Re: A/F gauge results with RRFPR & 30# Injectors (90 SPG) - Saab Performance Bulletin Board - Saabnet.com
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Re: A/F gauge results with RRFPR & 30# Injectors (90 SPG)
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Posted by kooch (more from kooch) on Wed, 5 Jun 2002 13:37:18 Share Post by Email
In Reply to: A/F gauge results with RRFPR & 30# Injectors (90 SPG), Taylor, Wed, 5 Jun 2002 13:26:29
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high idle generally means limp home mode. was idle rock solid normal before the new injectors? if so, make sure everything you touched in the area of the fuel rail is tight and returned to normal. if it is, i would lean more towards a rich mixture at idle. 3.2 bar, w/ 30# injectors should be too rich at idle. try backing down to 2.8 or 2.5. you have to rrfpr to get you to higher fuel pressure under boost.

interesting with the a/f guage. you sure the colors are right? my autometer reads yellow when stoich, green when rich and red when lean. others i have seen, even with leds, also have same color configuration. if you are in the green at idle, you are more than likely too rich. if everything is working right, you should be in stoich at idle. but it will oscillate between rich and lean as the o2 sensor fine tunes the mixture. you should be able to get a rough idea of where the mixture is at idle, by disconnecting the o2 sensor from the ecu so you have a reading of the true mixture and not the corrected mixture. then you can set your fuel pressure to give you a stoich mixture at idle, then reconnect your o2 sensor.

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