EBS problem on my F4 1000 - MVAgusta.net
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post #1 of 26 (permalink) Old 06-01-2007, 07:17 PM Thread Starter
 
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EBS problem on my F4 1000

Hi everyone, I just wanted to share with you a problem I have been experiencing on my F4 1000. A few months ago I had a power commander installed on the bike and the bike was running very well up until a few weeks ago. Intermittently when riding the bike it would change suddenly from running normally to running with 15% less power, terrible sound and felt like it was running on 3 cylinders. This would last for anything up to ten minutes then suddenly surge forward and be running well again. Very frustrating! My bike is almost 2 years old and has done 16,000 km.

I took it to a bike shop in Sydney and asked for the Power Commander to be re-mapped thinking that may have been the problem. They did find one of the pins on the chip was bent and did not engage in the on board computer but that didn't appear to affect it much.

The problem was later found to be the EBS relay. The importer confirmed that this problem has been on other MV's. With my limited knowledge I will try to explain. The EBS (electronic braking system) relay comes in on a trailing throttle or decelerating. It apparently drops 2 or 3 injectors as you slow down, using engine braking to assist the rider. Then when the throttle comes on the injectors are re-engaged. The problem with mine was that the relay was engaging all but one cylinder coming on the throttle and dropped one cylinder completely. I think it was the number 3 cylinder. My relay switch was replaced under warranty.

Apologies if I have got the explanation wrong but I just wanted to share it with you if anyone else suffers a similar problem.

MarkM
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post #2 of 26 (permalink) Old 06-02-2007, 01:18 AM
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Quote:
Originally Posted by MarkM
Hi everyone, I just wanted to share with you a problem I have been experiencing on my F4 1000. A few months ago I had a power commander installed on the bike and the bike was running very well up until a few weeks ago. Intermittently when riding the bike it would change suddenly from running normally to running with 15% less power, terrible sound and felt like it was running on 3 cylinders. This would last for anything up to ten minutes then suddenly surge forward and be running well again. Very frustrating! My bike is almost 2 years old and has done 16,000 km.

I took it to a bike shop in Sydney and asked for the Power Commander to be re-mapped thinking that may have been the problem. They did find one of the pins on the chip was bent and did not engage in the on board computer but that didn't appear to affect it much.

The problem was later found to be the EBS relay. The importer confirmed that this problem has been on other MV's. With my limited knowledge I will try to explain. The EBS (electronic braking system) relay comes in on a trailing throttle or decelerating. It apparently drops 2 or 3 injectors as you slow down, using engine braking to assist the rider. Then when the throttle comes on the injectors are re-engaged. The problem with mine was that the relay was engaging all but one cylinder coming on the throttle and dropped one cylinder completely. I think it was the number 3 cylinder. My relay switch was replaced under warranty.

Apologies if I have got the explanation wrong but I just wanted to share it with you if anyone else suffers a similar problem.

MarkM
Your pretty much spot on Mark, the EBS works on cyl 2 with the ecu earthing the inj signal to fire the injector, it also opens the air bleed valve for this cylinder, the problem is that the injectors are wired in pairs, 1&4, 2&3, so the ecu also tries to fire number 3 injector, for that there is the little relay box that was replaced under warranty on your bike, this relay also takes the 12v off cylinder 3 to stop it injecting whilst the ebs works, guess it failed on your bike eh?

(This reply has not been checked for punctuation, grammar, or spelling mistakes and is devoid of any big long cleverwords or condescending manner)


MV's all gone now, still have a soft spot for MV's, waiting for MV to tick all my boxes again.
Previously (and about 40 others)748SP, S4, S4R, 98R1, 2000 F4, F41000S, F41000R, 08R1, 09R1, S1000RR, RSV4 Factory aPRC in Garage now
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post #3 of 26 (permalink) Old 06-02-2007, 03:19 AM Thread Starter
 
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Quote:
Originally Posted by mikef4uk
Your pretty much spot on Mark, the EBS works on cyl 2 with the ecu earthing the inj signal to fire the injector, it also opens the air bleed valve for this cylinder, the problem is that the injectors are wired in pairs, 1&4, 2&3, so the ecu also tries to fire number 3 injector, for that there is the little relay box that was replaced under warranty on your bike, this relay also takes the 12v off cylinder 3 to stop it injecting whilst the ebs works, guess it failed on your bike eh?

Thanks mikef4uk, glad i made a bit of sense and thanks for your additional clarification
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post #4 of 26 (permalink) Old 06-05-2007, 05:15 AM
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MarkM, glad that your bike is all fixed up. Thanks for the write up, looks like I will buy the relay to keep as a spare as my bike is the same vintage and don't have warranty.

Need to meet up with you soon up the Old road I say.....

Slow is smooth and smooth is fast!!
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post #5 of 26 (permalink) Old 06-05-2007, 07:30 PM
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Not the first one we've heard about. Glad they isolated it a bit faster than the first one we heard about

JamesC

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post #6 of 26 (permalink) Old 06-05-2007, 09:30 PM Thread Starter
 
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Hi minime,

I saw you riding with another bike last saturday going past the Road Warriors Cafe. Thought you might have been on the way up to Wollombi but I didn't see you up there. Yes, we will have to catch up for a ride soon.
MarkM
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post #7 of 26 (permalink) Old 06-05-2007, 10:34 PM
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MarkM, I was just doing a few laps of the Old road on Saturday, we didn't do Wollombi. I rather do laps of the Old road 70-80km of twisties per lap is plenty of fun.

Slow is smooth and smooth is fast!!
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post #8 of 26 (permalink) Old 03-05-2008, 04:50 PM
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i think i have the same problem

A un alma se le mide por la amplitud de sus deseos, del mismo modo que se juzga de antemano una catedral por la altura de sus torres.
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post #9 of 26 (permalink) Old 03-06-2008, 02:58 AM
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I had the exact same problem... when I removed the PCIII, problem gone ! ? how come ?
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post #10 of 26 (permalink) Old 04-07-2008, 04:45 PM
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can someone post a picture of the EBS relay or tell me where it is?
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