how to reduce high idle?
09-15-2006, 01:21 PM
#1
how to reduce high idle?
been using Tunerpro now for a month with EBL.
moved my values from old bin to ebl.bin as best i could.
i find my car now idles smoothly at 1000-1100 rpms. open loop @ idle. manual trans. i show in whats up 0-1% TPS. idle stop screw barely touching if at all per last attempt to reduce idle. IAC is zero steps. i scored the 1995 7.4L TB off EBay two years ago and was/is new. used a GM base gasket for that model year so i will assume no vac leaks at TB. on WB the A/F shows 14.3/1. commanded to 14.3 at OL AFR in OL A/F CTS VAC. idles at 16 deg timing. i disconnected the charcoal canister at PCV and plugged PCV. only thing i have not checked is whether my stock throttle cable disallows the butterfly to close 100%. used an adjustable Edelbrock throttle bracket on Holley projection. i think the 0-1% TPS is in whats up is reading where it is at end of travel rather than its actual capacity. IOW that 0 is learned.
what else can cause a high idle?
moved my values from old bin to ebl.bin as best i could.
i find my car now idles smoothly at 1000-1100 rpms. open loop @ idle. manual trans. i show in whats up 0-1% TPS. idle stop screw barely touching if at all per last attempt to reduce idle. IAC is zero steps. i scored the 1995 7.4L TB off EBay two years ago and was/is new. used a GM base gasket for that model year so i will assume no vac leaks at TB. on WB the A/F shows 14.3/1. commanded to 14.3 at OL AFR in OL A/F CTS VAC. idles at 16 deg timing. i disconnected the charcoal canister at PCV and plugged PCV. only thing i have not checked is whether my stock throttle cable disallows the butterfly to close 100%. used an adjustable Edelbrock throttle bracket on Holley projection. i think the 0-1% TPS is in whats up is reading where it is at end of travel rather than its actual capacity. IOW that 0 is learned.
what else can cause a high idle?
09-15-2006, 01:35 PM
#2
Supreme Member
Ron,
Have you tried covering TB opening with your hands? See if it continues to run. If it does, there's a leak somewhere. I would also plug the canister hose.
My canister is unplugged that way waiting for RBob to come up with CCP control for N.O. CCP solenoid.
Have you tried covering TB opening with your hands? See if it continues to run. If it does, there's a leak somewhere. I would also plug the canister hose.
My canister is unplugged that way waiting for RBob to come up with CCP control for N.O. CCP solenoid.
09-15-2006, 02:02 PM
#4
Supreme Member
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