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This might not be that technical for a guy like yourself but Ill shoot anyway. Upon start up on my Willy, the revs settle at a lovely 960ish. Now after ragging it the revs then settle to a over excited 1200 or so sometimes higher. I have a feeling it is the idle control valve but how does it work? Has anyone else had similar probs?
lol, I was taking more generic things, but since you asked...
could be the WTS (Water temp sensor)
this signals an enrichment to the ecu during warm up, problems with the sensor can cause the issue you describe.
there are 2 possible types of sensor - NTC or PTC (Negative temperature coefficient or Positive temperature coefficient. on an NTC the sensor should read 1.5 to 2.2 volts at an ambient temp of 20 degrees (Water temp) - when the water temp is apx 80-100 degrees c, the reading should be 0.1 to 0.2
on a PTC sensor, the voltage at ambient should read .5v at ambient and 1.2 volts at over 80 degrees c.
the idle control valve fitted to the multipoint injection by RENIX is either a 2 wire or 3 wire device.
It works by the ECU pulsing it to open or close bypassing air from the outer side of the throttle plate to compensate for warm up and engine load (ie headlights)
the 2 wire will fail safe if it dies, the 3 wire will just end up where it was
Best bet is the WTS.
also, check for induction leaks as this can cause a similar problems.
I believe the problem with the masturbatell engines (Wankel) were that the engines were, and probably still are - ahead of their time..
they suffered tip seal failures and the materials were not the best.. even now. the rotary has suffered due to the green rush.. it is probably 15-25% LESS efficent than its uppy downy competitor due to the inlet / outlet design.. and suffers consequently from poor idle (It can be made to idle as a compromise !)
there is a similar design by Veselovsky.. try a search ... that gets around some of the problems.
however, the modern ECM /ECU and the advancements in simple 4 stroke design are out stripping any benefits thus far. Renault (and several others ) are looking into the next quantum leap - electromagnet camshaftless valves.. you can rule the world with that LOL
Now, re the smokers... hmmmmmmm, yep.. we can all breath crappy soot, or, the hole in the ozone layer gets bigger.... ROLL ON THE WARM WEATHER I say hee hee..
Re the fuel cell... (as in tank - not power source) in its simplest form it is purely a mechanism to assist deformation and containment of the fuel in the event of accident.. a simple rubber cell that is reistant to impact damage is often used - along with a favourable location... indeed, Concordes tanks were lined with bag celss aflter the parisians set a record for fasted airport to hotel transfer..