What would happen if you put a wire on the - side of the leading coil..and grounded it to the chassis..or any ground?

 

I thinking nothing...

although I'm not sure if it needs to be only grounded to the igniter or not.

 

well..i grounded that to the accesory (a/c, used to be p/s rack belt tension bolt) car started, i heard a pop...now i have absolutely no power under load....car revs freely "ok" but if i step on it doing 2500 or just lightly give it throttle. It hesitates when doing so big time, and makes a crackly sound....i know it has to that coil. I'm going to buy a DVOM (handy to have) and test for resistance.....I dont see how it would hurty anything though!!!

Oh..and again I grounded from the negative side of the leading coil to the chassis ground...

one other question...on the same bolt on the bracket, i had the battery regrounded on it too...it shouldnt matter though should it....its just a ground.

The only thing I can think of (thought) is that that negative on the coil reads, ground, no ground, ground, no ground (or spark, no spark right?) wouldnt it sharing the ground with the battery mess something up?

-Marc

 

bump

 

Grounding the neg side of the leading coil???

You mean you grounded the Green/Yellow???

Grounding that would do a couple of things...

#1 always be fireing the coil as long as it was grounded...
#2 throw your timing out the window (the mixture would ignite as soon as it reached the spark).
#3 probably overheat the coil rather rapidly.

In theory it wouldn't effect the ECU since it is only through a ground on that wire itself, but it may have damaged the internal buffer resistor as it is expecting there to be 12volts on the line when it has not triggered ground.

 

ya like I said I wasn't sure if it needed to be only grouned to the igniter.

I guess acording to icemark the igniter switchs the ground, and not the power.

you could probably ground the igniter to the body though...

 

Ok..thanks guys. I did the following today:

-Checks resistance of the coil, it was good. Round .07 ohms.
-Tested each wire on the leading for spark, one sparked, the other didnt.
-Took a LED tester, put the clip on the positve side of the coil, and the probe on the negative side, and started car, it flashed off and on rapidly so that checked out.

I think I just fried one of the coils on the leading pack (since there essentially is two). I'm gonna head over to the j-yard tommorow. Man new ones are spendy!!!!

Thanks again.

-Marc

 

Not the green yellow, I went out and looked, that one comes from the harness then has a white connector. One the coil itself, the positive and negative wire underneat the plastic cover. I took of the nut on the negative side, the put on a ground wire then put it back on (along with the other ground ofcourse). Started it, ran for 2 seconds, then I hear a pop.

Internal buffer resistor? Located in the coil hopefully?

 

Yeah on all the switched outputs from the ECU there are buffer resistors, to help prevent blowing up a gated array in the ECU.

 

What are the chances of that buffer resistor getting damaged? If it is, replacement of the ecu would be needed right? I'm thinking its ok....(hopefully).