losing fuel pressure on acceleration. lean at wot - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

derass · 04-03-2016, 11:13 PM

In some cases, the fuel pump not delivering enough volume could explain what you're describing. However, I don't think that's the case for you at only 10 psi. If it was 20, than maybe.

You should verify that you are actually loosing fuel pressure. Tape a pressure gauge to the wiper blade and go for a drive.

My car would keep reading lean and I couldn't figure out why. Ended up being a faulty 02 sensor. You can try this test: https://www.youtube.com/watch?v=onbjzEOZtMs

04-03-2016, 11:13 PM	#4
derass Zilvia FREAK! Join Date: Jun 2010 Location: Toronto, ON Age: 37 Posts: 1,182 Trader Rating: (0) Feedback Score: 0 reviews	In some cases, the fuel pump not delivering enough volume could explain what you're describing. However, I don't think that's the case for you at only 10 psi. If it was 20, than maybe. You should verify that you are actually loosing fuel pressure. Tape a pressure gauge to the wiper blade and go for a drive. My car would keep reading lean and I couldn't figure out why. Ended up being a faulty 02 sensor. You can try this test: https://www.youtube.com/watch?v=onbjzEOZtMs