1993 Lexus ES 300 Repair Question
93 Lexus ES300 won't start
Do below to determine if its fuel or spark problem:
Get a helper disconnect a sparkplug wire or 2 and ground it to the engine atleast 3/16 away from ground-have helper crank engine over-do you have a snapping blue spark? If so-you have a fuel related problem, Do you hear the fuel pump come On when you turn key on? If not check fuel pump fuse and fuel pump relay if so, check the fuel pressure to rule out the fuel filter/fuel pump/pressure regulator and listen to the injector/s are they pulsing or hook up a noid light. No snapping blue spark continue to troubleshoot the ignition system-power input to the coil/coil packs,coil's resistances,cap and rotor,distributor pick-up coil, ignition control module, cam and crank sensors and computer Note: If it doesn't apply disregard it and keep testing
If both fuel and spark is present-check the valve and ignition timing, this will lead you to problems
with compression and valves opening and closing at the wrong time/broken or jumped timing
I've tried all of what you've said already and still nothing. I've had 3 mechanics to check my car already and same lead. That's why I'm here to get a 4th opinion and turns out to get the same results. Could it be anything else?
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Its cranking over and will not start-you are missing one of this in order for the engine to start- Compression, Fuel and Spark- double checked it-
Fuel's coming through from fuel line, spark is there, and compression is good. All that is there and still no start. That's why its taking me a week now to try and get this car started.
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Check if the injectors are pulsing providing fuel into the cylinders
I know this thread is late, but if you haven't solved the problem yet, check the crankshaft position sensor. The car's PCM uses it's signal to time the sparks. If there's no signal or the signal is wrong somehow, then the spark timing will be off and the car won't run. I had this same problem with a 94. After several mechanics tried replacing the fuel pump, ignitor, injectors, coils/wires, timing belt, etc etc, I stumbled on an OBDII plug hiding in the fuse box. The scanner readout showed a failed crankshaft position sensor. Replaced it, and the car has worked fine since then.
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