No Spark at all

[LuisMateoSpider]

Dear friends,

Looking for some advise regarding the ignition system, this November I replaced some serviceable items like, sparks plugs, spark plug wires, coil, oil, oil filter and air filter. Recently as well I removed the surface rust of all ground pods.

So far all was good until I changed the fuel filter, super simple right... Well I changed it, went for a test drive and all good . The same evening I adjusted the lever on the clutch pedal from under he car and I noticed that it was missing the lock nut so I fixed that and went to test drive it and, it would not start

I check the spark on the plugs and nothing, I check the spark in the coil and nothing... I took my coil back to the store and go another one since I did not know if the readings I got in my multimeter were right or not. And nothing... Then I thought it was a bad condenser, since they were quite old but that was not it.

I think I have reached my knowledge limit in this issue, the last thing is that on the coil I get 8 volts instead of 12...

Anyone has had the same issue?

[bobplyler]

Electronic ignition or points?

[LuisMateoSpider]

It's a points system.

[So Cal Mark]

8v at the coil is not enough

[bobplyler]

Have you checked the points gap?

[76was124]

Odd coincidence that working on the clutch cable and then no spark? It's a long shot, and other ground wiring would have to be messed up, but I've read threads about bad/missing grounds causing a ground path through the clutch cable. Maybe the clutch cable was your own electrical path to ground. Just out of curiosity did you grease up the clutch cable threads and nuts? 8volts at the coil? Bad battery or + connections, or bad ground? How confident are you the electrical system has a good ground from battery on?

[majicwrench]

YOu need to be more specific about the "8volts at coil" which post??

[LuisMateoSpider]

Thanks for comments,

I don't trust the wiring at all, I've found a lot of anomalies through out, the 8 volts are once ignition swhich is on out of the two cables that connect to it.

There is a large ground point coming from the transition to the chasis y thought it might be it but that cable looks good... I did lubricate the clutch spring underneath. The battery is reading 12v (I had it recharged since I drained it troubleshooting) the ground at the battery was apparently painted over in a previous respray, I'll clean that out.

The gap in the Sparks were recommended at .25

[RRoller123]

spark gap typically 0.028" - 0.032"

[LuisMateoSpider]

Looking at it a bit more I removed the cable to the cool and they do read 12v however once connected to the coil they read 8v I tested that with 2 known to work coils and both have the same results...

If I gound the positive side of the coil the wires read 12v

Does anyone know how to test the ignition mode relay?

Still no spark

[majicwrench]

LMS,
For us to be able to provide any accurate help, you are gonna have to give accurate information. "removed the cable from the cool (coi?)". Which cable??? Coil has several small wires going to it and one big secondary wire.

"They do read 12v" "They" meaning what?? All the wires??

Would like to provide you some help, but really need a bit more from your end.

Keith

[LuisMateoSpider]

Hi Keith,

I apologize sometimes I forget that you guys are not in my garage

(Cool) is coil that was my autocorrect.

I measured the L.Blue/White and Brown cable coming from the ignition mode relay 128/2 and ignition switch when "on" and read 12v not connected to the coil. Once connected the same cables read 8v. I have replaced the coil twice, and all react the same way, could it be a wrong coil? The current one is an internal resistor, and it was working before.

I also tested the spark from the coil to the distributor and nothing. I posted a section of the wiring where I'm stuck.

[majicwrench]

Hmmmm, #1, wiring diagram is not complete, so hard to see what it is telling,

#2, methinks we are still not getting accurate info. You can't possibly have two wires (L.blue/white and brown) both with 12 volts, then hook them to a coil ( on the pos and neg terminals) and have 8volts. Do both the L.blue/white AND the brown wire have 12v when not connected, or just one of them?? It should only have 12v on one of those wires, not connected to coil.

[kilrwail]

I suggest you check the points gap as was suggested above and verify that the points are not broken. I had a similar problem years ago and traced it a set of points that had fallen apart, all by themselves. I now carry a spare.

[LuisMateoSpider]

Hi,

I checked the points and they seem fine.

The 12v comes from the L.Blue/White cable only, this cable comes from the ignition switch, and connects to the positive side of the coil. The brown cable is grounded and connects on the negative side of the coil and comes from the ignition mode relay.

Here is a link to the wiring diagram.

http://i1328.photobucket.com/albums/w52 ... mtqzh.jpeg