I have a '94 VDP that started having problems running. On occation it would thke several tries to get it to start. Prior to this the Jag would always start on the first few turns of the engine. At the same time I was having the starting issue, the harmonic balancer was starting to go out. The issue progressed to the point that the Jag would quit running while driving it, mainly when starting off from a stop light, it would just quit as if I turned off the key. I would put it in natural and crank the engine and it would start again. I attributed the issue to the harmonic balancer and didn’t think much more about it. I sent the harmonic balancer off to Dale Manufacturing in Oregon to be rebuilt. I installed the harmonic balancer after getting it back and the Jag fired right up. I had a conversation with Dale about the Jag being hard to start and dying while running and he told me it was not the harmonic balancer causing that problem. As it turns out he was right. After replacing the harmonic balancer and starting the Jag several times I drove around the neighborhood, no problem. Next day, no start for several tries after which it started. for the next few weeks it continued to start and run perfectly. I got up enough confidence to take it out on the freeway and run around the neighborhood, perfect. I decided to flush the radiator. I put flush in and drove around a while, drained and refilled several times running the engine in between. Once finished I got in to park the Jag in the garage and no start and that was several weeks ago. The issue is no spark and the following is everything I have tried to resolve the no spark issue with no success.
I have followed the guidelines outlined in the [xj40] Trouble shooting the No Start condition.
#1 Check the spark at the spark plugs - NONE
#2 Pull the coil wire from the distributor cap to check for spark - NONE
#3 Pull the plug on the ignition amplifier and measure the voltage between pin #6 and ground - 11.85v
#4 CPS on the front of the engine has proper resistance - 1365ohms
#5 Swapped out Amplifier with another known good Amplifer - Still no spark
#6 Replaced spark coil
#7 The wiring is bad - This is a possibility but have no idea whare to start
#8 ECM is bad (least likely)
I did replace the coil though I don’t believe it was bad. the only thing I haven’t done is replace the ECM and I’m pretty sure it’s not bad. Any other ideas would be greatly appreciated