11 replies to this topic

[harritz3257]

Hello,

 

So lately my MPI's (1997) idle has started to sound weird.. Its like its misfiring..

 

My "Mini Tech Level" was quite low at this point, so i just replaced the spark plugs and thought the previous owner had not changed them..

 

2 months later and im having the same problem. Today i pulled the park plugs and here's the weird thing.. Cylinder 1 and 4 is all black, but cylinder 2 and 3 are the correct color.

 

Whats bugging me, is that the injector for cylinder 1 and 2 is the same, so how come the spark plugs aren't the same??

 

Hopefully im not the first one to have this problem.

 

Regards Michael

[cian]

Normally it's the other way round lol

[harritz3257]

I know :)

 

I've borrowed a cleaning machine that cleans the intake (car needs to be turned on in idle for 2 hours, while the machine sprays something into the air intake).

Hopefully this will fix the problem..

 

/Michael

[Minimpi44310]

Hi,

is your problem fix?

My mini MPI 1999 same problem

I changed the TDC Sensor and now it's good.

You can try to clean the sensor, (filing snap*, black dust*) this is free free !

Regards

Claude

 

* limaille et * suie

[harritz3257]

HI Claude,

 

Im affraid not.. well i've bought and fittet a new cylinder head, but i havnt had the chance to fire it up yet.

 

Got a link for the TDC sensor? and maby a picture. (I have no ideer where to find it   )

 

Regards Michael

[FlyingScot]

It's above the starter on lhs (as you look under bonnet) with a blue connector.

FS

[Fast Ivan]

sounds like it could be weak spark, check the leads, the spark plug gaps and the coil pack, check your valve clearances as well

[harritz3257]

Thanks FlyingScot & Fast Ivan, i'll give it all a try.!

[thelittlecarcompany]

Did you find a cure to your problem? Is it running rough or just on idle? I think I might have the same problem!

[harritz3257]

Sorry about the late reply.

 

Its still in storage, but i'll give it a look in a few weeks when the snow is gone.

 

Please do update the topic, if you find a solution.

 

My symptoms are rough idle and sometimes a cylinder isnt fyring as it should. When i get past 1500rpm I cant hear it..

Also my mechanic told me that i should have a look at the intake manifold, it could be filled with carbon.

 

/Michael

[cian]

Idle control valve, spark plugs, ht leads, coil pack

[harritz3257]

Problem was a few things.

 

Bad spark plugs, lambda sensor and the headgasket had failed between cylinder 2 and 3..

 

Changed the gasket, plugs and sensor along with a new stage 3 head and it runs smooth again :)