Question about 2006 Nissan Sentra
I have the same problem, I used a fuel pressure testing kit to figure out why it does this. Here is what I found.
1) Fuel pressure drops when the vehicle is turned off, this *might* be normal because I do not see a return line for the fuel rail.
2) My vehicle is a standard, so it will not start without pushing the clutch in. If I try to crank the engine without holding the clutch, the fuel pump *should* activate. However when I attached the testing kit, the fuel pump did not activate until I cranked the engine a few times. After that, the fuel pump activated EVERY time without the clutch pushed in with a constant 51psi of fuel pressure.
Something tells me a sensor, possibly the fuel pump regulator is bad. it could also be a air leak at the injector or fuel rail somewhere, if that is the case it would explain the drop in fuel pressure as soon as the vehicle is turned off.
Fuel pump has defective check valve check fuel pump m and fuef tank and replace.
Posted on Jun 29, 2009
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Posted on Jan 02, 2017
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