I had a terrible time getting my 1.9 to idle. I finally started looking at the things that had not been adressed in previous repairs. The kinds of things NOBODY looks at. I found that the bottom edge of the throttle plate - the butterfly attached to the shaft - was worn on its bottom edge. It was creating a gap at the bottom edge of greater than 0.080"! Yes, it had worn about 2mm. away, and the gap down there made it IMPOSSIBLE to get a decent (or any) idle. The AFM system cannot deal with a "leak" of this size at idle. And wost of all, you will never find it any other way....

roger sisler <rogersisler2000@YAHOO.COM> wrote:  This 1.9 is stupid. I did major swap outs today,and still cant get this thing to hold an idle.Well ,it will idle ,but not steady ,when warm. When cold,forget it.No hint of a idel. It stalls out everytime.
I swapped out the exhaust.Thats right,the pin hole leak was there ,but didnt cause my problems.I swapped the tailpipe,muffler,cat,and j pipe ,as a unit.Then I swapped a afm,hall control,idle stabilizer.The o2 sensor swapped with the exhaust unit. I swapped the rubber elbo betweenthe afmand throttle.Oh, I adjusted the throttle switch,again. I went through the Bentley twice and all comoponents check out.the all did so ,before the swap party.I went over all hose connections and removed the hoses and checked each for a hole.No holes at all. I put goop on the hoses that attach to the rubber boot at the afm/throttle.I tried many different timing positions.The auxillery air regulater is good.I checked it last week when I did a minor swap out. NADA!! Anybody wanna stick their neck out and suggest a fix?? Dont say ,get a Ford.Roger

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