Question about 1996 Nissan Sentra

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Wont stsrt 1996 Nissan sentra Good spark, compression,and injector pulse. Flooding out will not start

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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

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2011 nissan sentra won't start


Thank you you can start by scanning for codes, but a 02 sensor will not cause a no start condition
We will have to pinpoint what the engine is missing.

Spark

Fuel

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All three of these are tested when the engine is being cranked over. There are two way of checking for fuel. Fuel pressure and fuel trigger. Both are very important and must be present for the car to start. Fuel pressure is self explanatory. You just hook up the gage and see what the reading is. Fuel trigger is check with a noid light. The injector gets unplugged and the noid light gets plugged in to the injector clip. With the engine cranking over, this light must blink. This is the signal to the injectors from the computer. You can have all the fuel pressure in the world, but it wont matter if the injector is not pulsing gas into the cylinder like it should! Compression tester, spark tester, fuel pressure gage and noid light are all accessible at your local auto store. All three tests play a very important part in diagnosing a no start condition

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That means bad injectors, or defective fuel pump, you probably need to replace the fuel pump.

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Could be a computer problem among other things.
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Dean, it looks like your on the right path ,with all 3 things as you stated it should do something, did you try a little starting fluid , you could use a timing light to check for good steady spark . what other kind of work have you done to it ? re check your work ,when you did compression test how did the plugs look =clean =soaked in fuel = nothing at all? Woody.

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1 Answer

My 98 ford explorer wont start its turning over and getting spark and fuel


OK IF YOUR YOUR SURE YOU HAVE SPARK AND FUEL THEN THE PROBLEM IS AIR OR COMPRESSION I WOULD THINK COMPRESSION DO A QUICK COMPRESSION TEST AND I THINK YOU WILL FIND THE PROBLEM IS A BROKEN TIMING CHAIN ONE OTHER POSSIBILITY IS A PLUGGED CATALYST BUT FOR BOTH BANKS TO BE PLUGGED TO THE POINT IT WILL NOT START IS VERY RARE GOOD LUCK (WHEN YOU SAY YOU HAVE FUEL DO YOU MEAN THE FUEL PRESSURE IS GOOD AND YOU HAVE INJECTOR PULSE OR JUST THAT YOU HAVE GOOD PRESSURE THE INJECTORS MUST PULSE AND HAVE AROUND 45 TO 60 PSI (RULE OF THUMB) FOR IT TO START ) USE A NOID LIGHT TO TEST INJECTOR PULSE OR IF NOT AVILABE SUBSTIUTE A 194 BULB AND BEND THE WIRE TABS FROM THE BULB DOWN AND PLUG THEM INTO THE INJECTOR HARNESS (NOT RECOMMENDED FOR ASIAN OR EUROPEAN CARS ) THIS LIGHT WILL BLINK WHEN CRANKING OR RUNNING IF YOU HAVE INJECTOR PULSE

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1 Answer

96 nissan sentra cylinder 1 misfire


DETERMIN IF YOUR PROBLEM IS ONE OF THE FOLLOWING BEFORE CHANGING ANYTHING .1.ELECTRICAL
2.FUEL RELATED OR 3. MECHANICAL.

PERORM A COMPRESSION CHECK TO ENSURE THE COMPRESSION IS GOOD .IF THE COMPRESSION IS IN ALL CYLINDERS PROCEED TO CHECK FUEL SYSTEM .REMOVE THE FUEL INJECTORS AND EXAMIN THE INJECTOR TIP FOR CARBON DEPSITS .CHECH FUEL SPRAY PATTERN ,ENSURE INJECTORS ARE ACTUALLY SPRAYING . THEN PROCEED TO EXAMIN THA SPARK PLUGS .LOOK FOR DISCOLOURATION OF SPARK PLUG ELECTRODES OR CARBON DEPOSITS. IN DIAGNOSING PROBLEMS ONE HAS TO SYSTEMATIC OR ELSE YOU WOULD BE WASTING MONEY AND TIME PURCHASING AND REPLACING COMPONENTS WHICH ARE NOT DEFECTIVE . GOOD LUCK .

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2 Answers

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Stang: Nissan had a TSB on weak spark related to the Altima's and Sentra's. It had to do with water getting trapped in the spark plug tubes due to the steam hole vents in the plug wires becoming clogged and/on the wires no longer sealing well to the motor, thus allowing water to accumulate into the plug holes. This would cause a weak spark condition. You would still get an injector pulse as long as the ignition can be triggered.
As far as fuses: There is a box on the driver's side which contains fusible links and fuses. Unless you are checking for power with the ignition on, most of the circuits will be dead because they are switched circuits through the ignition switch. The headlights will be hot without the key on, as will the running lights,horn and brake lights.
However due to the fact that you have light spark and have injector pulse, would tell me that you have power to the ECM. If you want to check circuits, buy a cheap test light and follow the instructions. it is a simple diagnostic tool for checking for open circuits.
Hopeful I might have given you some direction. Good luck.
PS: if you replace plug wires, do so with a good quality wire. I have found that NGK wires and the Original equipment wires seem to be the best quality, lasting the longest. Life time warranty parts mean nothing if they fail at inconvenient times and with frequency. Many of these warranty's are gambles made by parts houses based on the fact that people loose their information, don't keep the cars and or just forgot they had the warranty and went out and replaced the parts again.

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2 Answers

2002 nissan sentra it wont start i got fire on the spark plugs bu


Injector pulse comes from Cam sensor, If you have a BAd CAMSHAFT sensor you will not get injector pulse, replace sensor and that should solve your problem. Good Luck and thanks for using FIX YA

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