Hard starting

2003 TOYOTA CELICA
165,000 MILES • 2.1L • 4 CYL • 2WD • AUTOMATIC
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RICHARD JOHNSON2
  • MEMBER
  • 1 POST
I have replaced injectors, coils, fuel pump spark plugs, etc.
Jun 28, 2020 at 2:31 PM
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.
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KASEKENNY
  • AUTOMOTIVE REPAIR CONTRIBUTOR
  • 18,907 POSTS
So we need to find out which system is causing the not starting. An engine needs three things to start, fuel, spark, and compression. So this is just a matter of finding out which one is causing this issue. That is done by eliminating each one, one at a time.

Start with fuel. To eliminate this, take starter fluid and spray it in the intake and see if the engine starts. If not, remove a spark plug and hold it against the block and see if there is ignition. Lastly we need to check compression.

Here is a guide on hard starting:

https://www.2carpros.com/articles/engine-cranks-excessively-before-starting

Here is a guide on how to do a compression test:

https://www.2carpros.com/articles/how-to-test-engine-compression

Let us know what you find. Thanks
Jun 28, 2020 at 7:44 PM
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