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Old 11-12-2016, 05:08 AM   #1
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Batt light Rough idle car stalls when I'm slowing down

Hey guys I have a 05 zx4 duratec and I'm stomped,so here's my issue I have a cel I pulled the code, and it's p0171 system lean, also my battery light comes on while driving. I swapped battery still problem persist. So I noticed when I'm slowing down from freeway exit car will idle rough and stall of I don't give it gas or a rev, I feared it was my alternator but that's fine because car will start back up without hesitation and batt is still charging. So my guess is I have a vacuum leak or something causing the p0171, I tried to spray carb cleaner on vacuum lines trying to find leak but no luck. And ideas? And I don't know where to begin with my battery problem please some one help me. 05 Manual Zx4 110 thousand miles Az climate


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Old 11-12-2016, 06:48 AM   #2
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Busted PCV hose buried under the intake manifold...................common problem on duratecs.
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Fix the driver first, then fixing the car becomes so much easier..........
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Old 11-12-2016, 07:29 AM   #3
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So what about my battery light problem?
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Old 11-12-2016, 12:20 PM   #4
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As the car stalls, the accessory belt isn't turning fast enough to turn the alternator to produce voltage. The "battery" light - really the charging system light - should flicker on and off under these circumstances.

If the light comes on during constant speed "normal driving", you have a separate problem; you need to test alt output at speed. It should be 14.5V +/- You can use the instrument cluster test mode to see electrical system voltage while driving.
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