#58520, "RE: resistor quesiton reguarding base fuel for sfmu" In response to Reply # 0
what size are your injectors? If you're idling fine (no black smoke out of the exhaust, no fuel smell, engine is not loud or shaking eradically), then leave it.
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#58713, "RE: resistor quesiton reguarding base fuel for sfmu" In response to Reply # 4
sorry I thought I replied to this...musta been a dream or it didn't go through or something. If it idles ok I say leave it alone...did you/can you datalog it? Or if it idles a little rough lower the idle pressure down to like 15 or something. Idunno...idle pressure seems pretty arbatray(sp) to me...beside a little stumble my car idles fine when I pull the sfmu vacuum hose off and the pressure goes from 25-30 to 40-45....never looks at the trims for that though the ECU is probably pulling quite a bit of fuel/duty cycle at that point. Hope that helps.
#58732, "RE: resistor quesiton reguarding base fuel for sfmu" In response to Reply # 5 Oct-16-03 01:33 PM by XtremeRS
Originally posted by micyek sorry I thought I replied to this...musta been a dream or it didn't go through or something. If it idles ok I say leave it alone...did you/can you datalog it? Or if it idles a little rough lower the idle pressure down to like 15 or something. Idunno...idle pressure seems pretty arbatray(sp) to me...beside a little stumble my car idles fine when I pull the sfmu vacuum hose off and the pressure goes from 25-30 to 40-45....never looks at the trims for that though the ECU is probably pulling quite a bit of fuel/duty cycle at that point. Hope that helps.
Kent, I can bring my pocketlogger with me this weekend at the meet, if you want to datalog your car I idle at 20 psi on the 310's, with great fuel trims. I got a too rich CEL(trims maxed out) at anything over 27-29 psi at idle. I idle at 17.5 hg's also..YOu'd be very surprised how fuel pressure affects fuel trims..even just several psi.
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#58745, "RE: resistor quesiton reguarding base fuel for sfmu" In response to Reply # 7
Matt,
That'll be cool...I do have my pressures turned up a little to be safe right now...I have a pocketlogger myself but I can't find my damn palm...LOL...If I find it I'll bring it and we can still play with my pressures...thanx alot ma
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I idle at 20 psi on the 310's, with great fuel trims. I got a too rich CEL(trims maxed out) at anything over 27-29 psi at idle. I idle at 17.5 hg's also..YOu'd be very surprised how fuel pressure affects fuel trims..even just several psi.
