Misfiring when cold after installing a new alternator?

2005 DAIHATSU TERIOS
100,000 MILES • 1.3L • 4 CYL • 2WD • AUTOMATIC
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MURPHY963
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I installed a new alternator after the bearings went bad. The car worked fine. The next day when the car was cold, it lacked power until it was running at normal temperature again. During normal temperatures the car does not misfire, but it does when cold. What could be the problem?

Thanks
Aug 10, 2023 at 12:07 PM
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JACOBANDNICKOLAS
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  • 110,175 POSTS
Hi,

Please understand, this vehicle isn't offered in the US, so I don't have the specifics or manuals. However, I will try my best to help.

Have you checked for engine vacuum leaks? That can cause a rough idle and stalling.

Here is a link that explains how to check:

https://www.2carpros.com/articles/how-to-use-an-engine-vacuum-gauge

Also, take a look at this link. You may find it helpful.

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

Let me know.

Joe
Aug 10, 2023 at 8:36 PM
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MURPHY963
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The car does rev but there is no power to climb the garage ramp, then when it heats up it works fine.
Aug 10, 2023 at 8:56 PM
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JACOBANDNICKOLAS
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  • 110,175 POSTS
Hi,

By chance, did you check the engine coolant temperature sensor to see if it was disconnected?

Joe

Aug 11, 2023 at 9:16 PM