DLIDFIS issue

Rogue_Wulff · 02-08-2009, 01:06 PM

My GSL-SE has been converted to carb (edelbrock 600 and RB intake) along with the DLIDFIS system. The DLIDFIS was wired using 3 GM modules and 3 MSD Blaster coils.
When I got the car, it had major ignition problems, that I finally got corrected.
Then I parked it for the winter. Drove it to where it spent the winter running fine. Parked it, disconnected the battery, and left it untouched for 2.5 months.
I went over a couple days ago to get it fired up, and discovered no leading spark. It seems that both leading modules tested bad. I fired it up by putting the trailing wires on the leading plugs, and a couple spare plugs in the ends of the leading wires. Evem after running for a bit, still no sign of spark. That was when I pulled the modules to have them checked.
Anyone ever encounter something like this? It just baffles me as to how 2 modules can go bad, at the same time, without even having been powered up for over 2 months.

djmtsu · 02-08-2009, 04:45 PM

They are GM modules. Notoriously short life spans. Also, in a GM they are somewhat protected from the elements under the distributor cap. At least they are cheap to replace!!!!

Rogue_Wulff · 02-08-2009, 06:13 PM

And the plot thickens. I went and replaced the leading modules, everything was working great. Took the car for a drive, and the tach quit.
Yep, the 3rd module failed.........

These only had maybe 500 miles total on them. Of course, most of that time was with the wires between the modules and pickups in the dizzy reversed.

As being protected from the elements, the car has never even been driven in the rain, much less snow/icy conditions. In fact, it hasn't been driven at all in cold weather, as it has no heater. Heck, it didn't even get driven in the heat of the summer, since I got it after the hottest part of last summer, and it had been sitting in a garage for more than 2 years prior to that. It never left the garage, cause it didn't run very well.

I guess I need to study the wiring diagrams, both stock and DLIDFIS, and see what's going on. $20 each isn't that much, but it adds up fast, at this rate................

Rogue_Wulff · 02-08-2009, 08:21 PM

I think I have tracked down the cause of the module failures. The little condensor on the dizzy is not hooked up, and needs to be. Gotta relocate it to the plate the modules are mounted to.

Jeff20B · 02-09-2009, 12:45 PM

A power spike could do it. On percent's car the ignition was left on and when he hookd up the battery there was an arc. It killed the stock leading ignitor. Totally stock ignition.

02-08-2009, 01:06 PM	#1
Rogue_Wulff Non Member Join Date: Jun 2008 iTrader: (0) Posts: 310 Rep Power: 17	DLIDFIS issue My GSL-SE has been converted to carb (edelbrock 600 and RB intake) along with the DLIDFIS system. The DLIDFIS was wired using 3 GM modules and 3 MSD Blaster coils. When I got the car, it had major ignition problems, that I finally got corrected. Then I parked it for the winter. Drove it to where it spent the winter running fine. Parked it, disconnected the battery, and left it untouched for 2.5 months. I went over a couple days ago to get it fired up, and discovered no leading spark. It seems that both leading modules tested bad. I fired it up by putting the trailing wires on the leading plugs, and a couple spare plugs in the ends of the leading wires. Evem after running for a bit, still no sign of spark. That was when I pulled the modules to have them checked. Anyone ever encounter something like this? It just baffles me as to how 2 modules can go bad, at the same time, without even having been powered up for over 2 months.

02-08-2009, 04:45 PM	#2
djmtsu My minds tellin' me no... Join Date: Feb 2008 Location: Murfreesboro, TN iTrader: (10) Posts: 4,043 Rep Power: 21	They are GM modules. Notoriously short life spans. Also, in a GM they are somewhat protected from the elements under the distributor cap. At least they are cheap to replace!!!! __________________ 1976 Mazda Cosmo RX-5 1976 Mazda Cosmo RX-5 2003 Toyota Tundra TRD 2015 Toyota 4Runner SR5

02-08-2009, 06:13 PM	#3
Rogue_Wulff Non Member Join Date: Jun 2008 iTrader: (0) Posts: 310 Rep Power: 17	And the plot thickens. I went and replaced the leading modules, everything was working great. Took the car for a drive, and the tach quit. Yep, the 3rd module failed......... These only had maybe 500 miles total on them. Of course, most of that time was with the wires between the modules and pickups in the dizzy reversed. As being protected from the elements, the car has never even been driven in the rain, much less snow/icy conditions. In fact, it hasn't been driven at all in cold weather, as it has no heater. Heck, it didn't even get driven in the heat of the summer, since I got it after the hottest part of last summer, and it had been sitting in a garage for more than 2 years prior to that. It never left the garage, cause it didn't run very well. I guess I need to study the wiring diagrams, both stock and DLIDFIS, and see what's going on. $20 each isn't that much, but it adds up fast, at this rate................

02-08-2009, 08:21 PM	#4
Rogue_Wulff Non Member Join Date: Jun 2008 iTrader: (0) Posts: 310 Rep Power: 17	I think I have tracked down the cause of the module failures. The little condensor on the dizzy is not hooked up, and needs to be. Gotta relocate it to the plate the modules are mounted to.

02-09-2009, 12:45 PM	#5
Jeff20B Rotary Fanatic Join Date: Mar 2008 iTrader: (1) Posts: 215 Rep Power: 17	A power spike could do it. On percent's car the ignition was left on and when he hookd up the battery there was an arc. It killed the stock leading ignitor. Totally stock ignition.