Another Fuel Pump Thread - MVAgusta.net
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post #1 of 33 (permalink) Old 08-16-2018, 06:36 AM Thread Starter
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Another Fuel Pump Thread

A couple of weeks ago my fuel pump died on me while riding.

Got it home and the pump screen was all chalked up. I cleaned the screen and also replaced the Mahle filter. Got everything back together and the bike sounds like it's running on three cylinders.... but it stays idling. When I blip the throttle the revs hang.

Any ideas what I screwed up?

Thanks in advance for any feedback.

2005 MV F4-1000S
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post #2 of 33 (permalink) Old 08-16-2018, 08:00 AM
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Did you clean the quick disconnect fittings?

There is a possibility of fuel injector fouling also.

Does the pump "squeal" when priming?

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post #3 of 33 (permalink) Old 08-16-2018, 08:54 AM Thread Starter
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Quote:
Originally Posted by silentservice703 View Post
Did you clean the quick disconnect fittings?

There is a possibility of fuel injector fouling also.

Does the pump "squeal" when priming?
I replaced a broken quick disconnect fitting. The "L" shaped pieces that connect to the bottom of the fuel pump. I pulled it out of the hose and cut the sheath inside of the hose to get the old one out.

I was afraid of the fuel injector fouling. Should I test it with a multimeter or something? I have 2 spare injectors but am hoping I won't have to go there.

The pump whistles/squeals like normal. It's definitely working. I'm wondering if I have air in the system or something.

The bike acts like a carb that has a manifold leak - the revs stay high after a blip

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post #4 of 33 (permalink) Old 08-16-2018, 09:24 AM
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Did you replace the fitting with an identical fitting?

You can't test an injector for fouling with a multimeter. Only flow testing can tell that.

It is possible that you have a vacuum leak. Check all vacuum related hoses.

The fuel pump should not squeak, but you should hear it prime. Air would not be trapped in the system due to the return line.
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post #5 of 33 (permalink) Old 08-17-2018, 09:15 PM Thread Starter
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It turns out that the pump is bad.

By any chance, does anyone know the flow specs for the stock fuel pump?

I have an AEM 320LPH @ 40psi pump that I was going to install in my H2 but have not had the chance. I'm thinking about putting it in the MV and the connector is actually the same. The MV and the H2 use the same size battery so I have no doubt about the battery's ability to supply the needed voltage.

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post #6 of 33 (permalink) Old 08-18-2018, 04:23 AM
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If your going to change the pump there are other pumps on the market exactly the same as the existing pump but at a third of the oem price , sorry i cant recall the exact model number but it is the same as fitted to numerouse small cars here in the uk
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post #7 of 33 (permalink) Old 08-18-2018, 07:12 AM
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Quote:
Originally Posted by Turbo329 View Post
The MV and the H2 use the same size battery so I have no doubt about the battery's ability to supply the needed voltage.

There are so many things wrong with this statement.

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post #8 of 33 (permalink) Old 08-18-2018, 07:19 AM
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I'll get back to you today with the Bosch Part Number

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post #9 of 33 (permalink) Old 08-18-2018, 08:04 AM Thread Starter
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Quote:
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I'll get back to you today with the Bosch Part Number
Thank you sir..

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post #10 of 33 (permalink) Old 08-18-2018, 08:05 AM Thread Starter
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Quote:
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If your going to change the pump there are other pumps on the market exactly the same as the existing pump but at a third of the oem price , sorry i cant recall the exact model number but it is the same as fitted to numerouse small cars here in the uk
There's one on Ebay claiming to be an OEM replacement. just under $100.

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