tech help

[Commuta_Busa]

yup measured the resistance and it was within .00001 ohm's of the other injectors.

I'm going to source new connectors, etc and just build a new harness. This will eliminate any kind of current or future harness issues. I already bailed from the race so now I've got more time to sort all of this. Thanks for everyones help and suggestions.

I had to work late yesterday and didn't even go in my garage just right to bed. Mentally I'm just exhausted from the weekend. Tonight I'll start looking at the kaos again. Hey, I think I just found a name for my bike! Kaos

 

[Ketchmi]

Sorry for my mis-communication, I meant to disconnect the injectors then measure the resistance. It should be open.

 

[Commuta_Busa]

yup, checked that as well.

Sorry for my mis-communication, I meant to disconnect the injectors then measure the resistance. It should be open.

 

[kjcili]

I know this is a repeat, but u may have missed it Ken. Put a noid light on that harness, and make sure its pulsing. having power and ground and continuity are all good, but if the ecu is not pulsing the injector you either have a crank trigger problem or the ecu is poop.

 

[Commuta_Busa]

yup, tonight when I have more time I plan on giving that a shot.
As far as the crank shaft position sensor, the engine would not start or run if there's a problem with this sensor. The camshaft sensor is a little idfferent. It wont start without it but if while it's running you disconnect the sennsor it'll continue to run. I disconnected the cam sensor while the engine was running to determine if there was some sorta phase shift but it had no effect.

I know this is a repeat, but u may have missed it Ken. Put a noid light on that harness, and make sure its pulsing. having power and ground and continuity are all good, but if the ecu is not pulsing the injector you either have a crank trigger problem or the ecu is poop.

 

[kjcili]

yup, tonight when I have more time I plan on giving that a shot.
As far as the crank shaft position sensor, the engine would not start or run if there's a problem with this sensor. The camshaft sensor is a little idfferent. It wont start without it but if while it's running you disconnect the sennsor it'll continue to run. I disconnected the cam sensor while the engine was running to determine if there was some sorta phase shift but it had no effect.

Actually, to the contrary, granted, I'm an ASE MAster Tech that specializes in the automotive field, so this MAY indeed be a little different, but I have seen crank sensors glitch just enough to cause a miss or even skip firing seqeunces but still allow the vehicle to run. You arre correct however in that the cam sensor could also cause the same problem. If you have access to a scope, hook a scope up to your cam and crank sensors while running, send me the crop, and i'll hook mine up to our pico scope and compare patterns.

 

[Commuta_Busa]

you a very very short intermittent fault from the crank sensor may allow the engine to still run but if it were a failure the engine would stop and/or not start. The auto ecu is a bit smarter than these bike ecu's and they may be able to go into a limp mode under more varying circumstances than the bike one.
Yea I wish I had a scope lying around in my garage but unfortunatly I can't justify the out of pocket costs. Right now I think I could but only in this instance. I do have a call out to try and borrow someones. Since you've got some good experience with these, what's a decent brand and model for motorcycle diagnostics. Obviously I don't need one to read at 6Gig's, lol.

 

[Professor]

I believe you are monitoring/logging injector pulse now? How about adding a second channel so that you are logging two injectors (including 4) at the same time. You could also monitor #4 at both the ECU and the injector to look for harness problems (differential) .

I haven't been very active in the electronics fields for several years, but working surplus dual trace scopes should be getting pretty affordable.

 

[mammothmc]

dealt with a similar fault on a kawi once. Cam position sensor turned out to be the culprit. It started to intermittently kill injectors. It was hell nailing that one down.

 

[Commuta_Busa]

logging multiple injector pulse rates is something I haven't thought of doing yet. Then I don't need to hunt down a scope. I asked kjcili on his thoughts in regard to used scopes and brands. I'm only familier with Techtronixs and Fluke. I'm sure there are a ton of others out there as well. Anyone with more scope knowledge can pm me their suggestions and thoughts.

I pulled the cam sensor while the engine was running and it had no effect so I'm pretty sure that's not the culprit. I've got a spare sensor I might instal just for giggles.

 

[kjcili]

Pulling the cam sensor may cause it to just go into a default mode, so as not to disrupt it's pattern...

 

[Commuta_Busa]

yes, was seeing if this "default/limp" mode would have any affect. Unfirtunately it had none.

Pulling the cam sensor may cause it to just go into a default mode, so as not to disrupt it's pattern...