Erratic idle and hard shifting?

Tiny
BEAN SOUP
  • MEMBER
  • 2007 HONDA ACCORD
  • 2.4L
  • 4 CYL
  • 120,000 MILES
After changing the starter and the knock sensor out of the blue the car's idle goes up and down from 1,500 RPMs to over 200 RPMs. When I shift it sounds like the transmission is falling out the only thing, I saw was I tore 3 wires out of the throttle body harness connector. 6 pin. Bought a new connector and rewired it but no help. I've been chasing wrong codes since then and changed 02 sensor. Petal sensor. TPS sensor plugs and coil pack?
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Monday, January 23rd, 2023 AT 3:11 PM

3 Replies

Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

Did you have the intake removed to access the starter? If so, and I believe it's required, my first suspect is you created a vacuum leak at some point, or the manifold is leaking.

By chance, do you have a live data scan tool? If you do, let me know what the short-term fuel trims are once the engine reaches operating temperature.

If you don't, check all vacuum hoses and if the intake is leaking.

Here is a link that explains how it's done:

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

Let me know. Also, let me know what codes are present.

Take care,

joe
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Tuesday, January 24th, 2023 AT 2:21 PM
Tiny
BEAN SOUP
  • MEMBER
Thanks for your input. The code reader that's been throwing almost different codes every time I use said today po223. That takes me back to the throttle body actuator motor harness connector that I replaced. But I must have put the pins in wrong or didn't splice it right. Anyway, I ordered on eBay a used connector for that car with the correct wire colors as mine. With a pig tail I'll splice that on and not have to mess with the pins or anything. I'll know in about 5 days when it gets here.
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Tuesday, January 24th, 2023 AT 4:43 PM
Tiny
JACOBANDNICKOLAS
  • EXPERT
Hi,

Thanks for the update. Actually, that is a good idea. As long as it is the same as what you have, it should go together easily for you.

If you have questions or if I can help in any way, let me know. Also, if you can, let me know if this takes care of the problems.

Take care,

Joe
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Wednesday, January 25th, 2023 AT 6:22 PM

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