Trouble shooting 97 Toyota camry

These numbers are OBD codes. They are misfire coding.
There is a youtube video to assist with troubleshooting.
Trouble shooting misfire Code P0300 P0301 P0302 P0303 P0304 P0305 P0306...

Good luck.
Semper Fi,
Z

The fault codes refer to misfires, P0300 is a random misfire ,anything from fuel injector problems , vacuum leaks , low fuel pressure ,clogged fuel filter . P0302 is a specific cylinder misfire same for P0303 ! # 2 an #3 cylinders . Spark plugs , plug wires , coils or coil , depending on make model an year vehicle an ignition system type ! Testing is the only way to find out the corrections needed . It takes a very good technician to trouble shoot these problems . Your best bet would be to take your vehicle to a qualified repair shop

Do tune up,coils module,wires,plugs and see what happened..

If a tune up (spark plugs, ignition wires, distributor cap/rotor button or coil packs) don't work, try checking the fuel system.

All cyls misfiring. 97 honda. How many miles?Sounds like plug wires or a wet distributor cap. Yet if it is a Vtec The misfires could be occurring after the cams engage. Possible VTEC solenoid issue.

We can't help you here

You need the car diagnosed

I doubt you have lifters,should have
OHC valve train

Most likely the oil passages are clogged up
in the cams with sludge

That's what happens when the wrong oil
& too long between changes takes place

You ruin the engine

PO171 OBD2 Code basically this means that an oxygen sensor in bank 1 has detected a lean condition (too much oxygen in the exhaust). On V6/V8/V10 engines, Bank 1 is the side of the engine that has cylinder #1. The P0171 is one of the more common trouble codes.

his code is triggered by the first downstream (front) O2 sensor. The sensor provides a reading of the air:fuel ratio leaving the engine's cylinders, and the vehicles powertrain/engine control module (PCM/ECM) uses that reading and adjusts to keep the engine running at that optimum ratio of 14.7:1. If something is not right and the PCM cannot maintain the 14.7:1 ratio, but rather there is too much air, it triggers this code.

The trouble Area for these codes are:

Ignition failure sensor circuit problem. Either a bad sensor or connection.

Sounds like you still have air leak.