#2 cylinder knocking

at idle only, when,does it knock.... wow.
no car stated, sure a huge truck,, 4.57 Liters small.lol
what truck? my guess NPR huge.
is the TURBU -T 4HG1-T?????
Applications include the 2000 Isuzu NPR350A
what year.?
what country?
we know its a diesel"H"
but old ones all knock, (detonate)with mech,injectors, (for sure at idle !!!)

on a new trucks not(with common rail,? direct injection and smart EFI controls)knock ends.

see the old engine
has 9degree injector pump timing
do that? got that?
the new NPR trucks sell this same engine
with Direct injections,knock?
,my guess. a leaking injector DID. if new truck>?
direct injected, is it?
or EFI brain stuck on limphome ,mode ,scan it?

see why not staying year, is IMPOSSIBLE:
the engines in 2000 are NOT same as now,
totally different efi fuel systems.

have a compression test done and look for a moving valve seat insert
it gives the knock, misfire
as it is no 2 cylinder it is mechanical because you have moved the injectors and coils , plugs and leads and it stays at no 2 cylinder
If you want clean engine oil then change the synthetic oil out and put in diesel oil 20w40
It will not harm the engine as it is the same as petrol oil but with more additives than petrol oil
it is cheaper and has heavy detergent properties that keeps the engine internals clean
from the gunk in the sump ,it is clear that changing engine oil on a regular basis is something you don't do but if you want a reliable long lasting engine , it is must do number 1

if auto , check the flex plate at the torque converter for cracks
check ring gear for burrs
possible big end bearing
possible piston or broken ring
test by removing a plug and cranking it replace the plug and go to the next plug
repeat the process until the knock stops with that plug removed

Every what?

Hi
I would change the Knock sensor 1st eliminate the cheapest 1st
Hope this helps Nick

1. Rods connects to crankshaft and pistons.
2.Crank access is under car through oil pan removal.
3.Piston is romoved after step 2 through top of engine after cylinder head removal.
4. This is simplified explanation, you need to get head and pan gaskets, a gallon of oil, piston ring compression tool, knowledge of engine components and timing procedures etc...
5. Do you have a big garage and all required tools? What have you fixed on a car before, this is not a beginner or intermediate level fix.

Hello
The knock sensors (one for each cylinder head on the V6) are located on the inside of the cylinder heads, in order to replace them the upper intake manifold must be removed. It is always recommended on this engine family that not only replace the 2 knock sensors but that you also replace the short sub wiring harness to the knock sensors from the main engine harness as it is many times the a common cause of the knock sensor code(s) in the 1st place.

It is located on the right raer on thr cylinder head.disconnect fuel linesto the fuel pump.romove bolts that attach pump to cylinder head.romove the fuel pump.Instalation is reverse of removal.Mke sure you clean mating surfaces of old gasket material install new gasket with rtv blackk
gasket to pump side & gasket to cylinder head mating surface

Rotors are easy to replace, but I doubt that's the problem. What you need to do is jack up the car, take the wheel off, and see exactly what is scraping. It could be something simple like the splash shield touching the rotor. This is easy to bend back--10 minutes, problem solved. Sometimes, if it's on a drum brake, rust will build up on the drum to the point of scraping the back plate. Again, easy to solve by knocking the rust plates off the drum. OK?

Generic OBD II Diagnostic Trouble Codes

DTC CODES P0300 to P0399

P0300....Random/Multiple Cylinder Misfire Detected

P0301....Cylinder 1 Misfire Detected

P0302....Cylinder 2 Misfire Detected

P0303....Cylinder 3 Misfire Detected

P0304....Cylinder 4 Misfire Detected

P0305....Cylinder 5 Misfire Detected

P0306....Cylinder 6 Misfire Detected

P0307....Cylinder 7 Misfire Detected

P0308....Cylinder 8 Misfire Detected

P0309....Cylinder 9 Misfire Detected

P0310....Cylinder 10....Misfire Detected

P0311....Cylinder 11 Misfire Detected

P0312....Cylinder 12 Misfire Detected

P0313....Misfire Detected with Low Fuel

P0314....Single Cylinder Misfire (Cylinder not Specified)

P0320....Ignition/Distributor Engine Speed Input Circuit

P0321....Ignition/Distributor Engine Speed Input Circuit Range/Performance

P0322....Ignition/Distributor Engine Speed Input Circuit No Signal

P0323....Ignition/Distributor Engine Speed Input Circuit Intermittent

P0324....Knock Control System Error

P0325....Knock Sensor 1 Circuit (Bank 1 or Single Sensor)

P0326....Knock Sensor 1 Circuit Range/Performance (Bank 1 or Single Sensor)

P0327....Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor)

P0328....Knock Sensor 1 Circuit High Input (Bank 1 or Single Sensor)

P0329....Knock Sensor 1 Circuit Input Intermittent (Bank 1 or Single Sensor)

P0330....Knock Sensor 2 Circuit (Bank 2)

P0331....Knock Sensor 2 Circuit Range/Performance (Bank 2)

P0332....Knock Sensor 2 Circuit Low Input (Bank 2)

P0333....Knock Sensor 2 Circuit High Input (Bank 2)

P0334....Knock Sensor 2 Circuit Input Intermittent (Bank 2)

P0335....Crankshaft Position Sensor A Circuit

P0336....Crankshaft Position Sensor A Circuit Range/Performance

P0337....Crankshaft Position Sensor A Circuit Low Input

P0338....Crankshaft Position Sensor A Circuit High Input

P0339....Crankshaft Position Sensor A Circuit Intermittent

P0340....Camshaft Position Sensor 'A' Circuit (Bank 1 or Single Sensor)

P0341 Camshaft Position Sensor 'A' Circuit Range/Performance (Bank 1 or Single Sensor)

P0342....Camshaft Position Sensor 'A' Circuit Low Input (Bank 1 or Single Sensor)

P0343....Camshaft Position Sensor 'A' Circuit High Input (Bank 1 or Single Sensor)

P0344....Camshaft Position Sensor 'A' Circuit Intermittent (Bank 1 or Single Sensor)

P0345....Camshaft Position Sensor 'A' Circuit (Bank 2)

P0346....Camshaft Position Sensor 'A' Circuit Range/Performance (Bank 2)

P0347....Camshaft Position Sensor 'A' Circuit Low Input (Bank 2)

P0348....Camshaft Position Sensor 'A' Circuit High Input (Bank 2)

P0349....Camshaft Position Sensor 'A' Circuit Intermittent (Bank 2)

P0350....Ignition Coil Primary/Secondary Circuit