before anyone says it... i searched already.

my car was running swimmingly 2 days ago, and now i have no spark. i am at a loss as to where to troubleshoot now. running 2GDFIS (leading), coils are good, ignitors are good, tach works, etc. nothing with the setup was changed on the car relating ignition from when it was running to today. we were messing with the wiring for the lights though. anyone have any ideas????

 

So just no spark on leading, correct? Sounds like you have trailing spark as the tach is working.

How do you know that the ignitors are good? Usually sudden loss of spark is most often a blown ignitor. Could be a fuse or disconnected wire, but probably not a blown fuse. If you are powering the 2nd gen coil from the 1sxt gen coil power, then you know you have power as trailing works (same circuit).

Turn on the ignition and test for power on coil (+) and (-) as well as both wires on the leading ignitor. All should be reading about 12v. If you have power all around, then it is probably the ignitor. If the ignitor checks out, then a bad coil (not likely) would be the case.

So check wiring, check that you have power, then check the ignitor (switch with another), then swap out the coil if all else fails.

 

no spark anywhere. strange that the tach is working, but im not getting any spark. i was getting 12.4ish volts to the coils. and i swapped dizzys when i thought it might be the ignitors, and tried a different coil, and still no luck. fuses look good too. i had a burned main ground off the battery, but fixed it, and still notta. i am 100% lost...

 

I went through a like situation a couple of weeks ago. I would double check the coil(s) to see if there is any spark at all from the coil. If not, disconnect all the power from the coil(s) (including the tach lead at the positive terminal) and wire everything directly to the battery. In this 'circuit' you have the battery, the ignitor(s) and the coil(s.) a failure at this point with known good (see coil test in your manual) coils means it has to be the ignitors.

... And a second word on ignitors... I've had "known good" ignitors sitting in drawer for a month, that ceased to be good as soon as they were installed. As such, just because you had ignitors living on the distributor doesn't mean they are good at the time of installation.

And a third word; there may be a FUBAR in your wiring that's toasting your ignitors.

tl;dr: Ignitors.

 

Are you sure you're not getting spark? Maybe there's a spot of carbon in your plugs or something. You might want to pull the wires off the plugs, put them (1 at a time) on the strut top studs, and check for spark there. If no luck, pull the coil feeds to the dizzy, lay them near the same studs, and try again. I use the strut studs because they're visible from the a-pillar area without an assistant, but in any event, make sure you're really missing spark.

 

Change your plug wires.

 

The fusable link on the driver tower wasn't making a good connection last time i was getting no spark.

 

Yeah, there's a good possibility, 85TIIDEVIL. I went with an FC fuse block and occasionally lost my RE-EGI power in my GSL-SE. The culprit was a stock spade in the FC fuse block whose tab didn't stick out very far. When I pushed the fuse in it made slight contact with the spade, then pushed it out the bottom of the fuse block. Stuff like that is easy to miss.

 

I've been helping him by PM. Here is a basic run down of what we have found so far:

- He DOES have trailing spark
- if he swaps the connectors on the ignitors, he still has trailing spark..so ignitor okay
- has juice to coil (+), (-) and both ignitor terminals. Voltage a bit low (about 11v), but battery may be a little weak.
- tested resistance between the L1/L2 output at coil. Resistance there matches my 2nd gen coil (~15kOhm)

- Repeated test with plug wires connected. He got about 24kohm..so about 9kOhm for the pair of plug wires. This is about right. It also tells me that the plug wires are fully seated in the coil (sometimes not the case especially if trying to use 1st gen wires).
- He said that he has tried using several different spark plugs when testing for spark, so this pretty much rules out having a bad plug causing the lack of spark.

- I am currently having him check the resistance between coil (+) and coil (-) to see if the coil may be bad. Double check wiring (maybe run coil (+) directly to battery).

- He is not using the ballast resistor in either coil that he tested. I know that some have had to switch between no ballast and ballast to get the 2GCDFIS working correctly. For some, it works fine either way. I mentioned to try to hook this up if all the other tests pass.

- Told him to try to replace the 2nd gen coil with a good 1st gen coil to double check the wiring and ignitor. If the 1st gen coil fires, then the problem has to be in the 2nd gen coil.

I think that pretty much covers it. It may just be that the electrical connections to the coil are not tight/clean enough. As I said, the voltage is a bit low there, but I do not really know the state of his battery to know if the battery is a bit drained or if the lower voltage is due to a poor connection.

 

I'll lay odds that its somehow due to whatever you were doing with the lights. Try to step back through that work and see what changed.

 

i'll be trying the 1st gen coil today, and chasing the wires in the whole harness. maybe something is shorted out or something? (i realized i got shocked a few times getting out of the car) thanks for all the help addict! you'll be hearing from me soon im sure.

 

STUIPID STUPID STUPID!!! it was a simple reversed polarity (i hooked it up backwards). im such a dumbass

 

I told you it was probably something silly.

So all is good now? Glad you got 'er figured out.

 

Wow lol.

 

yeah it took me a few hours to figure it out. I also got the timing close again.
I got the car runing, let run for a few minutes and shut if off.

as long as you dont touch anything else. you just might be able to drive it this summer.....kids kids kids

 

you have alot of patience for stuff like that.

lets not forget the fire!!!!!

 

Oh yeah I tried to start it on fire. there was a rag laying on the header, that I didn't see.

Codeblue2 made me put it out......hahahaha. She called Greg at work and told him that the fire dept. had to come and put it out.

 

lol. i about **** when i heard that. she played it off good.

exhaust > microfiber towel