rough idle/bad throttle response=>ecm changing always open/closed loop!
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Registered User
Joined: Mar 2003
Posts: 43
From: Germany
rough idle/bad throttle response=>ecm changing always open/closed loop!
Hello!
A few days ago I entered the forum with the problem above:
Rough idle/bad throttle response. But the engine starts normal, cold and hot. The rough idle starts after warming up.
Now I used a scanning software and the only thing I noticed was that the engine is always changing between open and closed loop. Could this be normal?
The O2-sensors always have arround 0.5 V. I think this is ok, isn't it?
Last weekend I disconnected the O2 sensors but without any reaction to idling.
Perhaps I could send the data (From TTS Datamaster) to anyone who could handle these data better than me => You're welcome.
A few days ago I entered the forum with the problem above:
Rough idle/bad throttle response. But the engine starts normal, cold and hot. The rough idle starts after warming up.
Now I used a scanning software and the only thing I noticed was that the engine is always changing between open and closed loop. Could this be normal?
The O2-sensors always have arround 0.5 V. I think this is ok, isn't it?
Last weekend I disconnected the O2 sensors but without any reaction to idling.
Perhaps I could send the data (From TTS Datamaster) to anyone who could handle these data better than me => You're welcome.
Registered User
Joined: Aug 2001
Posts: 1,983
From: Jacksonville,fla
Hello!
A few days ago I entered the forum with the problem above:
Rough idle/bad throttle response. But the engine starts normal, cold and hot. The rough idle starts after warming up.
Now I used a scanning software and the only thing I noticed was that the engine is always changing between open and closed loop. Could this be normal?
The O2-sensors always have arround 0.5 V. I think this is ok, isn't it?
Last weekend I disconnected the O2 sensors but without any reaction to idling.
Perhaps I could send the data (From TTS Datamaster) to anyone who could handle these data better than me => You're welcome.
A few days ago I entered the forum with the problem above:
Rough idle/bad throttle response. But the engine starts normal, cold and hot. The rough idle starts after warming up.
Now I used a scanning software and the only thing I noticed was that the engine is always changing between open and closed loop. Could this be normal?
The O2-sensors always have arround 0.5 V. I think this is ok, isn't it?
Last weekend I disconnected the O2 sensors but without any reaction to idling.
Perhaps I could send the data (From TTS Datamaster) to anyone who could handle these data better than me => You're welcome.
The millivolts from the o2 sensors should be bouncing around once the car is properly warmed. If the numbers are stagnet then I would go ahead and replace them. Bad or slow o2 sensors can cause the the ecm to go from open to closed loop as described.
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