Just purchase an Ascend

me2kimi

500 RPM
Senior Member
Jun 25, 2007
717
276
1,563
Puchong
Hi all forumers. Recently I have bought an Ascend 1.6 auto. It quite a good car. Everything is in good condition except it has a rough idle. I found O2 sensor already malfunction and disable it.
But still idle is not satisfaction.
 

4gbanger

1,500 RPM
Jun 26, 2013
1,958
386
683
Johor/ShahAlam
i admire this car.. better check the throttle body. might be idle control valve gone. or maybe the hose u need to connect back. u cant disable the 02 sensor as the ECU might not reading well.
 

me2kimi

500 RPM
Senior Member
Thread starter
Jun 25, 2007
717
276
1,563
Puchong
i admire this car.. better check the throttle body. might be idle control valve gone. or maybe the hose u need to connect back. u cant disable the 02 sensor as the ECU might not reading well.
yup, most likely the idle valve not in good condition. Yes, I'm aware that ECU need feedback from O2 sensor. I bypass the O2 sensor temporarily before get a replacement. If I connect the O2 sensor, the idle is very bad. Sometime the engine stall.
 

me2kimi

500 RPM
Senior Member
Thread starter
Jun 25, 2007
717
276
1,563
Puchong
I'm not sure it is deto engine or not. Coz i dont know how to differentiate between ori ascend engine with deto engine.
But it has dark grey rocker cover

Sent from my Galaxy Nexus
 

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