Vehicle is not idling nor accelerating right

BOBBYB69

MEMBER
2005 KIA RIO
1.6L
4 CYL
2WD
AUTOMATIC
143,500 MILES

Now my daughter's car is not idling nor accelerating right. How do I test the TPS and is the idle air control valve be part of the problem? As always many thanks. The car had a fouled plug so we tuned it up went for a drive and it bogged down terribly again. Then we stopped, turned the key off, and 10 seconds later restarted it and it ran fine. Is that a sticking air idle valve or TPS? I tried pumping the gas but nothing changed until we restarted. Thanks Y'all. :)

3 Replies

KASEKENNY

MECHANIC
18,907 POSTS

Hi,

First, you cannot clean this type of TPS because it is a variable resistor which means as the shaft moves, it changes the voltage signal to the ECM. However, you can clean the throttle bore which very well could be the issue.

Here is a guide that will explain that a little more:

https://www.2carpros.com/articles/throttle-actuator-service

As for the idle air control valve, you can clean that and here is a guide that will explain that:

https://www.2carpros.com/articles/idle-air-control-valve-service

Let's do these two things and then go from there because I think you are on the right path.

Here is a guide that explains low power causes so let's go through this as well. Thanks

https://www.2carpros.com/articles/engine-has-low-power-output

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