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1997 Nissan Sentra 4 cyl Flooding

My daughter parked the Sentra last night, then went to start it this morning and it won't start. I pulled the plugs, and all four cylinders are full of fuel. Dried it out, and replaced the plugs, tried starting it, and the same thing. Floods out badly, and right away. Any ideas?

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  • Scott Donaldson Feb 22, 2009

    I have the same problem on my 98 sentra. If I pull the fuse on the fuel pump when cranking it will start-have to be quick to push it back in!



    I found that disconnecting the temp sensor by the fuel input line located just before the ionjectors, on the top left of the engine will also let me start it-replacing sensor was not the fix.



    Still looking for an answer for over a month now Feb 21, 2009

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5 Suggested Answers

  • 1861 Answers

SOURCE: 1997 Nissan Sentra 4 cyl. Won't Start

You do not have a fuel pump, fuel pressure regulator, or other fuel-related issue.
What you have, in fact, is an issue with the fuel injectors. All 4 injectors get constant power, and the ECU provides a pulsed ground circuit (in milliseconds) to energize the injector (the ground completes the circuit, pulls the electromagnet open to let the fuel spray). If the ground circuit is constant, as in your case, you will have the injectors spraying all of the time, as you have described seeing fuel on the tops of the pistons. This can only be caused by these 2 factors: either you have a chafed injector ground wire shorting that wire to a ground on the engine, or a bad ECU.

Posted on Oct 18, 2008

  • 84 Answers

SOURCE: wont stsrt

sounds very much like the coolant temp sensor
, this tells the pcm that the engine is cold, sometimes they fail and tell the pcm the car is at -40 degrees, the pcm then tries to compensate by keeping the injectors open for too long flooding the engine. the part is inexpensive, and normally easy to replace. It can be checked with a scan tool, or a volt/ohms tester,

Posted on Dec 22, 2008

  • 59 Answers

SOURCE: Nissan Sentra 2001 2.0/SE Disk Brakes

you cant they are self adjusting the only thing you can do is bleed them and see if that helps

Posted on Jan 04, 2009

motor1258
  • 6674 Answers

SOURCE: severely flooding out

Stop at autozone or pepboys & have free trouble code scan done & go from there. Get back to us if need help.

Posted on May 05, 2009

  • 27 Answers

SOURCE: my nissan sentra floods too easy why?

if its flooding its your fuel pressure regulator

Posted on Jul 10, 2009

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