leading spark vs trailing spark

speedjunkie · 06-14-2014, 01:51 PM

Thanks guys! I already picked up a set of new AEM smart coils and a harness from LMS-EFI, and I just finished a mount for them in the stock location. I wanted to see if I could get the car running first to make troubleshooting easier if I had put the new coils in and it still didn't start, but I'm thinking more now that I just have low compression. I'm going to pull start it again today though and let it warm up and check compression before I pull the engine. If I have decent compression I might try installing the new coils first. My only problem is I've never had luck getting accurate results with the piston compression testers (although I'm not sure why) and I've been told it will register less because we live at high altitude, but I'm not sure if that's true or how far it's off if that is true.

I have an 87 Turbo II also so I could try the coil from that I guess.

06-14-2014, 01:51 PM	#9
speedjunkie RCC Loves Me Not You Join Date: Mar 2008 Location: Colorado Springs, CO Posts: 2,089 Rep Power: 20	Thanks guys! I already picked up a set of new AEM smart coils and a harness from LMS-EFI, and I just finished a mount for them in the stock location. I wanted to see if I could get the car running first to make troubleshooting easier if I had put the new coils in and it still didn't start, but I'm thinking more now that I just have low compression. I'm going to pull start it again today though and let it warm up and check compression before I pull the engine. If I have decent compression I might try installing the new coils first. My only problem is I've never had luck getting accurate results with the piston compression testers (although I'm not sure why) and I've been told it will register less because we live at high altitude, but I'm not sure if that's true or how far it's off if that is true. I have an 87 Turbo II also so I could try the coil from that I guess. Last edited by speedjunkie; 06-14-2014 at 01:54 PM.