Fuel pump prime and 30-1601 AEM EMS - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

sl87 · 09-15-2009, 01:31 AM

s13 Redtop
1601 Aem Ems
So I recently got everything hooked up finally. The fuel pump primes when the car is on the on position, just as it should. With the key in the ACC position, second turn of the key, I push in the brake pedal the pump primes. I hit the hazards, the pump primes. Use the turn signal, pump primes. Obviously something is definitely wrong.
The thing is I havent touched my fuel pump in like 2 years. During my build I didnt touch the fuel pump at all. The only wiring I touched was having to hook up gauges and hooking up the EMS. I did do repinning on the EMS for MAP and IAT sensors. I saw that on the EMS there is a Fuel pump relay pin but never had to touch it and never did.

I connected my old ECU and the problem did not occur. So its only happening when i hook up the EMS.
Anyone run into this problem and help me figure why my Fuel pump primes when an accessory unit is used (i.e. brake pedal, hazards, turn signal, and radio when turned on.)

09-15-2009, 01:31 AM	#1
sl87 Leaky Injector Join Date: Sep 2005 Location: san rizzo Posts: 50 Trader Rating: (1) Feedback Score: 1 reviews	Fuel pump prime and 30-1601 AEM EMS s13 Redtop 1601 Aem Ems So I recently got everything hooked up finally. The fuel pump primes when the car is on the on position, just as it should. With the key in the ACC position, second turn of the key, I push in the brake pedal the pump primes. I hit the hazards, the pump primes. Use the turn signal, pump primes. Obviously something is definitely wrong. The thing is I havent touched my fuel pump in like 2 years. During my build I didnt touch the fuel pump at all. The only wiring I touched was having to hook up gauges and hooking up the EMS. I did do repinning on the EMS for MAP and IAT sensors. I saw that on the EMS there is a Fuel pump relay pin but never had to touch it and never did. I connected my old ECU and the problem did not occur. So its only happening when i hook up the EMS. Anyone run into this problem and help me figure why my Fuel pump primes when an accessory unit is used (i.e. brake pedal, hazards, turn signal, and radio when turned on.)