Re: John Dancoe's new(ish) e-mail address

[Bob Hadden <kbhadden@xxxxxxxxxxx>]

John,  I enjoyed your spam, but didn't have the nerve to reply on list!

Several items to look at here:
- -I wonder if your O2 sensor is at issue here.
- -Throttle body worn bushings and loose bushings
- -Compression check to confirm mechanical issues.
- -Perhaps the hall sensor is going bad and giving bad timing?  YOu can 
put a timing light on to see if it looks right.
- -Fuel pressure

My guess is you will find pretty quickly where things are not right.  
Can you get a dealer to check the computer for faults?

Bob Hadden '98RS

On Apr 8, 2004, at 10:14 AM, John Dancoe wrote:

> Sorry for what was arguably spam...although it did include, if you look
> closely enough, a reference to motorcycling and (by implication) my 
> oilhead
> which I've finally got out on the road this week.
>
> Anyway, here's something really on-subject:
>
> The bike is my '93 R1100RS. RS as is "Running Sh***y"
>
> Last season it kept running worse and worse until I finally decided, 
> "Maybe
> it's that head gasket that's been seeping for the past 2-3 years". So I
> replaced the head gasket and while I was at it did an almost-complete 
> (and
> overdue) major maintenance including valve adjust, new plugs (Bosch
> 2-electrode), and replacing the fuel filter (but not a TB synch, since 
> at
> that time I still didn't have a Twinmax. I'd been using a pair of 
> vacuum
> gages for the past few years, which weren't very good or easy to use, 
> but
> had at least allowed me to keep it running half-way decently).
>
> But after all that it still ran lousy. I chalked it up to poor TB 
> settings,
> but by then it was the end of the season.
>
> I finally got a Twinmax and last Sunday I did the Lentini zero=zero
> procedure. I also discovered a pebble wedged into the pully on the 
> left TB,
> which the cable to the right TB would have ramped-up on to and thus 
> ensured
> no possibility of off-idle synch. "Aha!" I thought, but after all that 
> it
> still it runs lousy. Thinking maybe the injectors were dirty, I dumped 
> some
> injector cleaner in the gas, but it hasn't had any noticeable effect 
> yet
> (that was 100+ miles ago). It's possible I got a bad batch of gas, but 
> note
> the problems extended over several tankfuls last season, and the 
> filter has
> been changed since then.
>
> Here are the symptoms:
>
> 1. Doesn't want to idle. Bypass screws were pretty cruddy, so I cleaned
> them and shot cleaner into their orifices, but it didn't seem to help. 
> I've
> backed them out ALL THE WAY and it barely makes a difference in idle 
> speed.
>
> 2. Lots of backfiring, belching, missing and surge.
>
> 3. Down on power
>
> 4. Runs rough
>
> 5. Even harder to start than usual (it's ALWAYs been the worst-starting
> bike I've ever had).
>
> 6. Note, this engine got a dose of diesel-contaminated gas a few years
> back. At the time I drained the tank, replaced the filter, and put it 
> back
> in service, and it ran well for the next couple seasons.
>
> The next thing I'm planning to check is the compression, just to make 
> sure
> I don't have a bad valve, and also check to make sure the sparks look 
> fat.
> No reason to assume ignition timing has changed, though I suppose it's
> possible.
>
> But I frankly assume the problem is the throttle bodies, which because 
> they
> are Bings means they were utterly [insert expletive adjective here]
> worthlesss pieces of [insert expletive adjective here] [insert 
> expletive
> noun here] to start with, let alone with 70k miles on them. The intake
> spigots do show evidence of leakage (i.e., accumulation of dirt/greasy
> residue) indicating they are sucking air; so I'll probably end up 
> replacing
> them, and while doing that I'll tear down the TBs and just clean 
> everything
> up as well as I can.
>
> But maybe the [insert expletive adjective here] Bings are worn out; has
> anyone found that happening at around 70k? I know the bushings 
> eventually
> go out and are all but impossible to repair. If that's the case, I'll 
> be
> looking for a pair of Dell Orto carbs, 'cause I'll be damned if I'm 
> going
> to buy anything made by Bing. Anybody know of a secondhand set or 
> source
> for new Dell Orto's? The bore is 36mm or so I think.
>
> I'll continue to work my way thru the diagnostic process but if 
> anybody has
> been willing to put up with my diatribe and thinks they've seen all 
> this
> before and knows what the silver bullet is, lemme know.
>
> John Dancoe
> jdan@xxxxxxxx

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