MPI

[Darrenfive0]

Hi,
Does anyone on the forum own or have access to a MEMS reader (I think ACR4) that can read an MPI ecu. I am based in the Peak District and can travel. It’s a long shot I know.

Cheers

Darren

[hanlminiman]

What"s the problem?
Cliff

[Darrenfive0]

Started running rough and continues to do so it now has a job to start. It does eventually but takes ages. It backfires on trying to start and has power dips through the gears. I’ve changed every sensor for new and replaced the coil pack leads and plugs. I’ve also replaced the injectors with second hand ones and it seems to be worse since I’ve done that. I’m all out of ideas and money now

[CooperTune]

Have you checked all your vacuum lines and connections? Steve (CTR)

[BAD942B]

Have you checked all your vacuum lines and connections? Steve (CTR)

was going to say all breather hoses, etc. problem which affected Audi's & VWs in the 80s & 90s

[Darrenfive0]

Hi, yes new CC breather and checked all the hoses replaced the 2 that go to the throttle body which was upgraded some time ago from the plastic one to an alloy one

[kit of bits]

How old is the fuel?
D

[hanlminiman]

Check that all the earth points on the car are excellent and also make sure the 2 multi plug connectors to the ECU have clean connections. Also check that no engine loom wires are chafing. Many years ago the AA identified that my loom was chafing against the clutch master cylinder and effected a temporary repair by adding rubber breather hose around the source. It's still there and I haven't had any problems from that since.

[Peter Laidler]

Haniminiman has probably hot the nail in the head. When I got my brand new RCSport5 in early 201, the Rover Cooper registrar in the MCR told me that the plug-in fixtures//connectors were the cause of MANY troubles, even back then! He suggested unplugging them, one at a time, smothering each part in silicon grease and plugging them back together. I do pull them apartr occasionally but never had a problem since. Except when I took it to s specialist about 'something electronic.....' and......... Anyway. I think that maestro Hanneyminiman has the answer.

I have laid mine up for 18 months over Covid and another 16 months to dats and it still fires first turn of the key. With a sealed fuel system, it shouldn't evaporate off I say

[mab01uk]

Some info in link below which may help.

MPi Electronic Diagnostics - Car Mechanics June 1999:-
http://mk1-forum.net/viewtopic.php?f=31&t=20751

[mab01uk]

TMF has a technical forum section dedicated to the injection Minis which might also be worth searching through the topics for similar MPi issues:-

Problems, Questions and Technical → Injection Mini Specific - SPi/MPi :-
https://www.theminiforum.co.uk/forums/f ... ic-spimpi/

[hanlminiman]

Thank you Peter.
What I didn't mention was the ECU problem I encountered on the way to the start of the 2006 Lombard Rally. Never did identify the source of the problem but car does run well now. Still clad with Lombard 2006 rally plates etc and the regulation Colway rally tyres and wheels for shows.
ps Spares now include ECUs, engine management loom and all sensors and the car was recommissioned this year and starts onn the button but I do disconnect the battery while in storage.

[Darrenfive0]

Check that all the earth points on the car are excellent and also make sure the 2 multi plug connectors to the ECU have clean connections. Also check that no engine loom wires are chafing. Many years ago the AA identified that my loom was chafing against the clutch master cylinder and effected a temporary repair by adding rubber breather hose around the source. It's still there and I haven't had any problems from that since.

Ok Thanks I’ll give that coat of looking at. Cheers

[Darrenfive0]

TMF has a technical forum section dedicated to the injection Minis which might also be worth searching through the topics for similar MPi issues:-

Problems, Questions and Technical → Injection Mini Specific - SPi/MPi :-
https://www.theminiforum.co.uk/forums/f ... ic-spimpi/

Cheers