weak cold idle
#1
weak cold idle
asking if my very weak cold idle is a result of a mechanical issue or can it be tuned out.
car runs well, idles well enough warm and hot, but wants to idle cold at about 250 rpm.
iow not. would like to see a more oe type warm up idle of 1500. takes about three blocks or so before it will maintain idle. or I guess till the coolant gets over 130
car has largish cams and is set to idle at 1050. have tried high timing and low timing As well as trying richer or leaner afr.
ecu tuned and running V7. 96530706
car runs well, idles well enough warm and hot, but wants to idle cold at about 250 rpm.
iow not. would like to see a more oe type warm up idle of 1500. takes about three blocks or so before it will maintain idle. or I guess till the coolant gets over 130
car has largish cams and is set to idle at 1050. have tried high timing and low timing As well as trying richer or leaner afr.
ecu tuned and running V7. 96530706
#6
except for lean spool which I have bit offed
at one time I read you raised your biss through the roof, but then it seemed you had a high idle(?) . but on that page you only mention getting your biss close to the wanted idle.--which is about where I am.
at one time I read you raised your biss through the roof, but then it seemed you had a high idle(?) . but on that page you only mention getting your biss close to the wanted idle.--which is about where I am.
Last edited by nothere; Feb 10, 2010 at 05:21 PM.
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#12
Evolved Member
iTrader: (50)
Adjust the BISS and set it until you see about 20 + or - 5 ISC steps at idle. turn off the car, restart it and let it relearn ISC steps from start up to idle and then let it idle for about 5 minutes and readjust BISS to get 20 ISC steps if it is off. You may also need to pull fo the IAC and give it a cleaning also... Hope that helps.
One more thing to mention, make sure and check fuel trims afterwards sometimes adjusting the BISS will through off the fuel trims.
One more thing to mention, make sure and check fuel trims afterwards sometimes adjusting the BISS will through off the fuel trims.
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