Nissan I took it to the dealer they said it was the timing chain and the fuel pump. They want about 1,800 for timing chain replacement. Is it really the timing chain or what? can it be somthig else like the heat shield i need help it sounds bad i have about 110 k on my car now.

USA car???, , I try to buy it here and none found.
what engine is there. 2.4 or 3.3?? there were 6 engines then.!!!>???
and is a smog part that is not the same on them all.

do not use sensors from wrecking yards. (in tanks)
vast kinds exists and will get wrong one or bad.
take a bath in fuel for cheap sensor , found used and bad?
really?
some sensors are 100 ohms or less other s 2500 ohms.
the never actually fail , a TERMISTER it is, crude and simple it is.
yes connections do under car filthy.
I tried to buy one here and failed for this car. how odd is that.
it is part of the EVAP system where found.
but oddly the 183 pages shows these words
it may be part of thee fuel level sender RACK./
B108 named




P0183 light (P zero) not oh.
so no service manual to learn that that means? for sure.?

• Harness or connectors
• - Fuel tank temperature sensor circuit is open or shorted.
• Fuel tank temperature sensor

FTT

DIY Video: VQ35DE Timing Chain Tensioner and Water Pump Replacement - YouTube

Nissan 3.5L timing chain update - YouTube

Timing Chain Kit Water Pump Fit 01-04 Infiniti QX4 Nissan Pathfinder 3.5 VQ35DE ' eBay

2002 QX4 overheating trouble - Nissan Forum ' Nissan Forums (nicoclub.com)

2002 infiniti q45 water pump replacement - YouTube

2001-2004 Pathfinder Infiniti QX4 both thermostats replaced - YouTube

It looks like your water pump on a 3.5L is run off the timing chain. I got some info which may help see it but may not be the exact as your car. If you are having some problems with overheating from what I saw looks like you have 2 thermostats and after changing thermostats, you can have air trapped in your engine, which will still allow engine to overheat.

i know that the previous gen quest had the fuel inertia RESET switch on the driver side kick panel...

fuel is cutting off via the ECM for your generation though

"If the engine speed is above 1,800 rpm with no load (for example, in neutral and engine speed over 1,800 rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies based on engine speed. Fuel cut will operate until the engine speed reaches 1,500 rpm, then fuel cut is cancelled."

http://www.nicoclub.com/FSM/Quest/2004_Quest/ec.pdf

EC 33

do you have trouble codes ?

Why would anyone replace those parts?

I guess the car was never tested to find any problems

No more to say

Common sense-- tells you that not all those
parts failed at one time or any at all

The used ECM needs reprogrammed for your vehicle.

Yes and no. If the oil pump is going bad the Connecting rods will knock. The Timing chain could be making the sound if the Chain guide came free. My guess is you have a 7 - 70 warranty and they are trying to get out of rebuilding your engine.

The fuel filter and regulator are located inside the fuel tank. They do not require any maintance. If the fuel pump fails, it will come as a unit including the fuel pump, regulator and fuel filter. One less service item you have to purchase.

Not necessarily. You should at least consider it if you are close to a major service milestone (90k, 120k, etc.). It is a lot of work to change the timing chain (belt), but you have to do some of the work anyway to replace the water pump.

all you need to do is just back up on the chain and it will give you the space you need to remove thw water pump you may all so need to first see is you have water in your oil if not then it not you pump can you tell what color your oil is ?

These vehicles had issues with fuel pressure bleeding down when they sit for a period of time (like overnight). Nissan has issued a Technical Service Bulletin (TSB) on this issue.

There is a check valve in the fuel pump assembly that holds fuel in the fuel line so that fuel is readily available to the engine. This valve fails and allows that fuel to slowly drain back to the tank. The reason you have to crank the engine for a long period of time is that the fuel has to be pumped from the tank all the way to the engine- may take 10 seconds or more.

Once you start the vehicle, fuel is available and since the drain back to the tank is slow, restarting after even a few hours will be much easier.

The repair involves replacing the fuel pump "module" assembly (it's a service kit that contains the check valve mentioned earlier). The fuel pump assembly is removed from the tank and disassembled and reassembled with several new parts. This is a dealer-only repair. Depending on your level of expertise, you may be able to perform the repair yourself, but will have to buy the parts from the dealer.

Nissan Scope Technician- 10+ years experience in Nissan dealership.