Hi!
I have been a lurker for years, but a new member today. I drive a 2004.5 Kia Spectra Ex 2.0L... 144K. Have been trying to fix a rough idle for a few months now... each time I get it fixed, the symptoms return or worsen.
Presently, the idle speed jumps up and down when in drive while coasting or stopping. Will stall 50% of the time at a stop. Must throttle to re-start.
Idle speed in Neutral varies: when hot it drops below 500rpms. When cold neutral idle is high... like 2000-2300 rpms. **If I run the A/C while in Neutral or Parked the idle speed temporarily returns to normal**
Idle speed in park drops and often stalls when hot, when cold it is normal to high range.
OBD Codes P0140, P0172, P1166... Diagnostic at a local shop reccommended a tune up, replace both O2 sensors, and purge valve.
Last time I had the car repaired, EVAP canister solenoid was removed and inspected and re-installed. Afterward the kia would then idle great, but would stall once you pushed the throttle. I was told to replace PCM.
Instead I took it to another tech, who inspected electrical system and sensors. He got the kia going again: no error codes, no issues afterward for about 2 months.
Now the problem is back with a bite. Stalls more often, harder to start when hot, and loss of overall power. Recently tested battery, alternator, and starter... all fine. Replaced the battery terminal connections with brass fittings. B12 Chemtool fuel treatment.
Before proceeding, can any of you veterans offer some tidbits of wisdom regarding this issue? The repair estimates are stacking up to over half the value of my vehicle. Ouch.
I have been a lurker for years, but a new member today. I drive a 2004.5 Kia Spectra Ex 2.0L... 144K. Have been trying to fix a rough idle for a few months now... each time I get it fixed, the symptoms return or worsen.
Presently, the idle speed jumps up and down when in drive while coasting or stopping. Will stall 50% of the time at a stop. Must throttle to re-start.
Idle speed in Neutral varies: when hot it drops below 500rpms. When cold neutral idle is high... like 2000-2300 rpms. **If I run the A/C while in Neutral or Parked the idle speed temporarily returns to normal**
Idle speed in park drops and often stalls when hot, when cold it is normal to high range.
OBD Codes P0140, P0172, P1166... Diagnostic at a local shop reccommended a tune up, replace both O2 sensors, and purge valve.
Last time I had the car repaired, EVAP canister solenoid was removed and inspected and re-installed. Afterward the kia would then idle great, but would stall once you pushed the throttle. I was told to replace PCM.
Instead I took it to another tech, who inspected electrical system and sensors. He got the kia going again: no error codes, no issues afterward for about 2 months.
Now the problem is back with a bite. Stalls more often, harder to start when hot, and loss of overall power. Recently tested battery, alternator, and starter... all fine. Replaced the battery terminal connections with brass fittings. B12 Chemtool fuel treatment.
Before proceeding, can any of you veterans offer some tidbits of wisdom regarding this issue? The repair estimates are stacking up to over half the value of my vehicle. Ouch.