Warm weather= low rough idle??
#17
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Cold starts it idles a little over 1k but,once it's out in the sun it idles down to 100-200 then stalls.Last couple times it would stall once I come to a stop and it's in neutral so I would have to run the a/c a little.I haven't touched throttle plate screw.The engine codes only come up right before it stalls also.Cold starts it's fine
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Monday I had no problems and the weather was cloudy/warm then tuesday it started again with the low idle but,didn't stall smoked a little.After that it drove fine the rest of the day.Ideas?
#21
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Since your problem is with the engine warm, I'd replace the engine coolant temp (ECT) sensor on the intake manifold. It's about a $9 part, and it tells your ECU how rich/lean to make the air/fuel mix. My ls400 had similar problems with strong exhaust smell, poor hot performance, bad gas mileage, poor idle. Replacing that and a leaking EGR modulator valve that had a ruptured diaphragm in it completely solved my issues.
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Since your problem is with the engine warm, I'd replace the engine coolant temp (ECT) sensor on the intake manifold. It's about a $9 part, and it tells your ECU how rich/lean to make the air/fuel mix. My ls400 had similar problems with strong exhaust smell, poor hot performance, bad gas mileage, poor idle. Replacing that and a leaking EGR modulator valve that had a ruptured diaphragm in it completely solved my issues.
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