RPM drops when it is colder outside. - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

roel03 · 07-11-2011, 06:00 AM

I have been having this problem for a while now on my S14 KA and need to figure out what it is.

Background on what is related:
Turbo S14 KA
S13 ECU
Intake air temp sensor not connected since went turbo
Blow-off valve recirculated
New plugs, wires, fuel filter
New grounds
Throttle Body cleaned
Lightweight flywheel

Pretty much when going into neutral or coming to a stop, the revs drop. Going from ~950 to ~600. Only happen in colder weather or at night. I live in Florida and daily its 90-95 but at night or in the morning it's 70 ish. Whenever that happens the idle does not hold. During the day it holds perfect at the target idle.

Any ideas what I should check?

07-11-2011, 06:00 AM	#1
roel03 Zilvia Addict Join Date: Oct 2006 Location: florida Age: 37 Posts: 807 Trader Rating: (23) Feedback Score: 23 reviews	RPM drops when it is colder outside. I have been having this problem for a while now on my S14 KA and need to figure out what it is. Background on what is related: Turbo S14 KA S13 ECU Intake air temp sensor not connected since went turbo Blow-off valve recirculated New plugs, wires, fuel filter New grounds Throttle Body cleaned Lightweight flywheel Pretty much when going into neutral or coming to a stop, the revs drop. Going from ~950 to ~600. Only happen in colder weather or at night. I live in Florida and daily its 90-95 but at night or in the morning it's 70 ish. Whenever that happens the idle does not hold. During the day it holds perfect at the target idle. Any ideas what I should check?