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CB1100 Idle speed instability problem
(12-16-2017, 01:56 AM)SportsterDoc_imp Wrote:
(12-15-2017, 11:36 AM)pdedse_imp Wrote:
(12-15-2017, 10:46 AM)max_imp Wrote: Thanks pdedse, i was going to ask about this fix, i would not exclude the tps connector, you are now the second to have cured your issue, that i s good news.
Also thanks for the tho links, that helped a lot jdvalero had a low voltage code, so the pin in question was actually the leftmost one, ( +5v ) i think, if it makes bad contact it will open and the voltage will go low.
He correctly states that he THINKS the one he poins at is suspect but it is not.

I like to thank him for taking the picture and posting the fix!

The way the tps connector is installed bothers me a bit, the small wires may be under stress, so it's also a suspect in my opinion and if anyone has a look at theirs be advised to not force the connector in the tps, it should connect fairly easy, if not the contacts could end up mis-aligned and to provide some room in the wiring the tank needs to be lifted and the plastic cover removed with a philips screwdriver.

i also like to stress that trying to adjust the tps by rotating it is not recommended at all unless a very good understanding is achieved on how to proceed, pogun advised this and i would like to repeat his wise words.

Thanks all for the input max

Haha, I am not so optimistic as to call it a cured issue. At least one member has reported that issues disappear over winter only to return in the summer. But every ride free from the high/low idle bug is greatly appreciated, as all are your guys' efforts at pinpointing the matter.

I wish I lived closer to one of you three/four electronic minded members, as I would happily ride by and donate my bike for a weekend to let folks do testing mentioned of late here. I may be able to probe for vacuum leaks as Doc stresses, but I also know my limitations in the realm of electronic diagnosis.

It needs to be misbehaving, unless there is a stored code.
Have you snugged your intake clamps?

It needs to be misbehaving, unless there is a stored code.
I think this is why the CS manager at the Honda dealership was reluctant to make any promises had I left the bike with them. The week prior to taking it in, the idle was up and down, the day I went in...rock solid.

(12-16-2017, 01:56 AM)SportsterDoc_imp Wrote:
(12-15-2017, 11:36 AM)pdedse_imp Wrote:
(12-15-2017, 10:46 AM)max_imp Wrote: Thanks pdedse, i was going to ask about this fix, i would not exclude the tps connector, you are now the second to have cured your issue, that i s good news.
Also thanks for the tho links, that helped a lot jdvalero had a low voltage code, so the pin in question was actually the leftmost one, ( +5v ) i think, if it makes bad contact it will open and the voltage will go low.
He correctly states that he THINKS the one he poins at is suspect but it is not.

I like to thank him for taking the picture and posting the fix!

The way the tps connector is installed bothers me a bit, the small wires may be under stress, so it's also a suspect in my opinion and if anyone has a look at theirs be advised to not force the connector in the tps, it should connect fairly easy, if not the contacts could end up mis-aligned and to provide some room in the wiring the tank needs to be lifted and the plastic cover removed with a philips screwdriver.

i also like to stress that trying to adjust the tps by rotating it is not recommended at all unless a very good understanding is achieved on how to proceed, pogun advised this and i would like to repeat his wise words.

Thanks all for the input max

Haha, I am not so optimistic as to call it a cured issue. At least one member has reported that issues disappear over winter only to return in the summer. But every ride free from the high/low idle bug is greatly appreciated, as all are your guys' efforts at pinpointing the matter.

I wish I lived closer to one of you three/four electronic minded members, as I would happily ride by and donate my bike for a weekend to let folks do testing mentioned of late here. I may be able to probe for vacuum leaks as Doc stresses, but I also know my limitations in the realm of electronic diagnosis.

It needs to be misbehaving, unless there is a stored code.
Have you snugged your intake clamps?

Not yet; since cleaning the TPS connector the bike has run well (about 2 weeks, 5 rides of 1/2 hour to 2 hours, shorter 10-15 minute rides). I kinda want to let it go for awhile to see if either high or low idle returns. If neither does, maybe we're beginning to isolate the affected area at the TPC connector? If the issue returns, then on to the intake clamps.
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Messages In This Thread
RE: CB1100 Idle speed instability problem - by pdedse - 12-16-2017, 02:26 AM

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