May Have Lost Engine - Page 2 - MVAgusta.net
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post #11 of 29 (permalink) Old 07-27-2019, 07:59 AM
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Definitely sounds like the fuel hose on the pump came off to me.... It's always something simple, just not always simple to find.
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post #12 of 29 (permalink) Old 07-27-2019, 08:23 AM
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Would that not cause turbulence in the fuel tank on priming which op says there is none?
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post #13 of 29 (permalink) Old 07-27-2019, 10:09 AM
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Originally Posted by Nito View Post
Would that not cause turbulence in the fuel tank on priming which op says there is none?
I didn't see any in mine..... I think it has to do with fuel level, too.
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post #14 of 29 (permalink) Old 07-27-2019, 11:44 AM
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It doesnít always manifest as turbulence.
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post #15 of 29 (permalink) Old 07-27-2019, 03:48 PM
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Guys why would pump disconnected make engine spin fast? Does engine spin fast , then slow quickly from greater resistance?

I have seen timing chains jump a tooth and the engine acted in this manor. Dodge inline 4 2.5 liter. The Mishubishi inline 4 2.6 liter engines had GREAT cam chain adjusters. They took the slack out of the timing chain right up until at 60k the can chains would snap. In fact, true story. I ran a dodge/Mishubishi dealership when young and a mechanic was pulling a Mishubishi Mini Van into the shop for brakes and He says... hey.... this Minivan is going to hit exactly 60,000 miles as I pull it into the shop. The engine will let loose before the poor guy wears out the new tires we are installing. Sure enough as he pulls the Mishubishi 2.6 liter 4 cylinder mini van into his bay it hits exactly 60,000 miles on the nose. he leaves the mini van idling as he shows he another mechanic ….. he says, look 60,000 miles on the nose. Just as he says this while showing the other mechanic the odometer …. CRUNCH BANG Squeel STOP … the cam chain snapped and the pistons hit the valves …. engine DONE. Being the engine blew up and according to customer .. ALL Japanese cars /engines last at least 100,000 to 200,000 (Consumer reports) the mechanic had abused and ruined the engine . Mishubishi/Dodge paid for new engine even though warranty was 3year 36,000 bumper to bumper. Although I agree engine should last more than 60,000 miles the customers reasoning was Bullshit . ALL manufacturers can and do make a lemon from time to time .

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post #16 of 29 (permalink) Old 07-27-2019, 09:34 PM
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Sounds like Porsche 944 and 928 cam timing belts. A ticking bomb once these are past 30K

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post #17 of 29 (permalink) Old 07-28-2019, 12:10 AM Thread Starter
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Update! I drained a lot of the gas from the tank and when the fuel pump runs I can see some movement in the remaining fuel, along with some bubbles coming from under the filter. Pretty sure one of the hoses has deteriorated or come loose. I checked my maintenance log and I changed the hoses 6 years ago, so they're overdue for changing. Unfortunately, my garage is full of other projects at the time and since I have other bikes to ride, the MV will have to wait a while, couple of weeks most likely.


On the issue of the engine spinning fast while cranking: I think it was a lack of reference point since my bike always starts right away and I've never heard it cranking for longer than a second or two. Sounded fast but most likely all it fine inside (hopefully!). Won't know anything for sure until I pull the pump assembly.


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post #18 of 29 (permalink) Old 07-28-2019, 12:15 AM
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Yes, it seems like you need all new hoses and the filter. Be sure to clean the screen below the pump. Also, check for bits in the tank itself. But you know all this already...

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post #19 of 29 (permalink) Old 07-28-2019, 02:29 AM
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Thats good news then! Glad it was not a destruction.

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post #20 of 29 (permalink) Old 08-24-2019, 10:23 PM Thread Starter
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Latest Update! I finally got time and space to pull the fuel tank and remove the pump. All the hoses are in as-new condition, even though they're 6 years old. I pressure tested the hoses and they're all good. So, definitely not a fuel hose issue as we had all hoped!


I removed the bodywork and pulled a spark plug to test for spark. Guess what? No spark. I've checked all the fuses and relays: all good. I tested the side stand switch and it is working normally. Can't find any sign of loose connections, bad grounds, etc. The bike has never been ridden in the rain and lives in a garage year round. Everything electrical works fine, just no spark. Seems odd that I'd lose the coils so suddenly and at the same time.


Any advice from you electrical gurus will be very much appreciated.


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