Z31 misses sometimes - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

JeremiahB · 09-10-2013, 05:30 PM

Hey guys

I just got the Z31 to stay running. Replaced the MAf and had no problems, it idles fine. Now I have a new problem. As im driving the car misses. It seems to happen more in the morning compared to any other time of the day. Ill press the gas and hear a little sputter and it wont pick up for a few seconds. Sometimes in the morning I will press the gas and nothing happens just followed by a misfire. Fuel pressure is good, Im getting no codes on the computer, and I just replaced all the spark plugs.

Any idea ..... CHTS

racepar1 · 09-10-2013, 06:26 PM

I would check the TPS. I just had a similar issue on my singlecam and the TPS was the cause. I'm not 100% sure on the Z31's, but on the singlecam's there is a TPS and a closed throttle position switch together in the same sensor. There should be two separate plugs on the sensor though.

09-10-2013, 05:30 PM	#1
JeremiahB Join Date: Aug 2013 Location: canada Age: 40 Posts: 2 Trader Rating: (0) Feedback Score: 0 reviews	Z31 misses sometimes Hey guys I just got the Z31 to stay running. Replaced the MAf and had no problems, it idles fine. Now I have a new problem. As im driving the car misses. It seems to happen more in the morning compared to any other time of the day. Ill press the gas and hear a little sputter and it wont pick up for a few seconds. Sometimes in the morning I will press the gas and nothing happens just followed by a misfire. Fuel pressure is good, Im getting no codes on the computer, and I just replaced all the spark plugs. Any idea ..... CHTS

09-10-2013, 06:26 PM	#2
racepar1 Post Whore! Join Date: Jul 2007 Location: Simi Valley, CA Age: 42 Posts: 9,006 Trader Rating: (106) Rides Gallery: racepar1 Feedback Score: 106 reviews	I would check the TPS. I just had a similar issue on my singlecam and the TPS was the cause. I'm not 100% sure on the Z31's, but on the singlecam's there is a TPS and a closed throttle position switch together in the same sensor. There should be two separate plugs on the sensor though.