Sr20det Idle issue and no throttle response - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Coreypell · 07-20-2015, 03:10 PM

Recently got my sr20det swapped and KINDA running. basically when i start it up it has a weird high pulsing idle and no throttle response. Its kind of a vague explanation but i have a link to a video i took of the engine. Any help in figuring out whats wrong would be awesome! Thanks!

https://www.youtube.com/watch?v=S30O2jHR71U

adey · 08-03-2015, 10:40 AM

Check your Throttle Position Sensor - is the wiring good? the sensor? all plugged in?

cotbu · 08-03-2015, 11:07 AM

Do a power balance test, spark and fuel. pull codes

daryl337 · 08-11-2015, 02:33 PM

Check MAFS.

The pulsing idle like that is almost universally associated with MAFS issues

Coreypell · 09-22-2015, 03:23 PM

Finally was able to start working on the car again. I went ahead and pulled the codes and it comes up with 2.

Code 12 - Air Flow Meter
Code 34 - Knock Sensor

I checked all the voltages going to the MAF.
The black/white stripe wire reads 11.6v almost battery voltage and the brownish with wire fluctuates between .03v and .06v while its running the way it is.

Coreypell · 10-29-2015, 11:26 AM

Figured it out. It was the maf. I ordered a new maf fired right up like normal

07-20-2015, 03:10 PM	#1
Coreypell Join Date: Jul 2015 Location: Oviedo Posts: 4 Trader Rating: (0) Feedback Score: 0 reviews	Sr20det Idle issue and no throttle response Recently got my sr20det swapped and KINDA running. basically when i start it up it has a weird high pulsing idle and no throttle response. Its kind of a vague explanation but i have a link to a video i took of the engine. Any help in figuring out whats wrong would be awesome! Thanks! https://www.youtube.com/watch?v=S30O2jHR71U

08-03-2015, 11:07 AM	#3
cotbu Post Whore! Join Date: Sep 2005 Location: SWFL Age: 47 Posts: 3,318 Trader Rating: (3) Feedback Score: 3 reviews	Do a power balance test, spark and fuel. pull codes __________________ LoverTechnologies "Half Broken Things!"

08-11-2015, 02:33 PM	#4
daryl337 Zilvia Junkie Join Date: Aug 2005 Location: Pac NW Age: 35 Posts: 589 Trader Rating: (1) Feedback Score: 1 reviews	Check MAFS. The pulsing idle like that is almost universally associated with MAFS issues __________________ This is my clever and witty signature.

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08-03-2015, 10:40 AM	#2
adey Post Whore! Join Date: Mar 2002 Location: Hong Kong Posts: 3,061 Trader Rating: (0) Feedback Score: 0 reviews	Check your Throttle Position Sensor - is the wiring good? the sensor? all plugged in?

09-22-2015, 03:23 PM	#5
Coreypell Join Date: Jul 2015 Location: Oviedo Posts: 4 Trader Rating: (0) Feedback Score: 0 reviews	Finally was able to start working on the car again. I went ahead and pulled the codes and it comes up with 2. Code 12 - Air Flow Meter Code 34 - Knock Sensor I checked all the voltages going to the MAF. The black/white stripe wire reads 11.6v almost battery voltage and the brownish with wire fluctuates between .03v and .06v while its running the way it is.

10-29-2015, 11:26 AM	#6
Coreypell Join Date: Jul 2015 Location: Oviedo Posts: 4 Trader Rating: (0) Feedback Score: 0 reviews	Figured it out. It was the maf. I ordered a new maf fired right up like normal