Ben Cantera

So I bought this 02 Accord Coupe 4 cyl automatic 3 days ago. Was running fine no issues. Parked it last night, this morning starter cranks but wont start.

At first it sounded like the bendix not engaging flex plate, but the crank is turning. Has spark, I even replaced plugs to be safe. Fuel pump and injectors working. I even sprayed starter fluid in the throttle body - nothing.

As its cranking, sounds like theres no compression, when I changed the plugs there was oil on each plug. But it was running fine, no smoke or anything.

Any ideas?

MAD_MIKE

You've tested air/fuel/spark.
Does the green key symbol blink or stay on when trying to start?
It should go out and stay out after the initial prove out of warning lamps.
If that does work properly then the next step is to remove the oil cap and have someone try to start the engine.
Look to see that the camshaft/rockers are moving.
If not then the belt probably broke or slipped off, which would be why the engine sounds like it is cranking with no compression.

Ben Cantera

Man got my hopes up there, but no luck. (First time I ever hoped for a broken timing belt lol) Cams are definitely turning. Gotta be a compression issue. But how could that happen overnight to all 4 cylinders?

MAD_MIKE

If the camshaft is indeed rotating, time for a compression check.

Pull the plugs and see if there is any mechanical damage or flooding going on.