PGM blink

[fogrider]

After reviewing the cured hot yellows and maybe weak idle mixture, I finally noticed that the very brief red blink coincides with a very brief ignition cut-out. The rev ctr needle drops for the same brief time as the red blink.

It doesn't stop the engine, just that brief stumble , only while warming up.

I can't figure this out, it's annoying , especially on the road.

Any ideas anyone ?
Seemed a good idea to split this off as a new topic.....

Regards all,Terry.

[fogrider]

Well, I unplugged the 4 IMA's and started the engine. Starts OK, PGM light on for longer periods and still the odd stumble. Plugged the IMA's back together, one by one, no detectable difference to the way it ran.

Did notice it seems more sensitive just under 3000 revs when the blink seems to happens more frequent.

It's becoming rather tedious, I'm no electronics expert !
Wish I'd stuck to an RC30, I want my carbs back !

Regards all....

[fogrider]

Thanks Larry, I've just had a look and can't see that plug. Mine must be buried somewhere behind the frame rail and main loom. Will have a better look tomorrow.
The voltage problem is resolved, new battery and reg/rec and steady output at 14.3 so finding the earthing points is next.
It seems strange it's an intermittent blink and clears up when at full temperature after a few miles running.
I might try taking the tank off and checking all the sensors and pipes around the airbox .
That orange earth busbar first - once I've found it .
Regards, Terry.

[fogrider]

Thanks Larry, I've just had a look and can't see that plug. Mine must be buried somewhere behind the frame rail and main loom. Will have a better look tomorrow.
The voltage problem is resolved, new battery and reg/rec and steady output at 14.3 so finding the earthing points is next.
It seems strange it's an intermittent blink and clears up when at full temperature after a few miles running.
I might try taking the tank off and checking all the sensors and pipes around the airbox .
That orange earth busbar first - once I've found it .
Regards, Terry.

[fogrider]

I couldn't find that earth busbar anywhere. There's a bundle of 4 green earths to the frame where the reg/rec is bolted up but no bulge in the loom . Whilst the back of the tank was raised I checked what pipes etc were visible, all looks good.

I pulled the main fuse out, slightly grey, cleaned the socket with contact cleaner and put a new fuse in.


After that I got fed up , put the seat unit back on and will tax it and ride it when the weather picks up


Will let you all know if a good run will do the bike as much good as it will do me !

Regards, Terry. East Yorks.

[moto16]

[quote="fogrider"]I couldn't find that earth busbar anywhere. There's a bundle of 4 green earths to the frame where the reg/rec is bolted up but no bulge in the loom . Whilst the back of the tank was raised I checked what pipes etc were visible, all looks good.

I pulled the main fuse out, slightly grey, cleaned the socket with contact cleaner and put a new fuse in.


After that I got fed up , put the seat unit back on and will tax it and ride it when the weather picks up


Will let you all know if a good run will do the bike as much good as it will do me !

Regards, Terry. East Yorks.[/quote

Terry, as Larry has already said, it is buried within the loom and will be covered in multiple layers of black insulation tape (loom wrap). It will definitely not be instantly obvious where it is and I can't tell you because I've no experience of working on the loom of my RC45.

[fogrider]

I will try again, I have a few other priorities at the moment.

Someone local has pointed out that the PGM is fuel system only, no control over the ignition. So, why does the PGM blink also show a drop on the rev counter and a brief engine cut-out ?? How is it connected ?

Suggestion is there is an ignition system issue somewhere, it looks like start again !


Regards all

[moto16]

I will try again, I have a few other priorities at the moment.

Someone local has pointed out that the PGM is fuel system only, no control over the ignition. So, why does the PGM blink also show a drop on the rev counter and a brief engine cut-out ?? How is it connected ?

Suggestion is there is an ignition system issue somewhere, it looks like start again !


Regards all

Terry, if it is an earth fault, they can cause all sorts of strange symptoms. It only has to make a sensor give a false output for a moment and hey-presto, you have your problem.

It could also be a dodgy sensor. On my Mrs's car years ago the EWT (engine water temperature) sensor had an intermittent fault. As the car was warming-up it would go open-circuit. This meant the signal to the ECU looked like the engine temperature had dropped to some crazy low level. The car would accelerate wildly for about 2 to 3 seconds as the ECU pumped a load of fuel into the plenum. It took me ages to bottom it, finally proved by monitoring the sensor in a warming jug of water.

[Busy Little Shop]

So, why does the PGM blink also show a drop on the rev counter and a brief engine cut-out ?? How is it connected ?

Blink followed by a Drop revs could be when ECU switches over to limp home mode to assure engine operation even in case of malfunction sensor(s).

30410MW4601 UNIT COMP SPARK is as separate black box...

[fogrider]

Thanks both for the comments, looks like I need to eliminate the various sensors , reading up on fuel injection systems I saw that our PGM system has a vacuum thing , a temperature sensor and an airflow thing, the fault - a minor blink/stumble as she warms up - could be caused by that part of the system. Unknown !

It's strange the PGM bridge test for faults says all is OK.

Oh well, I'll have another go in a few weeks...

Regards all, Terry.

[fogrider]

Those 2 diagrams are excellent Larry, now I see where all the bits are in relation to the bike, I will be able to check those items over.
Interesting that on the CSML parts drawing, they list the 4 IMA pots as Ignition adjust - I assume that's wrong, she didn't change in any way when I ran her with them disconnected.
All these complications, know I know why I'm a techno-phobe !

I think she might end up for sale in the summer , back to my old brit bike with CARBS.

I'm sure I'll change my mind once I've ridden her again, addictive engine....

Thanks again, regards Terry.

[fogrider]

I did have an RC30, the way it reached 13.000 in each gear was fantastic.
I sold it some years ago.
How stupid can you get.
Maybe I should swap the 45 for another 30?

I will be riding the '45 this summer, I'm sure I won't want to part with it !

Regards all

[fogrider]

A few enjoyable posts there, some class riders too, Guy Martin lives about 30 miles from me, wonder if he wants to buy an RC45?


No-one is going to 'have a go on it ', that's for sure !


Busy finishing off a C95 Benly so the '45 will have to wait to smell tarmac,


Roll on summer