Hard Starting?

2004 TOYOTA COROLLA
234,114 MILES • 4 CYL • 2WD • AUTOMATIC
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BLESSING EWOBOR
  • MEMBER
  • 753 POSTS
Hi, the vehicle is experiencing hard starting early in the morning, the vehicle has to be crank several times before it starts, whenever it starts and runs for a while, it will start properly all through that day. The following day the problem continues. The fuel pump has been replaced.
What could be the problem?
Oct 30, 2023 at 3:24 AM
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STRAILER
  • ✓Experienced Mechanic
  • 55,238 POSTS
It sounds like the throttle bore needs to be serviced or the engine coolant sensor is off when cold. Does the engine have any codes?

Here is a guide that can help:

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

Here is the location of the engine coolant sensor which you should be able to unplug when the problem is happening to see if it makes a difference. Also, I have seen defective fuel pump cause this issue as well, did the car have the exact same problem with the old pump?

Please run the codes as well.

https://www.2carpros.com/articles/checking-a-service-engine-soon-or-check-engine-light-on-or-flashing

Check out the images (below). Please let us know what happens.
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Oct 30, 2023 at 6:48 AM
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BLESSING EWOBOR
  • MEMBER
  • 753 POSTS
Thank you very much, I will do as said on the coolant temperature sensor.
Oct 30, 2023 at 1:25 PM
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STRAILER
  • ✓Experienced Mechanic
  • 55,238 POSTS
You are welcome, please let us know.
Oct 31, 2023 at 2:23 AM
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