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SN95 Cobras
Dyno shows lean condition
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<blockquote data-quote="93Cobra#2771" data-source="post: 1355631" data-attributes="member: 4599"><p>Lee - Sounds like your chip was burnt a little lean for you. The fuel pressure might work as a temporary fix, but the EEC will write long term fuel corrections to make up for the additional fuel pressure, and it applies those corrections to both part throttle and WOT runs (otherwise known as the "adaptive process"). 93 and older models apply adaptive fuel trims at WOT but do not write them. 94 and newer models apply adaptive fuel trims at WOT, and will also write adaptive fuel trims at high load/Closed loop operation.</p><p></p><p>My ultimate suggestion would be for you to get your chip reburnt, as you are flirting with blown head gasket territory...</p><p></p><p>One other thing to check for is if the dyno wideband is properly calibrated. Easiest way to test that is for them to do a wideband reading on your car at idle. It should read ~14.7:1...</p></blockquote><p></p>
[QUOTE="93Cobra#2771, post: 1355631, member: 4599"] Lee - Sounds like your chip was burnt a little lean for you. The fuel pressure might work as a temporary fix, but the EEC will write long term fuel corrections to make up for the additional fuel pressure, and it applies those corrections to both part throttle and WOT runs (otherwise known as the "adaptive process"). 93 and older models apply adaptive fuel trims at WOT but do not write them. 94 and newer models apply adaptive fuel trims at WOT, and will also write adaptive fuel trims at high load/Closed loop operation. My ultimate suggestion would be for you to get your chip reburnt, as you are flirting with blown head gasket territory... One other thing to check for is if the dyno wideband is properly calibrated. Easiest way to test that is for them to do a wideband reading on your car at idle. It should read ~14.7:1... [/QUOTE]
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Dyno shows lean condition
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