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SN95 Cobras
Throttle hang / high oil pressure????
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<blockquote data-quote="mwolson" data-source="post: 10701626" data-attributes="member: 16006"><p>If you have a tune, then there is a lot the tuner can do, as SVT Pille says, including datalogging to help figure out what the root cause is if it is mechanical.</p><p></p><p>However, in these cars, (LLX3 & LLX4 tunes), the TPS voltage is not that critical. The PCM learns the throttle position, which is why logging TPS Relative is more relevant than logging TPS Absolute is. </p><p></p><p>In our tunes, the idle control system is very complex. The coarse idle control is done using air via the IAC valve. The fine idle control is done using spark advance.</p><p></p><p>Unless you have a vacuum leak, a binding throttle cable and/or a dirty/bad IACV, you are just shooting in the dark trying to debug idle issues without datalogging.</p></blockquote><p></p>
[QUOTE="mwolson, post: 10701626, member: 16006"] If you have a tune, then there is a lot the tuner can do, as SVT Pille says, including datalogging to help figure out what the root cause is if it is mechanical. However, in these cars, (LLX3 & LLX4 tunes), the TPS voltage is not that critical. The PCM learns the throttle position, which is why logging TPS Relative is more relevant than logging TPS Absolute is. In our tunes, the idle control system is very complex. The coarse idle control is done using air via the IAC valve. The fine idle control is done using spark advance. Unless you have a vacuum leak, a binding throttle cable and/or a dirty/bad IACV, you are just shooting in the dark trying to debug idle issues without datalogging. [/QUOTE]
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Throttle hang / high oil pressure????
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