Ok so I pulled the ECU and it's the cleanest looking thing on the car.
A previous owner has tapped into what looks like main power and ground. It's done properly with inline fuses and not currently connected so no big deal.
 

 
 The capacitors in the ECU don't have any signs of failure.
 

 

 

 

 
I think at this stage I'll rule out an ECU issue. I'm betting it will be the ignitor or something spark related.

Sometimes they'll look ok.

I had an ecu with 2 leaky caps (the rest looked good) that I replaced but the condition persisted until I replaced all the caps. It's cheap and easy to do, might aswell.

I don't disagree but none of mine appear to be leaking, and there's a chance I'll make matters worse with a crap fix. 
I'll come back to this once I've checked ignition and timing. 

Results are in...and Falcon is the winner. Dead fuel pump and clogged filter. Thanks for the help and suggestions.

Enjoy pulling the tank out, if you've got some nice friends to helps a lot it have someone help hold the pipe out of he way.
 
Have a read:
 
http://lovehorsepower.com/joomla/index.php?option=com_content&view=article&id=24:removal-of-fuel-pump-on-the-mr2-&catid=6:procedures--pics--notes&Itemid=29
 
It's not too hard just a bit frustrating

Good chance to clean up any rust on the tank too

I don't have the space to manage big jobs like this. I do have a solid mechanic though. Work underway. 

Out of curiosity, what is he charging you to do it? If you don't mind me asking.

Deevon
Out of curiosity, what is he charging you to do it? If you don't mind me asking.

Not sure yet. I'll PM when I get the bill. He's doing a few other jobs for me so probably a couple hrs labor and time to diagnose. He knows MR2s well and does good work. Rev Doctor in Asquith   

Cool, I remember when I bought my MR2 I had a heater hose leaking. Took it to a local "performance mechanic" who was highly recommended to me. He charged me $800 for time spent taking out the fuel tank and couldnt even fix it.
 
Now that I've done it myself I have no clue why he pulled the tank out in the first place and even then $800 in madness. And this was close to 10 years ago so he would probably charge more now! Needless to say I've never been back haha.
 
But yeah, if he knows his MR2s you'll be fine I reckon. Having a hoist would make it a LOT easier too.