Originally Posted by Hanuman
I guess so, although I've not had an issue yet, I know others have, for various reasons. But there are other things to check, too.
To the best of my knowledge, it will largely be the same sort of setup as my WR, albeit with different hoses, etc, for the engine bay layout. Any chance of a picture of the engine bay? A good one, not blurry, or obscure.
I personally find the WR pretty straight forward to setup. I usually do it by ear. 3mm Long Allen key for adjusting mixture, and small screwdriver for the idle air. But the WR has no weird idle controls. I'm not sure about the 100/200, even at that vintage, so most of my thoughts are about the WR.
Bad idle
Is the throttle body clean? Quite often some serious gumming up around the idle screw. Leads to unreliable idle. Sometimes seen as a stall approaching junctions, until it gets to the point of not idling at all.
Wrong Mixture
As you've changed some other components, it may be that you've undone some adjustments made, which previously compensate for a poor performing fuel system.
By ear.
I tweak the idle screw until it idles. Worst case, I just open the throttle Very Very slightly while making a rough setting.
Then I simply adjust the mixture until it peaks in rpm.
i.e. If it's rich, I adjust towards lean until I hear the RPMs rise. Peak is close to ideal mixture. Go further towards lean, and RPM will drop again.
Likewise, if it's too lean, I adjust towards rich. Again, as mixture approaches ideal, the RPMs will rise slightly. Go too rich, and they drop again.
Oddly, if it's running, you can adjust to the point of being hugely rich, without it stalling. However, if you do stop the engine, you can be in a situation where it won't start.
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