Hi and thanks for using 2CarPros.com.
A hard start can be the result of a few things. The first thing I would like for you to do is read through this link. It discusses hard starting, common causes, and how to repair.
https://www.2carpros.com/articles/engine-cranks-excessively-before-starting
Now with that in mind, I have a concern. You said when cranking to start, sometimes it seems like it turns too fast. If that is the case, it could be the result of low engine compression (which will cause a hard start) or engine timing which can do the same. What I would like for you to try is checking engine compression. Here is a link which discusses doing the process:
https://www.2carpros.com/articles/how-to-test-engine-compression
Here are the directions specific to your vehicle from Alldata. Picture 1 correlates with these directions. You will need a compression gauge, but most parts stores will lend you one.
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INSPECT COMPRESSION
Warm up and stop engine.
Remove ignition coil.
Remove spark plugs.
Inspect cylinder compression pressure.
SST 09992-00500
Insert a compression gauge into the spark plug hole.
Fully open the throttle.
While cranking the engine, measure the compression pressure.
Compression pressure: 1,300 kPa (13.3 kgf/cm2, 189 psi)
Minimum pressure: 1,000 kPa (10.2 kgf/cm2, 145 psi)
Difference between each cylinder: 100 kPa (1.0 kgf/cm2, 15 psi)
NOTICE:
- Always use a fully charged battery to obtain engine speed of 250 rpm or more.
- Check other cylinder's compression pressure in the same way.
- This measurement must be done in as short a time as possible.
If the cylinder compression in one more cylinders is low, pour a small amount of engine oil into the cylinder through the spark plug hole and repeat steps (1) through (3) for cylinders with low compression.
HINT:
- If adding oil helps the compression, it is likely that the piston rings and/or cylinder bore are worn or damaged.
- If pressure stays low, a valve may be sticking or seating is improper, or there may be leakage from the gasket.
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Lets start with that. Let me know what you find or if you need help with anything. I hope you find this information helpful.
Take care,
Joe
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Friday, October 16th, 2020 AT 10:02 AM
(Merged)