dumbledore
Member
- Joined
- Jul 4, 2010
- Messages
- 745
- Points
- 144
I am trying to solve a high idle condition again.
The symptoms are that the idle sits around 1200k fairly constant but fails to get down. I did some emission measurements with some diy meter and emission were high. I checked lamda sensor and that looked dead so I changed two weeks ago. The emissions went low but the idle did not get down. So today I had another look. Checked the operation of the idle stepper motor and that is OK, also checked the coolant sensor and that is also OK. Rechecked to lamda and that is also OK, there is volage there around 0.9V flactuating. This indicates the engine is running rich at idle, and yes my diy gas analysed confirms CO around 4-5%, which is too much.
My suspicion is that the SPI injector may need replacement as my symptoms suggests that idle mixture is too rich. The ECU may be compensating by keeping the idle speed high to keep CO at lower levels.
Do you think the SPI injector failure is sound?
Anybody tried to to replace the SPI injector here? Can the SPI injector be serviced? I know MPI injectors can.
Can the injector be bought without buying the whole throttle body?
The symptoms are that the idle sits around 1200k fairly constant but fails to get down. I did some emission measurements with some diy meter and emission were high. I checked lamda sensor and that looked dead so I changed two weeks ago. The emissions went low but the idle did not get down. So today I had another look. Checked the operation of the idle stepper motor and that is OK, also checked the coolant sensor and that is also OK. Rechecked to lamda and that is also OK, there is volage there around 0.9V flactuating. This indicates the engine is running rich at idle, and yes my diy gas analysed confirms CO around 4-5%, which is too much.
My suspicion is that the SPI injector may need replacement as my symptoms suggests that idle mixture is too rich. The ECU may be compensating by keeping the idle speed high to keep CO at lower levels.
Do you think the SPI injector failure is sound?
Anybody tried to to replace the SPI injector here? Can the SPI injector be serviced? I know MPI injectors can.
Can the injector be bought without buying the whole throttle body?