Knock Sensor Replacement
#16
#18
I found the part numbers here for the sensors
https://www.ebay.com/itm/2-DENSO-GEN...S/223608896472
#19
Improper fuel (octane rating) and excessive heat are prob the 2 biggest contributors but it can be caused by several things...
Causes of pre-ignition include the following:
Causes of pre-ignition include the following:
- Carbon deposits form a heat barrier and can be a contributing factor to pre-ignition. Other causes include: An overheated spark plug (too hot a heat range for the application). Glowing carbon deposits on a hot exhaust valve (which may mean the valve is running too hot because of poor seating, a weak valve spring or insufficient valve lash)
- A sharp edge in the combustion chamber or on top of a piston (rounding sharp edges with a grinder can eliminate this cause)
- Sharp edges on valves that were reground improperly (not enough margin left on the edges)
- A lean fuel mixture
- An engine that is running hotter than normal due to a cooling system problem (low coolant level, slipping fan clutch, inoperative electric cooling fan or other cooling system problem)
- Auto-ignition of engine oil droplets (Can be solved by using an oil catch tank)[3]
- Insufficient oil in the engine
- Ignition timing too far advanced
- Excessive amount of oxygen in the combustion chamber
#20
I am trying to verify the knock sensor harness for 98+ LS. Please let me know if find any. As of now I have
82219-50010 but not sure thats the right part.
Meanwhile
Lower Gaskets https://www.amayama.com/en/part/toyota/1717150020
Throttle body gasket
82219-50010 but not sure thats the right part.
Meanwhile
Lower Gaskets https://www.amayama.com/en/part/toyota/1717150020
Throttle body gasket
Last edited by Sherl; 09-19-19 at 01:10 PM.
#21
I am trying to verify the knock sensor harness for 98+ LS. Please let me know if find any. As of now I have
82219-50010 but not sure thats the right part.
Meanwhile
Lower Gaskets https://www.amayama.com/en/part/toyota/1717150020
Throttle body gasket
82219-50010 but not sure thats the right part.
Meanwhile
Lower Gaskets https://www.amayama.com/en/part/toyota/1717150020
Throttle body gasket
The best way to verify part numbers is with a dealer- https://www.mylparts.com/oem-parts/l...Y4LWdhcw%3D%3D
No need to pay dealer prices for the TB gasket-
FEL-PRO 61281
#22
It looks like the wiring harness has been discontinued.
The best way to verify part numbers is with a dealer- https://www.mylparts.com/oem-parts/l...Y4LWdhcw%3D%3D
The best way to verify part numbers is with a dealer- https://www.mylparts.com/oem-parts/l...Y4LWdhcw%3D%3D
https://lexus-usa.epc-data.com/ls400...l/2128/engine/
#23
It looks like the wiring harness has been discontinued.
The best way to verify part numbers is with a dealer- https://www.mylparts.com/oem-parts/l...Y4LWdhcw%3D%3D
No need to pay dealer prices for the TB gasket-
FEL-PRO 61281
The best way to verify part numbers is with a dealer- https://www.mylparts.com/oem-parts/l...Y4LWdhcw%3D%3D
No need to pay dealer prices for the TB gasket-
FEL-PRO 61281
#24
It looks like the wiring harness has been discontinued.
The best way to verify part numbers is with a dealer- https://www.mylparts.com/oem-parts/l...Y4LWdhcw%3D%3D
No need to pay dealer prices for the TB gasket-
FEL-PRO 61281
The best way to verify part numbers is with a dealer- https://www.mylparts.com/oem-parts/l...Y4LWdhcw%3D%3D
No need to pay dealer prices for the TB gasket-
FEL-PRO 61281
#25
#26
Guess you are right and I spoke to DriftMotion they suggested me to check for resistance between the wires before I replace. I also couldnt find the wiring harness for the sensors as from my research its that wiring harness go bad rather than the sensor itself. So, I am stranded at this point of time.
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