Re: 90 Corolla 1.6 Hi NOx and pinging,,,

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Posted to Emissions Forum on 4/26/2001 1 Reply

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OK Kelly,

PCM ignition advance is, on most cars, a function of EGR. This means that anytime you disable EGR you automatically cause a reduction in PCM ignition advance. Restoring EGR operation autom... Login to read more.

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