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Thread: Stumped - 2011 Multistrada high idle, backfiring, misfiring Reply to Thread
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  Topic Review (Newest First)
May 28th, 2019 12:15 am
coast range rider Is problem diagnosed and fixed yet?
May 12th, 2019 2:01 pm
messes Mine never threw a code either and I have had two occasions of similar behaviour. The local dealer tells me it should throw a code but it never has.

The first time it was an air leak from the injector seal and I too tried the remove a MAP sensor trick to try to diagnose. The second time it was the horizontal MAP sensor but I presumed it was the injector seal coming back and just took it to a dealer who were able to read the MAP values as being out of spec.
May 7th, 2019 10:49 am
ducvet Just going to assume you have checked your drain plug magnet for abnormal metal, I have a 2012 apart on the bench from a failed main bearing. A crank jumping around in the cases will do all sorts of bad things.
May 7th, 2019 10:18 am
herveyw
Quote:
Originally Posted by tsmerian View Post
Thanks very much. I also need this, correct? https://www.amazon.com/gp/product/B0...59S1N1FB&psc=1
No. The Lonelec kit has the adapter from 4-pin to ODBII, plus an ODBII to USB adapter using the ELM v1.4 interface that MelcoDiag can use.
May 7th, 2019 9:06 am
tsmerian
Quote:
Originally Posted by herveyw View Post
This 4-pin connector from Lonelec, arrived in a week (check you have 4-pin and not 3-pin): MELCODIAG DIAGNOSTIC KIT - INTERFACE + ADAPTOR (ELM & 4 Pin Set).

I also registered MelcoDiag, free license received in ~24hrs.
Thanks very much. I also need this, correct? https://www.amazon.com/gp/product/B0...59S1N1FB&psc=1
May 6th, 2019 9:01 pm
herveyw
Quote:
Originally Posted by tsmerian View Post
I am diagnosing similar issues with my 2012 MTS 1200. Can you kindly share what cables you purchased that worked with MelcoDiag?
This 4-pin connector from Lonelec, arrived in a week (check you have 4-pin and not 3-pin): MELCODIAG DIAGNOSTIC KIT - INTERFACE + ADAPTOR (ELM & 4 Pin Set).

I also registered MelcoDiag, free license received in ~24hrs.
May 6th, 2019 12:21 pm
tsmerian
Quote:
Originally Posted by herveyw View Post
I have now bought cables so that I can run MelcoDiag and pull error codes from the bike; it was a rather expensive trip to the dealer for diagnostics -- although cheaper than my car -- but at least it identified the problem on my bike.
I am diagnosing similar issues with my 2012 MTS 1200. Can you kindly share what cables you purchased that worked with MelcoDiag?

Thanks in advance!
Apr 28th, 2019 2:02 pm
herveyw
Quote:
Originally Posted by tmendola View Post
I unplugged the hort. cylinder MAP sensor and ran the bike.

You would think it won the lottery with how rich it was running. It was also backfiring and stalling out. The bike didn't want to rev up and when it did, it had a fit.
Pretty much my experience when my sensor was intermittently acting up, although the stalling was something I only experienced when riding.

Quote:
Originally Posted by tmendola View Post
But it never threw a code.

I'll say that again: never threw a code.

I ran that engine for at least a minute and didn't get any information from the ECU on the dash nor a CEL. Per the manual, it's supposed to throw a code when it senses an open-circuit going to either (or both) MAP sensors.

I plugged the sensor back in and the bike returned to how it has been running for the past few weeks? months? I don't remember when this even started anymore.

This leaves me with a few questions:
Why on earth did it not throw a code?
How often does the ECU check for an opened circuit (maybe I didn't let it struggle long enough)?
Why did it not switch over and use the other MAP sensor for the vert. cylinder like the manual says it should?
Does the fact that it ran worse mean it isn't the MAP sensor at all and I'm just chasing a wild goose?

If I don't get any clear answers on this, I'm just going to move on and check the hoses to the MAP sensors, like mwhite5471 suggested. If it isn't that, I'll move on to the injectors like wal916 and Steve W. suggested.
I don't have the answer to the code problem, or your questions about ECU behavior. Mine obviously did throw the code at some point because I had the CEL and the code was logged in the history. But, at the dealer, there were no active codes even though it was a touch sketchy on the way there. I also had several runs with no error indication and no running problems, other runs with no CEL but some running problems, others with CEL and scary situations at traffic lights.

I didn't chase the goose, I just replaced the sensor on the advice of the dealer tech even though he said he couldn't guarantee that was the problem and it has be fine since. $115 to avoid the goose chase. Obviously, I too provide no guarantees, only anecdotes, YMMV
Apr 28th, 2019 12:03 pm
tmendola
Quote:
Originally Posted by coast range rider View Post
Quote:
Originally Posted by tmendola View Post
This is great info! I'll have to check for this while I'm looking at the injectors.
It can be seen with a flashlight. No other tools needed to see this problem. (no disassembly)
Oh! Even better!
Apr 28th, 2019 11:23 am
coast range rider
Quote:
Originally Posted by tmendola View Post
This is great info! I'll have to check for this while I'm looking at the injectors.
It can be seen with a flashlight. No other tools needed to see this problem. (no disassembly)
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