Vehicle keeps losing power when transmission is shifted to drive?

TAPHIL

MEMBER
2007 DAIHATSU MIRA
0.6L
3 CYL
2WD
AUTOMATIC
188,000 MILES

However, when it's on P or N it stays on. We tried changing the throttle body as well as the fuel pump but to no avail. We even worked on the timing chain, but nothing changed.

Monday, August 29th, 2022 AT 9:59 PM

3 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,628 POSTS

It sounds like you have a partially clogged exhaust system, but to be sure check this guide which will help you see what's going on:

https://www.2carpros.com/articles/how-to-test-a-catalytic-converter

Are there any codes in the system?

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

Also, it could be a locked-up torque converter or TCC solenoid. Does it seem like the engine shuts off immediately or does it take a few seconds? Let me know what you find and report back please.

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Tuesday, August 30th, 2022 AT 10:55 AM

TAPHIL

MEMBER
2 POSTS

The engine shuts off once you put on drive. It will take approximately 2 seconds before shutting off. It needs to be accelerated at all times once u put on drive to keep the power. And today I have noted that it has started losing its pulling.

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Tuesday, August 30th, 2022 AT 1:04 PM

KEN L

MASTER CERTIFIED MECHANIC
47,628 POSTS

Okay, this sounds like a vacuum leak, I would check the engine using this guide, but make sure the engine is cold before you begin. Also, check the air intake boot from the throttle body to the MAF sensor or air filter.

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

This guide can help as well:

https://www.2carpros.com/articles/stall-at-idle

Please run down these guides and report back.

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Wednesday, August 31st, 2022 AT 11:30 AM