9 replies to this topic

[ROcKING aNd RoLleR STaRteR]

hi
ive got a 1997 cooper 1275 mpi litterly no engine mods other than a maniflow lcb into a twin dtm back box and a k & n airfilter the engine has only just been rebuilt and just paased its mot for being on the road and has started to stutter along unless i keep the revs high for instance if im coming up to a junction and release the throttle a little the car will cut out(only the engine no electricals)


any suggestions???????????????HELP
here is a picture of the engine just before it went in it was fully rebuilt cleaned out and most part renewd

 2.jpg   739.86K   28 downloads




tom

[Ethel]

I can't offer anything specific. Clean and check all the electrical connections. Does it make any difference if the engine has had time to warm up, that might point towards temperature sensors.

[ROcKING aNd RoLleR STaRteR]

nope no difference at all how long the engine has been running but i thought it coul;d be a problem with the actual ecu its self....?

[Ethel]

That'd be rare like all digital devices it tends to be all or nothing.

[Juju]

Has it been out in the wet?

[ROcKING aNd RoLleR STaRteR]

nope always been dry garaged its a proper what the hell kinda thing iv taken it to countless garages to have it diagnosed by hand and machine........?

[minicooper1.3i]

I had this. I wasn't able to drop the clutch without it cutting out. It was a nightmare having to stick it neutral, then keep my foot on the gas whilst left foot breaking at junctions

Turned out to be a break in the wire to the MAP sensor. Over time, engine rock had caused it to start breaking up. If you've had the engine out, it's quite possible you've disturbed a dodgy connection / section of wiring. Get a multimeter on it and check the continuity, whilst somebody wiggles the MAP sensor wires around. Alternatively a diagnostic test will pick it up. It was the only way I found it on mine.

[Big Man]

How does the car idle?

[ROcKING aNd RoLleR STaRteR]

just over one when it does idle lol

[Big Man]

My cooper SPI had a really bad idle, it turned out to be a split in the vaccum pipes, both of which were split where they join the flame trap, a quick replacement and all was well, it may also be the air flow sensor that bolts into the air filer housing very easy and quick replacement and also could be the temp sender switch again a cheap replacement but really fiddly to get to on an Spi.

Would start with the vaccum pipes first, air sensor then temp sensor.

Cheers

BM