[chupie]

need your help, on my 1987 buick lesabre it just one day did not start. will crank but will not start, check for spark and there was none at the ignition modular, read on line that it may be the crank sensor so i replaced it $43.00 and still no spark, took a chance and changed the ignition modular $130.00 and still no spark. removed the cam sensor and cleaned it and still no spark so I gave up and had it towed to local garage. they called and said that the problem was the cam sensor and it will cost $300.00 labor and $200.00 in parts and diagnostic $500.00 total, so I told him why so much in labor and he said that they have to remove the water pump and timing chain cover and will take a long time and it's a big job and i said but i removed the cam sensor and i didn't have to remove any of those part and i did it in about15 min. then he said that another part that's bad is a part called the interruptor mannet and to replace it they needed to remove all those part mentioned.
well since the car doesn't run I couldn't just go pick it up so i went with the repair work, when I got it back it really doesn't look like it was dismantled in the area of the water pump and timing chain cover, all look the same as when i was working in the area. no signs of any anti freeze or movement of any water hoses I really think i got beat
my question is a bad cam sensor will cause a no spark no start but what about the interrupter, what are the signs of it being faulty will it still produce spark and what are the chances both parts failed at the same time, honestly now after looking at the car I really think the interrupter was never changed they are just no signs at all of all these parts removed, need your help
thanks in advance