4 replies to this topic

[hsamy]

Hi everyone, i am new to this forum and have a problem with my 1999 Rover Mini MPI. The car is in Dubai and it came from Germany so i purchased it about a year ago and have been having many issues with it since then. The most recent one is misfiring in cylinders 2 and 4 according to my mechanic. We changed almost everything; spark plugs, wires, coil, the entire throttle body assembly, and have come to the conclusion that the ECU is faulty. I am told that the injectors are not spraying fuel consistently. Can someone please advise what to look for given this description of the issue? Thanks 

[sonscar]

Vacuum pipes,fuel trap,fuel filter spring to mind.cyls 1&2 use the same injector as do 3&4.cam sensor faulty?just thoughts
You have checked engine health,compression,valve clearance manifold leaks,Steve..

[68+86auto]

Get a mechanic with an oscilloscope to have a look. It can then easily be determined if it is an injector issue vs ignition issue and what is the cause.

Edited by 68+86auto, Today, 10:27 AM.

[Ethel]

I wondered if it had been plugged into a scope & they didn't realise the MPI has asymmetric injection for the siamese ports.

 

It does seem unlikely to be the ecu if it's firing at all.

[Fast Ivan]

Have they established if there is or isn't sparks coming from each of the leads? Have they done a compression test and do they have the results? 

If they're content to just swap things out then there's the crank and cam sensors left to go