Help on auto to manual - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Laujpha · 12-05-2016, 11:41 PM

I know there's a thousand threads about auto to manual swap, but this is a problem i ran into. I finish my swap on a 93 240sx but run into a problem.i did all the wiring correctly.the problem is that my car will idle at 1500 rpm all the time. When i drive its fine.when i stop it goes down to 700 rpm and jump right back ip to 1500 rpm. When the car is in complete stop or just running the engine,it would stay at 1500 rpm.running the auto ecu atm.any help please..

Ilya · 12-06-2016, 12:16 AM

Some times my cruise control cable or throttle cable gets stuck and leaves the throttle cracked open a bit.

Also, adjust your timing and idle. You just took off +58lb rotational mass called torque converter and replaced it with 25lb flywheel, that will definitely change the loading on your engine at idle

Laujpha · 12-06-2016, 12:21 AM

Thanks..i will try that and update on it.

Ilya · 12-06-2016, 12:27 AM

Or a vaccuum leak

NM_240sx · 12-06-2016, 08:40 AM

Pretty sure it's the auto ECU. I just did the swap and I kept my auto ECU and it will do that. Mine will eventually drop to regular idle after a few seconds though. Read somewhere it has to do with the auto ECU compensating for the torque converter, but with that gone it will idle high for a bit then correct itself.

Laujpha · 12-10-2016, 02:02 PM

I did my timing still nothing.it would still idle over 1300...if i close the screw in the back of the intake manifold, when i run and come to a complete stop..my engine shuts down.. So yeah i got a manual kade ecu and when i plug in the ecu,start smoking..not sure why or do i have to do some wiring in order for the car to run normally

12-05-2016, 11:41 PM	#1
Laujpha Join Date: Dec 2016 Location: California Age: 36 Posts: 20 Trader Rating: (0) Feedback Score: 0 reviews	Help on auto to manual I know there's a thousand threads about auto to manual swap, but this is a problem i ran into. I finish my swap on a 93 240sx but run into a problem.i did all the wiring correctly.the problem is that my car will idle at 1500 rpm all the time. When i drive its fine.when i stop it goes down to 700 rpm and jump right back ip to 1500 rpm. When the car is in complete stop or just running the engine,it would stay at 1500 rpm.running the auto ecu atm.any help please..

12-06-2016, 12:16 AM	#2
Ilya Zilvia Addict Join Date: Jan 2008 Location: San Diego Age: 34 Posts: 712 Trader Rating: (2) Feedback Score: 2 reviews	Some times my cruise control cable or throttle cable gets stuck and leaves the throttle cracked open a bit. Also, adjust your timing and idle. You just took off +58lb rotational mass called torque converter and replaced it with 25lb flywheel, that will definitely change the loading on your engine at idle

12-06-2016, 12:21 AM	#3
Laujpha Join Date: Dec 2016 Location: California Age: 36 Posts: 20 Trader Rating: (0) Feedback Score: 0 reviews	Thanks..i will try that and update on it.

12-06-2016, 12:27 AM	#4
Ilya Zilvia Addict Join Date: Jan 2008 Location: San Diego Age: 34 Posts: 712 Trader Rating: (2) Feedback Score: 2 reviews	Or a vaccuum leak

12-06-2016, 08:40 AM	#5
NM_240sx Join Date: Mar 2011 Location: New Mexico Age: 33 Posts: 47 Trader Rating: (4) Feedback Score: 4 reviews	Pretty sure it's the auto ECU. I just did the swap and I kept my auto ECU and it will do that. Mine will eventually drop to regular idle after a few seconds though. Read somewhere it has to do with the auto ECU compensating for the torque converter, but with that gone it will idle high for a bit then correct itself.

12-10-2016, 02:02 PM	#6
Laujpha Join Date: Dec 2016 Location: California Age: 36 Posts: 20 Trader Rating: (0) Feedback Score: 0 reviews	I did my timing still nothing.it would still idle over 1300...if i close the screw in the back of the intake manifold, when i run and come to a complete stop..my engine shuts down.. So yeah i got a manual kade ecu and when i plug in the ecu,start smoking..not sure why or do i have to do some wiring in order for the car to run normally