99 tacoma turns over won't start

What was checked/tested ?

Fuel pressure at motor & spark cranking?

Battery seems fine based on what kind of testing?

Won't Start
Won't Turn Over

Have to get your thoughts around what you say

Won't start or won't crank ? ?
If it won't crank you might have an engine problem such as a broken timing belt.

Check your battery connections on the battery and the other ends where they go the ground will go to the engine block and the positive to a solenoid make sure all of this is tight and has no corrosion. This is just a loose wiring problem

You'll have to figure out if it is a fuel or ignition problem to proceed.
Check for spark at the plugs, and fuel pressure at the injectors.
You might want to check the computer for trouble codes too.

Check battery.

If the engine is turning over strong but not starting, the starter is fine, but if it's clicking, the starter solenoid on the starter may be defective, Try tightening the battery cables, the lights can still work even though you don't have a good connection to start the engine.

sounds like you have a bendix and ring gear problem, sounds like you have a starter bendix engagement and disengagement problem, drop starter and inspect the flywheel ring gear and starter drive gear (Bendix) .

Look for worn teeth on the flywheel it only will happen in one or two spots 180 degrees apart cause the motor always will stop in one two places... seen it a 1000 times...

your main power wire is shorting out against the exsault manifold

solenoids are worn out, it will probably eventually start after 4 or 5 clicks but its annoying as hell

I just copy/pasted this from another message with much the same problem:


freetek
Rank: Wiz
Rating: 83%, 220 votes
I don't know if your truck uses this method but several vehicles I have owned would turn on the electric cooling fan to combat the natural temperature rise that occurs in the engine once the coolant is not circulating anymore.
This prevents hard starting in a hot engine and if the thermostatic switch fails that controls the fan, the cooling (and turn-on) doesn't happen.
This may be your problem.