sims76

Another good resource...I printed this out when changing heads, helped tremendously. http://www.geocities.com/inlinestroker/

I run the stock NA fuel injectors on my 76 280Z. I also run standalone fuel (Megasquirt) and have a wideband O2... At 6500RPM, my injector duty cycle is 75% with a healthy 12.8:1 air/fuel ratio. Conclusion: you probably don't need bigger inectors unless you have forced induction. (I have a large cam, headers, intake, MSA exhaust and I still don't need larger than stock injectors) -Sims

1. Get your multimeter ready (if you don't have one, buy one) 2. Get a helper 2a. Remove the cover on your air flow meter. It's located a few inches from your throttle body. 3. Set the multimeter to read volts and place the leads on the terminals of the fuel pump. The fuel pump is located at the rear passenger side of the car near the gas tank. 4. Have the helper turn the key to the "on" position. Do not start. 5. Read the voltage at the fuel pump terminals. It should be zero. 6. Have the helper turn the wheel in the AFM clockwise. 7. You should now hear the pump running and read somewhere around 12V. Conclusions: 12V but pump not running - the pump is dead 12V and pump is running - everything is working, this is not your problem No 12V - Electrical problem