds ACME props FlyHigh Custom Ballast Clarion LiquidLumens LEDs Roswell Wave Deflector And MoreComment
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A few pages back he said he has power to the 86 terminal in the relay. This power comes from the ignition switch. So we know at least that part is good. And when he jumped the ground wire of the relay the engine ran. So at that time the rest of the ecm had ignition power to it.Originally posted by Thegerman618 View Post
This seems more and more like a grounding issue. Maybe all your connections are tight, but you could have corrosion inside the wire jacket that you can't see. I'd take apart every ground terminal in the engine Bay Area and ohm them back to the battery or to its connector at the ecm.Comment
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[QUOTE=UNSTUCK;758809]A few pages back he said he has power to the 86 terminal in the relay. This power comes from the ignition switch. So we know at least that part is good. And when he jumped the ground wire of the relay the engine ran. QUOTE]
Sorry I must have missed that post, was just my 2 cents for what I was reading. I am not super smart on this stuff, just trying to help in case it wasn't thought of.My life's journey is not ending up looking pretty, its sliding in broadside, used up, worn out, screaming "What a Ride"Comment
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UPDATE... So the dealer has confirmed my fear from the very first post that I do have a bad ECM. Part number R116021 they $1261 for a new one.
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That sucks. When they say "bad ECM", precisely what do they think is "bad" about it? I'm asking because strictly speaking my friend's boat had a bad ECM (according to the tests in the service manual) but we were able to keep it running by actually understanding the problem.
Just trying to save you time and money.Comment
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