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richierichness · 01-26-2017, 01:05 PM

s14 w/stock rb25 s2
q45 TB
Greddy knock off
VE tuning with Haltech Elite 2500

What are most people doing to clean up the idle on their RBs? This thing is a nightmare once the engine warms up. If I target any RPM below 1100 the idle will bounce around and eventually the engine will stall. My goal is stable idle between 700 and 900 rpm.

Steps taken so far:
-Adjusting IAC screw
-Tuning fuel via open and closed loop
-Unplugging IAC and valve
-Boost Leak Testing
-Fuel pressure is good (43 psi)
-New injectors (900 cc)
-New Battery
-New plugs gapped to .030"
-Ohms coil pack testing (hot and cold tests)
-O2 (Haltech) Wideband sensor is functioning properly (deleted oem narrowband)

Steps I have not taken yet:
-Replace Coolant Temp Sensor
-Clean IAC and valve
-Diagnostics testing for IAC,valve, or TPS (does this need to be done?)
-Clean Throttle body

Should I stop fucking with this and completely delete the IAC system?

Should I go 1 step further and do a drive by wire TB? Does anyone make a kit or parts to support drive by wire with the RB's?

01-26-2017, 01:05 PM	#1
richierichness Join Date: Oct 2015 Location: Virginia Age: 38 Posts: 29 Trader Rating: (0)	IAC Delete or Drive by Wire? s14 w/stock rb25 s2 q45 TB Greddy knock off VE tuning with Haltech Elite 2500 What are most people doing to clean up the idle on their RBs? This thing is a nightmare once the engine warms up. If I target any RPM below 1100 the idle will bounce around and eventually the engine will stall. My goal is stable idle between 700 and 900 rpm. Steps taken so far: -Adjusting IAC screw -Tuning fuel via open and closed loop -Unplugging IAC and valve -Boost Leak Testing -Fuel pressure is good (43 psi) -New injectors (900 cc) -New Battery -New plugs gapped to .030" -Ohms coil pack testing (hot and cold tests) -O2 (Haltech) Wideband sensor is functioning properly (deleted oem narrowband) Steps I have not taken yet: -Replace Coolant Temp Sensor -Clean IAC and valve -Diagnostics testing for IAC,valve, or TPS (does this need to be done?) -Clean Throttle body Should I stop fucking with this and completely delete the IAC system? Should I go 1 step further and do a drive by wire TB? Does anyone make a kit or parts to support drive by wire with the RB's?