10 replies to this topic

[Minitrio]

I have owned my MPI for over 2 years and have always taken my MPI to a local Garage to carry out any work or diagnose and repair problems. Due to the cost of living and a new addition to the family, money isn't so readily available, so i'm turning my previously aquired ametuer tinkering skills to the test.

So here's my problem: Fuel consumption up, top speed and acceleration slightly down, also a very cool (although probably not good) loud burbling exhaust noise on deacceleration.

Is my timing out?

If so how do i adjust it?

I have done timing before, but on various VW beetles and campers (my girlfiend converted me to mini's from the aircooled scene, haven't looked back!), but they never had ECU's!

I think it probably is timing,but this Rover ECU's and its sensors is bothering me. I've heard there very sensitive and can be very expensive if they go wrong.

A little help would be great.!

Cheers

[elvisthepizzaman]

its not the timing. all that stuff is computer controlled and it cant get out of adjustment as the magnetic pickup sensor is mounted to the clutch housing and unless a large blob of metal filings are stuck to it id say its something else.

are there any other symptoms? is it getting warmer than usual, is the coolant fan running all the time, any stalling issues or sputter/bucking. is it idling at its normal point? possibly leaking valve would explain the symptoms, can you do a compression test or a leakdown test to elminate a possible valve problem

Edited by elvisthepizzaman, 05 February 2008 - 11:56 PM.

[Ethel]

Could just be an air leak or as simple as a choked air filter.

[Minitrio]

Ok Sorry for the late reply, internet been down, cheers BT!!

Elvis i've been suffering majority of those problems, done a compression test and the readings are as follows:

C1 192
C2 188
C3 155
C4 190

So any ideas on sorting it out would be cool. Its getting louder everytime i drive it.


I have a K&N Fitted. How do i clean a K&N?

Thanks guys.

[Mini_Magic]

I have a K&N Fitted. How do i clean a K&N?

You're suppost to use official K&N cleaner products, but you can just use some oil and a rag to clean out each of the slots in the filter.

[elvisthepizzaman]

hmm. number three is off by a fair amount. I would say since cylinder 2 had much higher compression that the head gasket is ok. The next test you need to do is a pressure (leakdown) test. get a compressor and tie it into the third cylinder using the pressure fitting you used for the compression test, then turn the compressor on and listen for where the air is going. I would say that your exhaust valve on that cylinder is not fully sealing. Have you had the valve cover off to check the valve gap clearances?
what are your other symptoms that you say you have? more details..

Edited by elvisthepizzaman, 15 February 2008 - 02:49 AM.

[Danny_California]

Any more on this? My MPI has started behaving like this (also with the very cool but probably not all that great burbling exhaust when cold) and I havnt a clue where to start looking. Checked the airfilter and thats sealed fine, and its brand new so leaks/cleaning issues arent really that likely. I've no idea how to carry out a compression test either. How is your mini running now minitrio? What did you do to solve it?

[Dylan8660]

Sensors arn't expensive. Pop down your local scappy with various spanners and wire cutters and set about any post 96 rover. They're universal across the range. Also have a good check all around the exhaust and manifolds, you might find a good excuse for an upgrade.

[Pauly]

Could be the lambda sensor which is faulty causing overfueling??

Sensors arn't expensive. Pop down your local scappy with various spanners and wire cutters and set about any post 96 rover. They're universal across the range. Also have a good check all around the exhaust and manifolds, you might find a good excuse for an upgrade.

Its usually good practice to buy new sensors, which are not that expensive new, buying sensors from a scappy means you dont know if they are faulty. Buying sensors new gives you confidence that they will work.

Paul.

[Danny_California]

If anything it seems to be getting worse with me, and this thread is not exactly helpful lol

[bigmotherwhale]

set the valve clearances and run another comp test, if its still down it means you may need a rebore or new rings and a hone, what oil have you been using? try a cheaper oil and rev the nuts out of it, it may re seal the rings.