I've had some minor stuttering issues with the 86 GT. I had similar, but more severe, issues with my 88 GT sometime back that went from minor to major and was eventually solved with replacement of the ICM. Now I'm trying to troubleshoot the 86 to confirm the problem before installing a new ICM.
So, I performed the ohmmeter checks on the illustration below. The pick-up coil passed the two checks. The Ignition coil failed step 2 and step 3. I read step 2 to require low resistance ( good continuity) but I read infinite (open circuit) resistance on the meter. On step 3 (which is poorly worded) it requires low resistance ("should not read infinite"). Mine measured at infinite resistance (open circuit).
So it seems the Ignition Coil needs replacing... But these readings are total opposites of the required readings, ie: open circuit (infinite resistance) vs continuity (low resistance), and vice versa. My reason for questioning the validity of these checks is that the car actually runs. It would seem logical that these indications would seem to indicate complete failure. So why is it still running?
Am I missing something here???
And yes, I checked and rechecked the correct terminals to be measured and I know how to use an ohmmeter. http://images.fieroforum.com/2010/disttest_1.jpg
John Wayne as John Bernard Books in The Shootist...
" I won't be wronged. I won't be insulted. I won't be laid a-hand on. I don't do these things to other people, and I require the same from them."
1988 GT with a 3.4L V6 automatic
2006 Harley Sportster
'cause I love the twisties on two wheels or four.