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Re: knock sensor by-pass
Only if it was that easy my friend you need to get to the plug and it deep under the intake manifold. I just did one on 1999 QX4 its alot of work. You will need intake gasket and the plenum gasket. Good Luck.
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On both cars the knock sensor is located in the intake valley.
the computer receive signals if engine knocking and adjust the timing till stop.Before replace the sensors make sure the engine have no other misfire ,bad gas or vacuum leak.plug scan tool and read the code.Only circuit problem will be a true knock problem. Inspect all wire connectors before start taking a part.
EGR working, Evap system working. A good decent cat from a newer truck would clean it up a lot. Make sure Air Pump is still there if it was originally equipt.
Make sure oil changed new air filter.
Dont run premium fuel because your engine probably does not require it and it could hurt emissions. Regular is fine.
Look at emiss sticker under hood and make sure the systems listed are operational.
Open the hood, and disconnect the battery negative cable with a wrench.
Locate the black rubber air intake tube that runs from the air cleaner box to the throttle body on top of the engine.
Loosen the clamp on the air intake tube at the throttle body with a wrench. Grasp the tube and pull it off the throttle body inlet, and move it out of the way.
Locate the knock sensor. It's bolted to the engine near the throttle body. Remove the hold-down bolt attaching the knock sensor to the engine block, using a 3/8-inch drive ratchet wrench with a 12 mm socket attached.
Follow the electrical lead of the knock sensor to its connector, and simultaneously lift the plastic tab with your hand while gently pulling apart the plug.
Remove the knock sensor from the engine bay. Compare the old sensor to your new part to ensure they are identical.
Reattach the knock sensor to the engine block by threading in the original holding bolt by hand. Snug the bolt with the ratchet wrench and 12 mm socket. Do not over-tighten the bolt.
Plug the new knock sensor into the original electrical plug.
Gently push the throttle body air intake tube onto the throttle body. Tighten the hose clamp with a wrench.
Reconnect the battery's negative terminal with a wrench. Close the hood.
Start your Subaru's engine. Take the car on a test-drive and verify that the spark knock has disappeared.
OBD Code 12 - No Distributor Reference Pulse (Diagnostic Test Active)
The Engine Control Module-ECM uses the distributor reference pulse to calculate the engine speed. On
newer engines, the Crank Shaft Position Sensor performs this function.
When flashing the Check Engine Light to read codes, code 12 will always display first, indicating the diagnostic system is active
The engine will not run with a "hard" code 12 set
Chances are you will never need to diagnose a code 12. Rather, the problem would be a crank, no-start condition.
If code 12 does not flash, that would indicate a communication problem with the ECM.
Code 12 does not show when reading codes with a scan tool. If there
is a communication problem, the scan tool will let you know.
OBD Code 46 - Pass-Key II System Error - Circuit out of Frequency Range
The ECM receives a signal from the Pass-Key module. When the correct signal is
received, the ECM will allow the engine to start and run. Please review
the RepairPal article on the GM Pass-Key Anti-theft systems for more information.
Engine may not start
Faulty ignition lock cylinder
OBD Code 43 - Knock Sensor error
The ECM receives a signal from the Knock Sensor based on the amount of engine ping detected. The ECM uses information from this sensor to help calculate fuel delivery and spark timing.
if u remove the under cover in the passenger foot well, just turn the fan blower on full and hit the first thing you see when u look under the pass foot well with the palm of your hand and the blower should start to work.
The knock sensors there are two of them.
They are under the intake in the middle of the block on the Vally pan, hard to miss them when intake is off. You need new intake gaskets when installing intake again. You should use new intake bolts but if use LOCK TITE on old bolts you should be OK.
Tighten bolts first pass to 44 lb in then a final pass of 89 lb in. ( lb in NOT lb ft
Knock sensors to 15 lb ft..
Hi! You must be frustrated by now! your code is marking that the O2 sensor is bad in bank 1. Did you replace the O2 sensor that is located before the catalytic converter? The S10 has an O2 sensor specially made for that cat. its about 30$ That would explain for your blackened spark plugs; your pc on the car is asking for more fuel. GOOD LUCK!!