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New V7 Racer with FI problem

B

Brian UK

GT Reference
Joined
Nov 6, 2008
Messages
2,095
Location
Addlestone, Surrey, UK
A guy in the UK has just bought a new V7 Racer from a very reputable dealer.

He is having a problem that the bike revs up when started then stalls, no input from the owner. You can see and hear it on this Utube clip.
http://www.youtube.com/watch?v=atwqPojoBz8&feature=youtu.be
Bike has been back to dealer, they even got Guzzi Tech person in to look, but fault still comes back. Understandably he is just a bit peed off.

Anyone here recognize these symptoms?
 
That behavior would tick me off also. My guess is faulty TPS/ECU. The Guzzi rep should take care of it.
 
I've been following the original post on the UK site. He's had it at the local dealer, and the dealer has a good reputation.

Looks like a number of issues. The dealer could swap out the ECU, just to rule that out.
 
That looks similar to what my V7 Stone does, but a bit more severe and mine USUALLY won't stall unless I try to give it any throttle before a minute or two has passed by.


That said, swapping the "ECU" on that bike means swapping the entire throttle body.
 
Kev,

I've swapped ECUs on the "old" 2 TB engines many times. No heavy lifting there. An easy task.

I understand the new engine has components associated w the twin O2 sensors, but that doesn't preclude switching out the main ECU, or even the electronics for each sensor too.

Joe
 
sign216 said:
Kev,

I've swapped ECUs on the "old" 2 TB engines many times. No heavy lifting there. An easy task.

I understand the new engine has components associated w the twin O2 sensors, but that doesn't preclude switching out the main ECU, or even the electronics for each sensor too.

Joe
Click to expand...


I'm just saying the ECU IS INTEGRATED WITH (one piece with) the Throttle Body on the new bikes. They aren't sold separately nor is one replaceable without the other (well, I mean, anything CAN be done, but it's not designed to be done if you follow me).

I believe you can't replace the throttle position sensor either for the same reason.

All one sealed unit.

http://www.harpermoto.com/parts-by-moto ... 42-43.html


engine-throttle-body.jpg
 
G'day Kev M I believe that what you show is the throttle by wire unit and manifolds. The injectors will still be controlled by the ECU mounted elsewhere.

Cheers
Brian
 
organfixsing said:
G'day Kev M I believe that what you show is the throttle by wire unit and manifolds. The injectors will still be controlled by the ECU mounted elsewhere.
Click to expand...
Kev M is correct. There is no other/separate ECU. The T/B-TPS-ECU are all in one.
I've been very successful with reflashing them for wonderful power and throttle response, from bone stock to modded.
 
GT-Rx® said:
organfixsing said:
G'day Kev M I believe that what you show is the throttle by wire unit and manifolds. The injectors will still be controlled by the ECU mounted elsewhere.
Click to expand...
Kev M is correct. There is no other/separate ECU. The T/B-TPS-ECU are all in one.
I've been very successful with reflashing them for wonderful power and throttle response, from bone stock to modded.
Click to expand...

I don't think a re-flash would help this machine. Sounds more like defective hardware. Remember I've sent you 2 ECUs that read good on your bench, but the bike ran like crap with them installed. Replacement ECUs cured the problem. However, I'm sure good mapping would benefit correctly working units.
 
John, yes, I wasn't suggesting my reflash would fix this bike... Simply stating I've had great success with running bikes.
 
GT-Rx® said:
John, yes, I wasn't suggesting my reflash would fix this bike... Simply stating I've had great success with running bikes.
Click to expand...

I thought that was what you meant. I didn't want the guy with the problem to think a re-flash would cure his issue.
 
GT-Rx® said:
John, yes, I wasn't suggesting my reflash would fix this bike... Simply stating I've had great success with running bikes.
Click to expand...
Do you have dyno charts that quantify the performance improvements on single TB models?

Paul
 
My V7 started up when I turned the ignition once before,turned out the throttle cable had moved.I just 'jiggled' the cable and it cured it.Scared the sh*t out of me though.
 
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