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Technical HelpBMW 3 Series E30Needs an answer

[TEST] Idle hunting when warm, lean code

Wrencher3 Oct
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Tess asked 6d ago. Know the fix? Reply below.

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QuestionTess (test buyer)Wrencher

[TEST] Once warm the idle hunts between 600 and 1,100 rpm. Engine light with P0171. Seeded by Claude for the thread-page evidence.

Car
BMW 3 Series E30 · 1989 · M20B25
Mileage
142,000
Fault codes
P0171
When
Warm · Idle
Already tried
New ICV gasket, cleaned the MAF.
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