need coil help

[MKIII TURBO60-1]

so i was tunning my car earlier today, everything was going good, add fuel take away some fuel, then it wouldnt do anything, i checked my wiring thinking maybe a wire car lose or something stupid, i also noticed i wasnt running as much vac as i was earlier, maybe just a small leak still runing 18 vac, so then i decided to check my timing, hooked timing gun up to number 1, flashed a couple of times i seen that it was way above 10 like around 20 something then it quit flashing, i think to myself ok maybe its the wire so i switch to number 6, no flash, so then maybe my wires are going bad so for giggles i hook up number 5, flashes perfectly so then i switched the wires up so number 5 wire is on 6 coil and plug, no flash, car sounds like its running on all 6 cyclinders, is my coil becomeing weak and dieing??????? btw i did use a jumper wire like ur suppose to while setting timing

 

[cjsupra90]

Unless you have a total crap light, I would suspect that its not firing the 1 & 6 coil pack. If the light wont pick it up, then the coil is not firing most likely, unless the light is total crap and is not sensitive enough to pick up the magnetic field (which I find hard to believe... Inductive lights dont usually take much to trigger them.. Hell, I trigger mine off of one of the primary wires going to the coil cause I dont have a high tension (plug wire) being that I have COP's on my UZ... I've even cheched injector pulse operation that way)... Just to make sure, pull the 1 or 6 wire off the plug and stick an extra plug in it and hold it to ground and fire up the engine and see if it fires (and continues to fire)... It not then check the coil based on the TSRM. If that is good, then move to the igniter and check it... Basically process of elimination.....

 

[MKIII TURBO60-1]

its not the light, it picked up on other wires but not one and six and i switched one of the wires it did pick up on onto 6 and it didnt flash, i think the coil is dieing

 

[cjsupra90]

I was just saying that even if the coil was weak, it would still pick up with the light... I would suspect a dead coil not a weak one.... Just to dubble check that it is the coil, try swaping the coil itself with one of the other two that you know work and see if the problem follows the coil or if the # 1 & 6 are still dead... If the two cylinders that you put the suspected bad coil on are now dead and the # 1 & 6 are firing, then its the coil. It the # 1 & 6 are still dead and the other group that you put the suspected bad coil on still fire then you know the coil is good and the problem is else where...

 

[MKIII TURBO60-1]

wouldnt the car have a big miss if one and six werent firing???

 

[cjsupra90]

wouldnt the car have a big miss if one and six werent firing???

Yeah it should.. and in all actuallity, if the coil was bad, you would drop both cylinders on that coil, not just one of them... Even if the coil was very weak, the light should still pick up when hooked to the wire...

Does the engine seem to break up under heavy power loads?

The coil output is based on cylinder demand until the coil is maxed out... A coil only puts out what is need to jump the gap at the plug and engine load will increase or decrease the cylinder pressure and thus the amount of voltage requiered to jump the gap of the plug and thus the voltage that the coil puts out... Regardless though, if its not breaking up or missing at idle, the light should be flashing....

 

[MKIII TURBO60-1]

it runs and drives without a miss just running rich and cant tune it out and and timing is way advanced even at idle around 20 something if not more