cps error

Wife's car left her stranded for first time. I found a crank-no spark-coils check ok,no codes though,seen this on my previous car-thought "cps". Trailered the unit 2hrs home picking up a CPS(the ugly one in the back side of the block). Checked the car again at home-same. Changed cps-no...

Hey all - 2000 LaSabre has 187,000 miles on it, I have read some of the post on this but I still have a few questions.1st the problem(s). I noticed that once in a while that tachometer was not working but stop and re-start and it worked. Then I had the occasional miss-fire at highway speeds...