My 2008 Infinity fx35 has a random hard start,engine will flood after 2 or 3 trieds.i will turn the ignition on and wait a minute before cranking holding the gas pedal to the floor it will start. also it will run good all day with no problems it has no codes or check engine lights on.any ideas would help thanks
Replace the cam sensor that fail the test
If I understand your post correctly, once you get the car running, you have no more problems the rest of the day? That would explain why there are no codes. The ECU typically will not react to issues. Unfortunately these are complex systems, and Nissans tend to have some gremlins (I have an 07 FX, and had owned several others).
The easiest thing to check is the battery. The system depends on accurate voltages, so test the battery under load (the standard test won't do). If it's over 3 years old, it might be the cheapest first step to replace it. Keep in mind that both the engine and the battery operate better once warmed, so this is consistent with your "all day" experience.
Also, if you have occasion to start the car then turn it off quickly (like moving it inside at night, you can have unburned gas causing hard starts. This can happen in cases where the engine is run less than five minutes from cold.
Could be pressure valves, check valves, or a number of other things. If you live in a harsh climate, you may be getting some corrosion in the electrical connectors. This can through off voltage and cause the ECU to react to incorrect conditions. If you're handy or have a patient friend who is, the repair manuals have a fairly complete diagnostic process. Also, check the Infiniti forums.
SOURCE: Car won't start and floods
Locate your vehicle's computer connector (ALDL), most are on the lower driver's side. In some vehicles you might need to look around a little, on the passenger's side, and around the center console under a plastic cover. For more information, check your owner's manual. This device gathers information that was stored in your carsECM. This information ortrouble code can inform you the system or sensor that is malfunctioning. Look up the code in our diagnostic trouble code chart. After repairs have been made use the code scanner to clear trouble codes and recheck system.
B. Testing Fuel Pressure. Test for proper fuel pressure with a fuel pressure gauge. Connect the gauge to the test port on the fuel rail. Fuel pressure reading's very depending on the system your in our vehicle, but most throttle body injection cars (TBI) are between 13 psi and 17 psi. and most (DPI) direct port injection systems are between 40 psi and 55 psi. To find out your vehicle system fuel pressure consult arepair manual. If little fuel pressure is present the fuel pump needs to be replaced.
C. Test for Weak Ignition Spark. A weak ignition system can be a sign of a failing ignition component. Remove spark plug wire and insert an extra spark plug into end of wire, attach spark plug to engine ground then crank engine. You should observe blue spark between spark plug gap. If a yellow spark is observed, your ignition coil is weak and needs to be replaced. If your spark is not consistent you may need a ignition module.
D. Inspect the Main ECM Relay. If the ECM relay fails it will shut down the engine management system. This relay carries high amperage and is prone to failure. To test install new relay then test drive to recheck symptoms.
E. Testing the Ignition Switch. This test requires a electronic test light. When vehicle dies test the power side (+) of your ignition coil with the key on, the test light should illuminate. If your test light is not lighting suspect your ignition switch or ignition relay. To trouble shoot this condition you will needwiring schematic for your car.
SOURCE: 1993 LEXUS ES300 FLOODING AND FUEL VAPOR OUT
ok, i tell you 3 possible causes.
check maf sensor connection , check fuel pressure regulator (max press fuel in rail 40 psi) , check engine compression (min 95 psi ) if less this cause spark plugs wet and not start
SOURCE: engine will turn over, but will not start
Suggestion, don;t try and start the car with the gas pedal pushed to the floor. Asking for trouble in the future.
Could be a fuel pump, clogged fuel filter.
Check engine light on? If so, Have the code read/scanned at your mechanic, or your local auto parts superstore.
SOURCE: Problem with starting our 2000 Saturn LS2: Please help!
I had the same problem with my 2000 Saturn LS2 and after replacing the fuel filter, fuel pump, ignition module, and coils I still had the same problem, I found out it was the crank sensor the whole time, after replacing the crank sensor the car is running fine and I spent all the money on the other parts for nothing. It didn't show up when put on the diagnostic machine, I am so glad that I finally found out what it was, hope this helps.
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