http://www.pvv.org/~syljua/merc/TooSeptST07.pdf

This gives a general idea on the concept, and the side effects.

OK, I did the test at the alternator and got 0.2 ac volts. I'm guessing that is a good thing, after all the alternator is only 2 years old. My voltage sits a hair over 13 volts all the time. The missfire does seem to be slowly getting worse. I could have the car running and all of a sudden at idle it will sound like the car shut off for a fraction of a second, then it will continue idiling and repeat.

Thanks Again,
Matt

Hrmmmm.... interesting.

The AC voltage seems fine, so that'* likely not the issue.

It might be good to meet up with someone who has scan equipment, because the way you describe it could open up numerous possibilities, from crank position sensor, to ignition power dropping out, to even a bad ground, and everything in between. The scanner would take a lot of the guesswork out of it, so that you are not throwing a bunch of parts at it that it may not need.

Also, is there any trouble codes present? That may give you some place to start as well.

My Uncle has some obd 1 scan equipment and he will look at it on a wave length scanner.

Matt

I never figured out the misfire on the car but a brand new "Delco" ignition control module got this car back on its feet again for the next two years! The standard motor products "Magnavox ICM'* are complete junk, they only last a few months and then leave you on the side of the road.

Thanks for letting us know the fix!

Thread closed.