tps evaluating for ii issues

[dave]

Update: I thoroughly re-cleaned the TPS connector last night and took the bike for a ride around town. 5 miles into the ride the low idle condition (700 RPM, slow return to 1,050 RPM, but no stalling) returned. So I thought really hard about what could have changed to bring on this condition, since the bike ran perfectly last Sunday, Monday evening, and Tuesday evening, and I think I have hit on something, and that is the gasoline. I refilled the tank Tuesday evening, putting 3.94 gallons in it. Wednesday evening, after driving almost 60 miles on the freeway, the low idle condition returned as soon as I exited the freeway (it may have returned earlier if it wasn’t for the freeway driving, where the problem does not occur). I most always buy my gas from name brand stations, but occasionally, like last Wednesday, I filled up at a 7-11 station, where there wasn’t even a name on the brand of gas. I always purchase the premium grade. Here in California we have what is called “summer blend” and “winter blend” gas, and the difference being the Reid Vapor Pressure. So on Saturday I am going to drain my tank and refill it with gas from a Chevron station, where I normally buy it in my neighborhood, and see what happens. Do any of you guys have any thoughts on this? I can’t think of any other variable that changed from Sunday, when the bike ran perfect, to today, with the low idle condition. Can you please post your comments? Thanks again for all your help guys!

Dave,
"AS" forget about this...it should be written ..."as" far as to PCSV....

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1* test condition:: on center stand, engine hot/normal operating temp and NORMAL RPM (1050)..if for any reason is not within specs, wait until it stabilizes within..
2* disconnect THICK/YELLOW vacuum hose end **that goes from PCSV to Th. body/intake manifold = this will create vacuum leak or as if PCSV were stuck in open position (normally closed) and register RPM change....it may very, so watch it for a while..
** careful, not to break nipple to PCSV
Unplugging the electrical connection will not be the same thing as removing the hoses (Popgun is perfectly correct)

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YELLOW SKINNY HOSES DISCONNECTION...might be more difficult to achieve , since there is less access to inner throttles ??? have a look..

Max is recommending that I disconnect the two EVAP ( skinny vacuum hoses/yellow & blue, linking each th. body, Honda calls'em MAP vacuum hoses) system hoses (hoses identified with yellow marks in previous post), and I assume that this is the same thing as the PCSV?(..generally, all seems to go to intake manifold) . This seems like a pretty simple test that I can do. If my bike is running fine (1,050 RPM, warm idle) and I pull off these hoses what should I expect = YOU SHOULD SEE RPM CHANGE...watch for a while what is happening with RPM...may go up, down...

Let us know, please... before next step as per Max/SportsterDoc/Popgun

pb