Thread: EFI Idle issues
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s5uewf s5uewf is offline
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Join Date: Aug 2004
Location: Maryland
Posts: 732
what type of EFI are you using?

Sort of sounds like the mixture is off at idle and also since it is idling so low the alternator is kicking in to charge up the battery and that is making things worse when the light are on.

If you go to the Electromotive site and download their free TECgt install guide there is an entire section on setting idle. You may be able to use their tips to tune your idle up.

Do you have enough air getting in at idle? I only ask because I am wondering if you had more air entering at idle would you get more RPM's at idle? Assuming your mixture is not rich as it is and vacuum is not leaking - adding air should increase your idle - and you may then have to adjust mixture again.

You should have a cold idle and warm idle mapping ... if so, you may need to adjust both as it sounds like you have issues when cold and when warm.

1988 930 coupe - Silver Metallic
stock 3.3L w/GT35R, B&B Headers, RarlyL8 muffler, B&B intercooler, Tial wastegate, Electromotive tecGT based phased sequential EFI & ignition, Wevo shifter
Old 10-12-2011, 03:08 PM
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