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+--- Thread: Cb1100 in the hospital, full diagnosis pending (/showthread.php?tid=4194)
RE: Cb1100 in the hospital, full diagnosis pending - pdedse - 11-08-2023
(11-08-2023, 10:52 AM)PowerDubs_imp Wrote: If you still have the old pump..I'll buy it from you. I want to rig up a small plastic fuel tank hung on a pole- (like an IV bag) so I can run the bike with the stock tank off while on the dyno testing stuff.
The reason I said what I said is simple- all the parts mentioned can be tested before replacing...not just guessing based on symptoms.
It is extremely unusual and unlikely to ever have more than one part fail....and extremely common and likely for a mechanic to tell you otherwise.
I really want to see what that looks like. I'm imagining a scene from the ol' TV series MASH, with you as Hawkey, or Pierce, or Honeycut bent over the opened up CB1100 on the operating table, with that IV mini-fuel tank with used pump and all. Quite the scene it would be.
RE: Cb1100 in the hospital, full diagnosis pending - Cormanus - 11-08-2023
Cb1100 in the hospital, full diagnosis pending - PowerDubs_imp - 11-08-2023
(11-08-2023, 11:36 AM)pdedse_imp Wrote:(11-08-2023, 10:52 AM)PowerDubs_imp Wrote: If you still have the old pump..I'll buy it from you. I want to rig up a small plastic fuel tank hung on a pole- (like an IV bag) so I can run the bike with the stock tank off while on the dyno testing stuff.
The reason I said what I said is simple- all the parts mentioned can be tested before replacing...not just guessing based on symptoms.
It is extremely unusual and unlikely to ever have more than one part fail....and extremely common and likely for a mechanic to tell you otherwise.
I really want to see what that looks like. I'm imagining a scene from the ol' TV series MASH, with you as Hawkey, or Pierce, or Honeycut bent over the opened up CB1100 on the operating table, with that IV mini-fuel tank with used pump and all. Quite the scene it would be.
I was an army medic & emt - so I can put my gear and throw my stethoscope over my shoulders.
RE: Cb1100 in the hospital, full diagnosis pending - SportsterDoc - 11-10-2023
Max posted a simplified wiring diagram
https://cb1100forum.com/forum/showthread.php?tid=14697
If the fuel pump relay and/or any other relay feeding it developed corroded contacts, causing high resistance, thereby reducing voltage to the fuel pump, the pump would draw higher amps to obtain the necessary wattage to operate. If that were the case, then the pump would get hot, which could damage the windings.
This could easily be diagnosed with a voltmeter applied to the fuel pump leads, while operating.
2007-2009 Sportsters had an issue with fuse and relay location, which was an issue for parking in the rain / riding in the rain / washing.
4800 miles on my V7-850 in 6 months. Just not averaging 1,000 miles a month here in New Mexico.
RE: Cb1100 in the hospital, full diagnosis pending - misterprofessionality - 12-12-2023
Full recovery!
The CB1100 is back in my care as of today, finally, after 6 weeks of waiting for honda OEM parts.
The final word is it WAS the stater, which is not known for going bad in the mid 60k miles, but is also not impossible. He did find a melted connecter at my headlight lamp while doing a comprehensive inspection of the electrical system (which he also replaced) but he feels confident that is most probably unrelated. If anything it may have contribued to my repeated headlight bulb outages, but likley had nothing to do with the stater issue.
At any rate, with the worn out relays and the worn out fuel pump replaced and the malfunctioning stater replaced, the bike now runs flawlessly and gets all its fueling correct and consistent.
I guess the only thing i could take away from this to add to the general knowledge base is....open your headlight bucket and check for melted connectors!
RE: Cb1100 in the hospital, full diagnosis pending - peterbaron - 12-12-2023
(12-12-2023, 01:48 AM)misterprofessionality_imp Wrote: Full recovery!
The CB1100 is back in my care as of today, finally, after 6 weeks of waiting for honda OEM parts.
The final word is it WAS the stater, which is not known for going bad in the mid 60k miles, but is also not impossible. He did find a melted connecter at my headlight lamp while doing a comprehensive inspection of the electrical system (which he also replaced) but he feels confident that is most probably unrelated. If anything it may have contribued to my repeated headlight bulb outages, but likley had nothing to do with the stater issue.
At any rate, with the worn out relays and the worn out fuel pump replaced and the malfunctioning stater replaced, the bike now runs flawlessly and gets all its fueling correct and consistent.
I guess the only thing i could take away from this to add to the general knowledge base is....open your headlight bucket and check for melted connectors!
Good diags and repair, kudos to your tech!!
RE: Cb1100 in the hospital, full diagnosis pending - misterprofessionality - 12-12-2023
very long diags and repair, but it's good to know it's all completely sound and fine now. most of the delay was down to parts shipments, which came in multiple stages and took a long time each time.