Engine is cutting out.....

[GlennyGills]

Thats me exhausted of my meagre knowledge

[blackyb]

So, it's not something obvious or a usual suspect at fault, so it's something not often seen
Fuel system is fine, pressure and deivery, throttle positioning correct
Electrical main systems are fine, battery, alternator, plugs and coil packs.
Air system is fine, air flow meter .
So are we looking at something after all that, have we checked the lamba sensor, could a dodgy or failing lamba affect the general overall running. It did on a Range Rover we were looking at a few weeks back.

But I'm no mechanic just an average spanner thrower, that's why we have our Mm to turn to.

[Mazda Mender]

Lamba sensor as been changed and still made no change to the cutting out.
M-m

[blackyb]

Well that's me done.

[Mazda Mender]

So you are going to leave him stuck.....

[blackyb]

No, I've got your mate with the recovery truck to pick her up and drop it off at yours.

[Mazda Mender]

You give up to easy , this was an interesting resolve to this after it was also cutting out dead while driving....
M-m

[blackyb]

Well two of us have had a go but we have run out of positive ideas.
Doesnt seem to be any more Menders sticking their heads up above the parapets to have a go at helping poor old Pete.
The only thing I can think of now is an ignition issue. (switch or relay)
If that's not the issue then I for one have used up all my mechanical/electrical knowledge on MX5s.

[Mazda Mender]

Ok so we plugged in a spare ignition barrel and switch to the loom and just cable tied it in place to test with as well as the original still in place which meant that we had to use two keys for testing one for the steering lock and one to start.
After a week of running her the fault as gone, so we swapped the ignition switch, and put it all back together and as not missed a beat since.
On deeper inspection we took the old switch apart to view and found that all the brass contacts were all full of carbon build up which must of been cutting power when warm, so after a clean and all back together, swapped them back and all is good, which also explains why we see the loom plugs melted a lot when replacing them, now it will be a case of removing them and giving the 30 year old switch a well deserved clean and re fit.
to to two that followed the process...never give up , the answer and solution is always around the corner.

So he is a happy owner and on his way enjoying his pride and joy until the next time........
M-m

[blackyb]

So I almost got there then.

[GlennyGills]

Glad to hear Pete/Chris got sorted out. That was not an obvious one