This post is for Phil P. who says he's following my ignition thread. :) Recap: My car stutters as if from mis-firing (especially when pulling away from a dead-stop). All ignition components (plugs, wires, cap, rotor, ballast resistor, coil, ignition ECU) have been replaced without effect. Timing advance, both vacuum and centrifugal have been checked to perform correctly. Timing is set correctly, and was tested plus & minus the normal 13 degrees. The ballast resistance is correct, the coil resistances (both primary and secondary windings) are correct, the input voltage to the coil is correct. The coil is Bosch. Putting the old OEM coil back in doesn't correct the problem. All connections have been cleaned with contact cleaner and di- electric grease has been applied. Grounds have been checked and new stainless hardware has been applied. After speaking to several people, taking several readings and replacing several parts, I will now focus my tests on the pulse coil (in the distributor): The pulse coil generates a voltage as it spins, the faster it spins, the higher the voltage (DeLorean tech manual). Simply put, the ECU reads the pulses and converts this signal to a control signal which drives the coil. The car runs somewhat better when cold, especially in the morning. If the pulse coil is outputting a poor, weak, signal (such as while turning slowly at idle) the ECU may output an incorrect control signal to the coil. Garbage in=garbage out. The pulse coil resistance should be 500 to 700-ish ohms. I will get the engine good and hot, and if the resistance is substantially higher or lower than this, I'll replace the pulse coil. I will also read the output voltage from the pulse coil when cranking the engine. I have to check what it should be. Other owners have written me who are also having this problem. None of us have really checked the pulse coil so we'll see what happens. Rich A. #5335 To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/