1993 Lexus Ls 400 "bad knock sensor engine surge" Questions

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Knock sensor wires checked good. I HAD THE SAME PROBLEM WITH MY CAR. 93 LS 400. THAT WOULD BE YOUR FUEL FILTER OR THE FUEL PUMP GOING BAD. TRY CHANGING THE FILTER FIRST. THE DEALER TRIED TO CHARGE ME

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...engine went back to normal idle. Sounds like a faulty Throttle position sensor. Warranty should pay for parts & damage, talk to your dealer. The 88 -90 ford tempos had same problem & a driving school ...

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Question about Lexus LS 400

1 Answer

...Surging idle is often a sign of a vacuum leak and can cause random misfires. Vacuum leak would also cause hesitation. Sensor heater can be a fuse, wiring or bad sensor. What's the window

Question about Lexus LS 400

1 Answer

...bad when i try to give it gas this trouble code means your system is running to lean on bank 2, Basically this means that an oxygen sensor in bank 2 detected a lean condition (too much oxygen in the ...

Question about Lexus LS 400

1 Answer

...caused by a faulty IAT sensor due to loose connections, bad grounds, high resistance in the circuit, or opens in the circuit. Extended crank time when the engine is cold Poor fuel economy Spark ...

...bad so i replaced it, the second was a knock sensor, tested it it was just loose, 3rd is a maf sensor/circuit, checked it everything was fine, 4th is the IACV/AAC valve. The engine also surges when ...

...sure you time it correctly. However a bad Mass Airflow sensor would cause the RPMs to go crazy. But the pinging  is most likely the valve tapping the piston and needs immediate attention as

...knock), and/or a hesitation/surge on acceleration. If need additional details, just contact us. Hope this helps. p0174- is system to lean ( bank 2 )---po154- is 02 sensor curcuit no activity ( bank 2 ...

Question about Lexus LS 400

2 Answers

...bad fuel mileage, about 8 mpg no matter what speed I am going. I took the throttle body off last summer and change the sensor in the body and the one on the side of the motor. I also cleaned the ...

Question about Lexus LS 400

4 Answers

...bad PCV valve or a loose vacuum hose or a hose has come off. You can also take some carburetor cleaner and spray around the intake manifold and see if the RPM's change at all. Of course do this ...

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