rough idling after 5 speed swap complete - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

sifu · 01-26-2006, 08:01 PM

i finally finished my s14 auto to 5speed swap but now i'm getting a rough idle when i start the car. it dies below 1k rpm in neutral

this is after a test drive

i'm running an auto ecu. crankshaft sensor is broken. could it be on my intake somewhere, IACV? could it be because of any of the sensors on the tranny?

SaGang227 · 01-26-2006, 08:09 PM

It could be vacuum leak.
Check to make sure that you don't hear any air leak when idling.

*NemeGuero* · 01-26-2006, 08:32 PM

Try replacing the ECU, check for vacuum leaks, get the CAS fixed, clean the IACV, and then report back.

jdm538 · 01-26-2006, 11:54 PM

im not sure but i dont have any sensors connected from the tranny besides the speed and reverse, also i ran with an auto ecu with no problem. i have a s14 with s13 tranny. no problems i dont think it have anything to do with setup you might have hit something during the swap.

Lith · 01-27-2006, 08:08 AM

it's the Auto ECU. Rev the car a bit once you start it up. That happens because you took out the Automatic Tranny control unit when you put the clutch pedal in.
edit: getting 5spd. ecu would solve that problem

sifu · 01-27-2006, 11:06 AM

i have a 96 manual ecu, i'll put that in and put my new crank position sensor in.

01-26-2006, 08:01 PM	#1
sifu Leaky Injector Join Date: Feb 2005 Location: Oklahoma Posts: 72 Trader Rating: (0) Feedback Score: 0 reviews	rough idling after 5 speed swap complete i finally finished my s14 auto to 5speed swap but now i'm getting a rough idle when i start the car. it dies below 1k rpm in neutral this is after a test drive i'm running an auto ecu. crankshaft sensor is broken. could it be on my intake somewhere, IACV? could it be because of any of the sensors on the tranny?

01-26-2006, 08:32 PM	#3
NemeGuero No more nissan. Join Date: Jan 2003 Location: RAIN, Washington. Age: 36 Posts: 8,132 Trader Rating: (10) Rides Gallery: NemeGuero Feedback Score: 10 reviews	Try replacing the ECU, check for vacuum leaks, get the CAS fixed, clean the IACV, and then report back. __________________

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

01-26-2006, 08:09 PM	#2
SaGang227 Leaky Injector Join Date: Oct 2004 Location: Northern Virginia Age: 37 Posts: 93 Trader Rating: (0) Feedback Score: 0 reviews	It could be vacuum leak. Check to make sure that you don't hear any air leak when idling.

01-26-2006, 11:54 PM	#4
jdm538 Post Whore! Join Date: Apr 2003 Location: LA/OC SOCAL Posts: 3,517 Trader Rating: (30) Feedback Score: 30 reviews	im not sure but i dont have any sensors connected from the tranny besides the speed and reverse, also i ran with an auto ecu with no problem. i have a s14 with s13 tranny. no problems i dont think it have anything to do with setup you might have hit something during the swap.

01-27-2006, 08:08 AM	#5
Lith Zilvia Member Join Date: Feb 2005 Location: Toronto, ON Age: 41 Posts: 153 Trader Rating: (0) Feedback Score: 0 reviews	it's the Auto ECU. Rev the car a bit once you start it up. That happens because you took out the Automatic Tranny control unit when you put the clutch pedal in. edit: getting 5spd. ecu would solve that problem

01-27-2006, 11:06 AM	#6
sifu Leaky Injector Join Date: Feb 2005 Location: Oklahoma Posts: 72 Trader Rating: (0) Feedback Score: 0 reviews	i have a 96 manual ecu, i'll put that in and put my new crank position sensor in.