From recent experience: 1) idle had been a bit wobbly for a long time, I'd gotten used to it. Replacing the O2 sensor doubled the mixture flip-flop rate and made the idle rock-steady. Lazy sensor...Ken Lewis's little meter board would have shown that. 2) Contact with the ground apparently pushed on a heater hose enough to pop the coolant-pipe mounting stud out of the ?#1? induction tube. Result was nasty hunting idle and sporadic stopping at idle or decelerating to idle. Suggestive symptom (of a "false air" leak) was that O2 sensor would continue to show lean mixture for quite a while -- ten seconds or more after decelerating to idle, instead of rather quickly going back to flip-flop once the injectors come on again. Ken's meter or any other meter would show that one. david -- David Beierl -- dbeierl@attglobal.net |
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