Nissan 370Z Forum - View Single Post - Rough Start

Gearhead51 · 10-22-2011, 10:21 AM

This was the first thread that led me to this board. My girlfriend's 370 exhibits this behavior. I'm thinking dribbling fuel injectors. If you floor the accelerator while starting (kills the injectors to clear a flooding issue) the car will actually crank and run for about 1 second on residual fuel in the cylinder. If you continue to hold the accelerator on recrank, you get nothing the second time around. It just spins. If on the third crank, you release the accelerator, the engine cranks as if it were cold.

Obviously, this is not how you want to start your car every time, but it js quite useful for diagnostic reasons. I've done this 3 times in the last 2 days, so I'm still diagnosing. The 1-2 hour window between attempts makes this a long diagnostic cycle.

10-22-2011, 10:21 AM	#66 (permalink)
Gearhead51 Base Member Join Date: Jul 2011 Location: Gainesville, GA Posts: 17 Drives: Which one? Rep Power: 14	This was the first thread that led me to this board. My girlfriend's 370 exhibits this behavior. I'm thinking dribbling fuel injectors. If you floor the accelerator while starting (kills the injectors to clear a flooding issue) the car will actually crank and run for about 1 second on residual fuel in the cylinder. If you continue to hold the accelerator on recrank, you get nothing the second time around. It just spins. If on the third crank, you release the accelerator, the engine cranks as if it were cold. Obviously, this is not how you want to start your car every time, but it js quite useful for diagnostic reasons. I've done this 3 times in the last 2 days, so I'm still diagnosing. The 1-2 hour window between attempts makes this a long diagnostic cycle. __________________ His: '94 RX7 Gotham Racing Street Port 3mm seals, Power FC, GR67 single (T04R), twin Tials dumping behind front tire, Tein coilovers w/ EDFC shocks, etc... Hers: '09 370Z Touring, 7AT, all stock (for now)... '04 Silverado Z71 for sale.