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Cold start idle w/ AC on problems

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Old 06-19-2009, 03:06 PM
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Default Cold start idle w/ AC on problems

Car in sig. On a cold start, if I turn on the AC too soon, then when coming to a stop it will regularly overshoot idle and stall. Usually won't restart easily unless AC is off. How do I resolve this?
Old 06-19-2009, 03:17 PM
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This may be an over-enrichment problem, the A/C
load will elevate MAP and push you richer on top
of the cold open-loop-EQ-vs-ECT-vs-MAP table
position. You might try skinnying down the cold
columns in that table, until it begins to make
starting or idle worsen in some other way.
Old 06-19-2009, 03:48 PM
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So you're saying lean it out in the cooler ECT columns... OK, how big of steps?




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