Thread: lean code rough idle

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  1. #1 lean code rough idle 
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    98 gtp. 1.9s, 3.4 pulley, headers and 103s. Random hard start with a rough idle and p0171 lean code. Any help is greatly appreciated
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  2. #2 Re: lean code rough idle 
    Killa Bee Scottydoggs's Avatar
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    check for a vac leak.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  3. #3 Re: lean code rough idle 
    Turbo is the way to go. BillBoost37's Avatar
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    check the EGR to LIM tube for cracks at the ends, do not spray stuff at it.. pull it off and look through it at light. 90% of them are cracked. Check TB gaskets and all others with carb/tb cleaner.
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  4. #4 Re: lean code rough idle 
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    Thanks for the quick response guys. Will check it out this evening and let you guys know.
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