95 stock KA dying while driven - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

Ice77 · 08-21-2018, 03:37 PM

Hey all, new to the forum tried searching but couldn’t really find anything about my specific issue so here goes.

I started noticing some hesitation in the car when driving on the highway, wasn’t terrible but seemed to get progressively worse over a short amount of time. At this point the car will start to sputter and die out after it runs for a little bit, but it is quite random There is a knock sensor code (and a transmission code that my mechanic friend said wouldn’t cause my issue) the car will start and run perfectly, but will randomly start shutting off once warm, if I pull over and don’t touch the gas it will idle it is a little rough but if I give it gas it will die and doesn’t want to start for a little bit. Once it cools down a little (5 to 10 minutes) it runs perfect again. The maf is new as well as distributor, the cap and rotor the fuel pressure is exactly where it should be and doesn’t drop as it is sputtering and dying out. It isn’t over heating either someonne suggested it could be a bad ecu but I don’t really wanna throw parts at it and pray. When I changed the maf it ran perfect for about 4 days then started again. Any thoughts from people experienced with this engine or this issue would be helpful

***FaLKoN240*** · 08-21-2018, 03:56 PM

Fuel pump . .

Ice77 · 08-21-2018, 04:17 PM

Tested the fuel pressure while it was acting up and at idle it was about 35 psi and went up to 45 psi when given gas. I tested the spark when on the side of the road and sent a video to my mechanic buddy an he said the spark wasn’t right. I probably should have included this info above sorry

Ice77 · 10-23-2018, 05:16 AM

Well after a lot of searching, trouble shooting following the FSM. I tested every sensor that could cause any of the issues. I had multiple codes for various sensors as well changed all of them and eventually lost spark, at the end found out it was a bad ECU. Not sure if I even needed to change the things I did but car is running perfectly at the moment.

[240sx] · 10-23-2018, 08:12 AM

Only 2 previous post ever, and you had the decency to share your resolution with this thread. Kudos sir.

240sxTuck · 10-23-2018, 09:48 AM

Quote:

Originally Posted by Ice77

at the end found out it was a bad ECU. Not sure if I even needed to change the things I did but car is running perfectly at the moment.

Honestly, that's usually how it goes with bad ECUs. You can suspect the ECU is bad from the get go, but you'll never know until you replace everything else.

08-21-2018, 03:37 PM	#1
Ice77 Join Date: Jun 2018 Location: Florida Age: 43 Posts: 11 Trader Rating: (0) Feedback Score: 0 reviews	95 stock KA dying while driven Hey all, new to the forum tried searching but couldn’t really find anything about my specific issue so here goes. I started noticing some hesitation in the car when driving on the highway, wasn’t terrible but seemed to get progressively worse over a short amount of time. At this point the car will start to sputter and die out after it runs for a little bit, but it is quite random There is a knock sensor code (and a transmission code that my mechanic friend said wouldn’t cause my issue) the car will start and run perfectly, but will randomly start shutting off once warm, if I pull over and don’t touch the gas it will idle it is a little rough but if I give it gas it will die and doesn’t want to start for a little bit. Once it cools down a little (5 to 10 minutes) it runs perfect again. The maf is new as well as distributor, the cap and rotor the fuel pressure is exactly where it should be and doesn’t drop as it is sputtering and dying out. It isn’t over heating either someonne suggested it could be a bad ecu but I don’t really wanna throw parts at it and pray. When I changed the maf it ran perfect for about 4 days then started again. Any thoughts from people experienced with this engine or this issue would be helpful

08-21-2018, 03:56 PM	#2
*FaLKoN240* Super Moderator Join Date: Jun 2004 Location: SF Bay Area Posts: 16,760 Trader Rating: (73) Feedback Score: 73 reviews	Fuel pump . . __________________ Best way to do business with me? Make your best offer FIRST.

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08-21-2018, 04:17 PM	#3
Ice77 Join Date: Jun 2018 Location: Florida Age: 43 Posts: 11 Trader Rating: (0) Feedback Score: 0 reviews	Tested the fuel pressure while it was acting up and at idle it was about 35 psi and went up to 45 psi when given gas. I tested the spark when on the side of the road and sent a video to my mechanic buddy an he said the spark wasn’t right. I probably should have included this info above sorry

10-23-2018, 05:16 AM	#4
Ice77 Join Date: Jun 2018 Location: Florida Age: 43 Posts: 11 Trader Rating: (0) Feedback Score: 0 reviews	Well after a lot of searching, trouble shooting following the FSM. I tested every sensor that could cause any of the issues. I had multiple codes for various sensors as well changed all of them and eventually lost spark, at the end found out it was a bad ECU. Not sure if I even needed to change the things I did but car is running perfectly at the moment.

10-23-2018, 08:12 AM	#5
[240sx] Zilvia Addict Join Date: Oct 2013 Location: Highdesert Posts: 849 Trader Rating: (1) Feedback Score: 1 reviews	Only 2 previous post ever, and you had the decency to share your resolution with this thread. Kudos sir.