S14 Timing Issue - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

justakouki · 04-11-2021, 10:51 AM

Hey, I have a built KA-T with an AEM Infinity 5 ECU and a custom WireWorx harness. I'm have a strange timing issues. The car intermittently retards timing. Sometimes I will start the car and it will run and driver perfectly fine, using the timing light it is at 20BTDC where I set it. Other times when I start it it will idle rough with poor throttle response, the timing light shows the timing advanced to 0BTDC. I can start the car back to back in 1 sitting and it could do either of these things. What could cause this?

LtSlayer · 04-25-2021, 08:22 PM

I'm not familiar with that ecu but stock timing is around 15, 20 timing is really pushing especially once boost kicks in, sounds like knock waiting to happen. try setting it to 15 through timing mode. on a stock ecu you disconnect tps and rev to 3k a couple times, this prevents the ecu from varying timing an lets you get a good reference for timing.

can you rev above 3k?

make sure the CAS was installed correctly as well, on SRs there's two dots that can be mistaken. gooddluck

04-11-2021, 10:51 AM	#1
justakouki Join Date: Apr 2021 Location: Florida Posts: 3 Trader Rating: (0) Feedback Score: 0 reviews	S14 Timing Issue Hey, I have a built KA-T with an AEM Infinity 5 ECU and a custom WireWorx harness. I'm have a strange timing issues. The car intermittently retards timing. Sometimes I will start the car and it will run and driver perfectly fine, using the timing light it is at 20BTDC where I set it. Other times when I start it it will idle rough with poor throttle response, the timing light shows the timing advanced to 0BTDC. I can start the car back to back in 1 sitting and it could do either of these things. What could cause this? Last edited by justakouki; 04-11-2021 at 12:46 PM..

04-25-2021, 08:22 PM	#2
LtSlayer Leaky Injector Join Date: Jul 2020 Location: Norco Posts: 69 Trader Rating: (0) Feedback Score: 0 reviews	I'm not familiar with that ecu but stock timing is around 15, 20 timing is really pushing especially once boost kicks in, sounds like knock waiting to happen. try setting it to 15 through timing mode. on a stock ecu you disconnect tps and rev to 3k a couple times, this prevents the ecu from varying timing an lets you get a good reference for timing. can you rev above 3k? make sure the CAS was installed correctly as well, on SRs there's two dots that can be mistaken. gooddluck