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2003 nissan atimal it cranks won’t fire or not getting any fuel don’t hear fuel pump when come on.
mitchell1 you are not telling us what you have checked regarding the fuel situation. Now here is how it all works according to the SM:" The ECM activates the fuel pump for several seconds after the ignition switch is turned on to improve engine startability. If the ECM receives a engine speed signal from the crankshaft position sensor (POS) and camshaft position sensor (PHASE), it knows that the engine is rotating, and causes the pump to operate. If the engine speed signal is not received when the ignition switch is ON, the engine stalls. The ECM stops pump operation and prevents battery discharging, thereby improving safety. The ECM does not directly drive the fuel pump. It controls the ON/OFF fuel pump relay, which in turn controls the fuel pump." So what the means is that you need to check your pump, the relay after that the POS and the camshaft position sensor as well as all the wiring in between. Then if still no error found you need to check the ECM. Without sending you on a wild goose chase I recommend that you check the fuel pump fuse (see image for loaction)
Next is the fuel pump relay TEST ITEM FUEL PUMP RELAY CONDITION Ignition switch: ON (Engine stopped) Turn the fuel pump relay “ON” and “OFF” using CONSULT-II and listen to operating sound JUDGEMENT Fuel pump relay makes the operating sound. CHECK ITEM (REMEDY Harness and connectors Fuel pump relay The relay is built into IPDM E/R
There are so many people helping with their experiences and throwing parts at their cars, lets start with a real world back yard mechanic diagnosis without a scan tool and no experience. Can you run power, 12 volts to the connector back at the fuel pump (correct wire of course) and see if it will work and start the car. We will work our way back to the fuel pump relay as the computer controls the input to the relay as the computer also needs to see certain items working prior to letting the car start, you say if you spray in some form of fuel, the engine will start, this does point to a fuel related problem. Do you have a volt meter to check for power and grounds at the fuel pump connector while trying to start the car?
OK easiest answer is if you don’t hear the fuel pump prime. Then suspect bad fuse or pump. Check fuse box either in car or under bonnet (hood). If fuse is good, chance are your pump is bad. It can only be one of 3 things, fuel, air or spark! Air isn’t the issue, spark probably isn’t the issue. If it is a fuel injected car, turn key on as you would to prime it, then turn off. crack the nut on the fuel hose to the fuel rail, start undoing it, if no fuel comes out. Bad pump, if fuel dribbles out but not under pressure as it should be, bad pump. Change out pump. If fuel comes out under pressure, tighten nut. Turn ignition on, as you would to prime pump, then off again. Wait ten to 15 minutes. Then crack that nut again, should still be pressurised, if not bad pump. If pressurised, then your pump is prob on the way out or just silent. Check fuel filter, could be clogged, change it out and try to start, if starts. I’d order a new pump anyway. If doesn’t start, bad pump.
Im not sure if it is the same on the 2002 but on a 1999 there is also a ignition relay that is behind the sterio mounted to floorboard if you lay in pass side and look behind radio you can see it but is pretty hard to get to . Ground a test light and with key in on position probe the 4 pin connectors and one should make the fuel pump run if so change this relay and you should be fine . Ps… this relay controlls fire to the distributor as well as fuel pump so if it has no spark or fuel it would be my first guess.hope this helps
Alright , Ive seen this over and over and over and everyone always throws parts at the problem without knocking wtf is going on really, turn the key to the on position , is the theft light flashing? BINGO!!! IT WILL NOT GET FUEL IN THEFT MODE , WHICH IS WHY YOH GET THE CRANK BUT NO START!!! unfortunately your car either forgot the key , or the key itself took some damage either way just have it relearn the key , put it in the on position , and leave it for 15 mins or so or get a new key and have it programmed , YW
Change the crank sensor
So, my 06 Altima stalled while I was going 50mph & wouldn’t restart. Battery, fuel system, alternator & starter all worked fine & no issues with fuses or wiring. Cam & crank sensors in good condition as well… I was ready to just scrap the dang car but decided to do a Google search & voila!! It was the friggin ignition relay switch….less than $10 fix!!
with the belt off, verify that the components it turns will actually turn. If one is starting to size this could cause the engine to crank at slower speeds which may not let it start. Ac, water pump, tensioner… check them all..
First, check the battery power for its full potential power. Test, battery. If results from test say battery is:Good, then crank the engine and hold down the gas pedal. If car still does not start, visually inspect the fuses. Focus on the fuel pump areas.
Thank you for your help. I had to replace the fuel pump.
I believe it’s the fuel pressure regulator, not the pump or relay or fuse…
Thank you i will let my friend know when he comes back to work on it
I’m getting spark and no fuel. Pump and filter are good and I don’t have a key light on the dash
I have a 2003 nissan slAtima 3.5 v6 it would loose powerr even after I drive it for couple days it would start with a jump. I cleaned the mass fuel sensor and try to start it but it wouldn’t start. It wanted to but didn’t.my friend put a of try reader on it it ame back the 02 sensor. Can someone help me out on what I can do.im a women that don’t know much. Thank you
I have a 2002 Altima it will crank but wouldn’t start my husband took of the serpentine belt and it started and ran put the belt back on and back to crank but won’t start I’m puzzled by this. What is going on here?
