Hi all,
i have an Orion with a 1600CVH turbo with Efi management, its my on-going (4 years lol) project.
I started it when i was 18 and have turned it from a 1300L into.... well my pride and joy to be fair. It hasnt seen the road in its current state and has changed direction many a time. But the latest issue is.....

It wasnt starting. Would turn over and try to fire but would die. Almost as if something was saying no. If forced to start (ie holding the revs up a little) it would start but ran incredibly lumpy and as soon as the revs were let off it died. After much headscratching and trying just about everything i could think of, i found that when the MAP sensor vacuum pipe is disconected and bunged at the inlet side it will start and run.
When running it idled pretty well, however smelt heavily of fuel. Would rev through quite well and smooth but if held at a fast idle (2.5K) would stutter and pop a little and really smells of fuel.
While idleing (still with the vacuum off) if i disconnect the wiring to the MAP sensor the revs pick up briefly then it stalls.

I have contacted a FRST breaker i know who says there are 2 types of MAP sensor. Ford parts however list only 1 but the part number they gave me seems incorrect.
Plus just to spice it up a bit i cant even garentee the MAP sensor i have is a FRST one.

I suppose with all the above waffle i have 4 questions

1 - the dumb one - What exactly does the MAP sensor do?
2 - Is there 1 or 2 options with the sensor?
3 - does anyone have a part number for the sensor?
4 - and does anyone have any suggestion as to the problem or what i could try doing?

Believe me i dont expect miracles but iv heard so many good things said about the technical help on here. So please, anything could help.

Thanks all