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Mpi Rough Idle And Cutting Out Under Power


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#1 GeorgeWhitworth

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Posted Yesterday, 02:27 PM

Hi Everyone

My MPI started running very rough under load around a week ago. After a bit of fiddling I replaced the plugs, leads and coil pack. It now idles better but sounds rich (popping on the exhaust)

If I try to drive it it's not perfect but after a few minutes it sounds like it's running on 2 cylinders and has almost no power until it won't hold revs and cuts off.

I have had it plugged into a diagnostics and the numbers for MAF etc seem fine but the lambda sensor is not reading correctly. I replaced this a few days ago and have confirmed that all the pins are getting power.

Could it be a faulty lambda sensor causing my issues?

Thanks!

#2 GeorgeWhitworth

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Posted Yesterday, 02:29 PM

https://photos.app.g...uSg3vaaUYfsXJt6

The 02 sensor reading never changes

#3 mab01uk

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Posted Yesterday, 06:26 PM

Might be something of help in the article linked below.

 

Mini Mpi Diagnostics - Car Mechanics Magazine:-

https://www.theminif...anics-magazine/


Edited by mab01uk, Yesterday, 06:28 PM.


#4 68+86auto

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Posted Yesterday, 10:38 PM

In your photo it shows only 47 degrees so the engine isn't warmed up or it is reading incorrectly. The battery voltage is also low which could indicate a poor earth to the ECU. Until the engine is up to temperature according to the ECU, the O2 sensor being bad shouldn't matter.


Edited by 68+86auto, Yesterday, 10:40 PM.





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