Thanks to all for their help here. I went out and purchased a timing light and found I had no spark at the coil, much less the plugs - so apart she came. While everything "looked fine" I gave up and reinstalled the original cap and rotor. According to documentation they only have about 300 miles (and 13 years) on them. They looked fine. The only reason I replaced them at all is that I had already purchased the new ones by the time I burrowed down to the distributor. Here's my first bad. I didn't buy the new cap and rotor from a Delorean Vendor - I picked up a Volvo cap and rotor (genuine Bosch) from a local supplier. They looked so spot on perfect that It never occurred to me they were not right. Maybe they are fine - but as soon as I put the old ones back on I got my spark back and the rpm relay function was restored. My next mistake - when I went to clamp down the cap again the bottom clip (the one you couldn't get a good look at if your life depended on it) popped off. The clip is fine, its just not installed on the car anymore. I tried for a while to get it back on blind - then I gave up and used a cable tie around the clip base and two of the plug terminals. Its very snug for now but not how I wanted to leave it. So I'm back to where I was - I have spark and gas and believe it will run fine - have to put coolant back in the engine first to find out though, and that's still a few hoses away. Thanks again to all. > > Date: Sat, 2 Jul 2005 15:16:59 -0700 > > From: "Tom Tait" <TTait@xxxx> > > Subject: RPM Relay/ECM/Pulse generator Diagnostics > > > > Is there a procedure available to test the signal going to the >RMP relay? Can the relay itself be tested with a 12 VDC power supply >or do I need an alternating/pulsing current? > > > > Tom Tait #10902 > > 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/