hi ive finished my mpfi convertion but it wont start.on the tutorial it says to cut the grey/white wire near the idle motor plug and extend it upto the main loom plug and add a pin on the end.then put it into the so that it lines up with the grey/white wire on the mpfi loom.does this need to be done i would have thought that just swapping to a mpfi loom on would be okay.if it does need to be done then what exactly is the idle motor plug?
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The isc plug will not cause the car to not start. What does the car do, does it crank over with spark(if so it's your dizzy, probably 1 cog out, retarded timing too much).

If no spark then do you have a little pink wire down near the throttle body that isn't connected.?

You hooked up ya fuel lines the right way?

My car refused to crank when i had my TPS wired up =\. I still dont have it hooked up . Try unwiring the wire and try to crank it.