Rich during idling

[mechiel]

Dear all,
I'm running a 5E. Everything else in stock form, injectors, Ecu (2 sockets) and a front mount intercooler.

After I set the TPS, the engine start with no problem, idling everything in perfect and rev beautifully.

Once I stop and start the engine back, the air fuel meter showing me 7.4 (innovate) and only working fine only after 3k rpm.

May I know what may the cause?

Thanks in advance.

 

[weeJohn]

Engine starting and running problems that appear after the engine has reached normal operating temperature could be because of the engine temp sensor to the ecu. Its one of the sensors on the tree that the thermostat is fitted on.
To be 100% honest, I am not sure if this is your problem or not, but it is one of the things I would check. There is information on this site about checking the stat for normal operation.

 

[mechiel]

Engine starting and running problems that appear after the engine has reached normal operating temperature could be because of the engine temp sensor to the ecu. Its one of the sensors on the tree that the thermostat is fitted on.
To be 100% honest, I am not sure if this is your problem or not, but it is one of the things I would check. There is information on this site about checking the stat for normal operation.

Thanks mate. However the engine starts cold then start giving problem. It rich until the car miss. The spark plug is wet due to excessive petrol. It looks like the injectors are keep on spraying with minimal stoppage time.

 

[weeJohn]

Is it a 4efte ecu, is it the 4efte or 5e wiring loom?