'76 v-12 that grows too rich

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David Meadow Valley - 19 Sep 2006 18:19 GMT

Problem is this: a '76 v-12 that starts, idles and then grows too rich. Temp
sensor is fine, O2 sensor is correct, and the fuel pump, though an
aftermarket universal model, is pumping the right amount of pressure. Any
ideas? David Meadow Valley

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T.G. Lambach - 20 Sep 2006 02:52 GMT

Engine must have a device to control the air / fuel ratio, allowing more
air as the motor warms (or less fuel).

O2 sensor is typically excluded at cold start but ought to affect the
fuel quantity after warm up so the air part of the equation is suspect,
IMHO.

Generic motor answer, your Jaguar may differ.

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