This DIY can help with a number of things: Low Idle, Shutting down engine at Idle, Vacuum leak diagnoses, IACV check.
Its a DIY because it only involves a screwdriver!
1) Start engine, let it get fully warm
2) When at normal warmed up temp, remove electrical connector off IACV. Engine will remain running, but at lower RPM or Engine will turn off.
NOTE: If while IACV connector is off, you can not adjust idle down to 600 RPM, then you have a vacuum leak.
3a) If motor remains running, using flat-blade screwdriver adjust idle screw to 600 RPM idle. Idle screw CCW raises RPM, CW lowers RPM. Then, plug IACV connector back on and idle will automatically adjust to about 700-800 RPM.
3b) If engine switches off, using a flat-blade screwdriver turn the idle screw clockwise 180 deg. and repeat step2. Repeat step3b until engine remains running when IACV connector removed. Then, move to step3a, going to step # 4 after. Idle screw CCW raises RPM, CW lowers RPM.
4) Turn off engine. Remove the 2, 7.5A ECU backup/radio (under-hood and in the driver foot well) fusebox fuse for 10 seconds, then reinsert to allow ECU to reset itself.
5) Your base idle is set properly.
Like I said this is a dual purpose DIY as it can determine if the IACV is working properly or not.
It applys to any engine, but this particular DIY is aimed at 4th 5th 6th gen. Let me know if its works for others
Its a DIY because it only involves a screwdriver!
1) Start engine, let it get fully warm
2) When at normal warmed up temp, remove electrical connector off IACV. Engine will remain running, but at lower RPM or Engine will turn off.
NOTE: If while IACV connector is off, you can not adjust idle down to 600 RPM, then you have a vacuum leak.
3a) If motor remains running, using flat-blade screwdriver adjust idle screw to 600 RPM idle. Idle screw CCW raises RPM, CW lowers RPM. Then, plug IACV connector back on and idle will automatically adjust to about 700-800 RPM.
3b) If engine switches off, using a flat-blade screwdriver turn the idle screw clockwise 180 deg. and repeat step2. Repeat step3b until engine remains running when IACV connector removed. Then, move to step3a, going to step # 4 after. Idle screw CCW raises RPM, CW lowers RPM.
4) Turn off engine. Remove the 2, 7.5A ECU backup/radio (under-hood and in the driver foot well) fusebox fuse for 10 seconds, then reinsert to allow ECU to reset itself.
5) Your base idle is set properly.
Like I said this is a dual purpose DIY as it can determine if the IACV is working properly or not.
It applys to any engine, but this particular DIY is aimed at 4th 5th 6th gen. Let me know if its works for others