Mini Equinox SPi '96 runs too rich and coughs at high speeds

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JonM - 05 Aug 2003 17:37 GMT

Hi,

1996 Mini 1275 Equinox Spi injection model <20k miles.

Its running too rich and coughs when trying to accelerate hard.
Not so noticable at low speeds.

Exhaust very black, plugs look good.

Think its a sensor somewhere possibly the air intake sensor in the air
filter housing ?

Has anyone else has this fault or can help please ?

Thanks in advance.
JonM.

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Graham - 05 Aug 2003 17:45 GMT

> 1996 Mini 1275 Equinox Spi injection model <20k miles.
>
[quoted text clipped - 7 lines]
>
> Has anyone else has this fault or can help please ?

The beauty of electronic fuel injection is that when something goes
wrong, the computer logs the fault.

You can spend a lot of time groping around in the dark for the problem
or you can look up the diagnostic procedures in the workshop manual and
get straight to the fault.

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Tim Wood - 05 Aug 2003 17:46 GMT

> Hi,
>
[quoted text clipped - 12 lines]
> Thanks in advance.
> JonM.

Sounds like you 'Laba' sensor is on the way out. It's mounted on the exhaust
manifold. The symptoms you describe would be those caused by a faulty
sensor.

Good luck.

Tim

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k - 05 Aug 2003 21:28 GMT

> > Hi,
> >
[quoted text clipped - 20 lines]
>
> Tim

Hi,
Change the air filter and then fix the leaking exhaust joint behind the
engine!

Keith

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JonM - 07 Aug 2003 08:39 GMT

> > > Hi,
> > >
[quoted text clipped - 27 lines]
>
> Keith

Hi folks,
Thanks for the info so far.
I have changed the air filter and there's no difference I'm afraid.

Last night I also changed the air intake temperature sensor in the air
filter housing, again no difference.

The garage said the emissions were totally fine, would this not
indicate the Lambda sensor is working ok ?

I was also thinking about changing the plug leads, distributer cap and
sorting the rather-noisy tappets. Im not convinced this will help as
Im fairly sure its fuel related and I dont want to go to the local
rip-off Rover dealer who will probably tell me I need a new ECU and
the problem still wont go away.

Please keep the suggestions comming and I'll keep you posted on my
progress.

How sure are you there is a leaking exhaust joint behind the engine
??????
Thanks again.
JonM

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Graham - 09 Aug 2003 07:50 GMT

> The garage said the emissions were totally fine, would this not
> indicate the Lambda sensor is working ok ?

If the emissions are fine then the mixture must be right. If it were
rich you would have very high CO.

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