2002 Nissan Altima - Answered Questions & Fixed issues

There could be several reasons why your 2002 Altima won't start even though the engine is turning over. Here are some common causes to consider:

1. Fuel system issues: If the fuel pump, fuel filter, or fuel injectors are not functioning properly, then the engine may not be getting enough fuel to start. You can check the fuel pressure and fuel pump relay to see if they are the issue.
2. Ignition system problems: If the spark plugs, ignition coil, or ignition module are not working correctly, then the engine may not be getting the spark it needs to start. You can check the spark plugs and ignition coil to see if they need to be replaced.
3. Battery issues: If the battery is dead or not providing enough power to start the engine, then the engine may not start. Check the battery voltage and connections to make sure they are in good condition.
4. Starter problems: If the starter motor is not working correctly, then the engine may not start. You can check the starter relay and wiring to see if they are the problem.
5. Mechanical issues: If there are any problems with the engine's timing, compression, or other mechanical issues, then the engine may not start. This would require a more in-depth diagnosis by a mechanic.

It's best to have a professional mechanic inspect your car to determine the root cause of the problem and make any necessary repairs.

You need a body control computer, which controls the windows, door locks and other items. The new computer will have to be programed by a good imports shop or Nissan dealer.

I also have a 2009 Nissan Altima and after sitting or driving in the rain the entire back floorboards are soaked. I took it in last year and supposedly they replaced a "plug". Unfortunately the repair was done at the end of the rainy season so everything seemed to be okay. Fast forward to this seasons first real rain and again soaked floorboards. I went back to the dealership very frustrated with the whole situation. This time they had had my car for 4days and I was told that the HVAC box was leaking due to a clogged line. The line was cleared and sealants used on certain areas. The service advisor is confident that this will take care of my problem. I'm not so confident since my HVAC system was not in use when the car was just sitting there filling up with water. Wish me luck. I am curious how many 2009 Altima's are having this problem and if Nissan is just trying to avoid some sort of recall notification. Very dissapointed 1st time Nissan owner.

Question edited for clarity and maker. Question moved to Nissan Altima. Clean Throttle Body and Mass Air flow Sensor (MAF). Check oil level and top up to the upper line. https://www.google.com/search?q=2002+nissan+altima+clean+throttle+body ..

get tranny serviced

Unfortunately we need to know what type of vehicle you’re referring to. I would be glad to assist you.

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Bose wiring diagram ' The Nissan Club

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I have a 2003 nissan altima and the door has woked fine all night and now the door will not open from the inside. It is just a broken spring?

You can find the reset procedure here https://resetoillight.com/category/nissan/Altima/

You have to check battery terminal for looseness, also you have to clean them carefully to remove any dust of carbon buildup

I DONT THINK ITS YOUR CAT OR ELSE YOU WOULD OF DEFINITELY RECEIVED A CHECK ENGINE LIGHT CODE. MIGHT JUST BE SOMETHING ON YOUR SUSPENSION SYSTEM.

Things to check
Plugs;
Remove the spark plugs and read them, they should all have a dry tip and be clean from any carbon, oil or fuel.
Usually if burning fuel properly they will have a brown or whitish looking tint from burned carbon.

If any of the plugs look wet or black or dirty looking different from the others the problem is with that cylinder, change all the plugs and see if that helps, the next lease expensive thing is replacing the plug wires.If your fouling plugs ask your parts store for 1 number hotter plug ( heat range)

Plug Wires;
Open the hood at night with the engine running and see if you find any blue looking arcing around or in the wires, if so replace the wires.

Fuel Injectors
If all above looks good your fuel injectors might be dirty or one might not be working. You could try an injector cleaner mixed in with your gas

A rough idle comes from one or more cylinders not firing as hard as the others or not at all, there are so many causes for this so you have to troubleshoot with the lease expensive fix first.

Another thing is water in the gas, you can pour plain ole rubbing alcohol in your gas tank if you suspect water in your gas. alcohol mixes with the water and makes it burn instead of mis firing.

Valves
One more thing that can cause rough idle is your valves, this requires a compression check on each cylinder. If one cylinder has less compression than the rest remove the compression tester and squirt some engine oil in the cylinder then re test, if the compression increases it is bad rings or a bad cylinder bore, if not it is a valve problem.

Oil seals around the piston increasing the compression temporarily while testing but makes no difference in testing if the valves are leaking.

Good Luck,... troubleshooting and patience, or a good mechanic is the solution if you are working with neither

behind left side of dash

I installed a qr20in a honda stream an need to connect the electronic excelarator pedal wires to the ecu

Use Nissan Altima Automatic Transmission Fluid and it should hold about 10 quarts total. I would fill with 9 quarts and start the engine and circulate the fluid. Check the fluid level and add what you need.

You might want to try and reverse flush the heater matrix. This is the small radiator within the heater. To do this find the two hoses that lead away from the engine compartment to the bulkhead of the car. Undo them both from whatever joints you can find, you will get some coolant loss. Get a garden hose and turn on the water and allow the water to push through the matrix. Do this in both directions ie into both of the loose hoses then reconnect the original hoses top up the coolant, Don't forget to add antifreeze and hopefully a working heater.

no. typically the whole engine is lowered out with the trans attached then separated.

Ignore me if I am wrong, but I believe the timing is ECU defined and non-adjustable. To confirm, it has a crank position sensor.

I know of no reason why you shouldn't do that and I have seen cars with a loose ribbon cable in the boot...

What year?