Another NO SPARK issue

This has got me absolutelly confused at what is wrong. The car was running fine last time i had it started, months ago, now it doesnt start.

I have Fuel
I have compression
I have NO SPARK


In the ON position, 12v power has been tested and confirmed at the ECU, COIL and IGNITOR. When i crank the engine, the multimeter picks up like 12 volts on the coil output to the dizzy. When i hold the high tension wire, i get no jolt, no spark still. I'm stumped.


Is the coil rooted, or what about the ignitor.

 

I put in a coil from a toyota starlet gt, a coil that i used previously and was in working order. The coil is identical to the celica, still no spark. I just cant understand why there is no spark. I had the car running perfectly last time it was running. The car was not started for months, and yes, new fuel was put in etc, not the issue.

There is no way in hell im going to spend $220 on a 2nd hand ecu. Its just crazy. im so pissed, i may buy a complete aftermarket ecu.

 

Would i be able to use any bosch type coil, like a coil pack type, but just 1.

 

I used a coil from a RAV 4, same as celica, but probably with different numbers printed on label, and still no spark.

No idea if its the spark or dizzy, but why would dizzy fail from nowhere.

 

Resistance on the primary side of the coil showed 1.3 ohms, so is that no good. This result also showed on my starlet Gt coil, so yeah, im confused.

 

Reporting in.



With the ignition in the ON position, neg and pos side of the coil is energized with 12v. Is that normal. Both sides? Like i could understand with the positive side, but why also the neg side.

Secondly, when i crank the engine, the positive still has battery power, but the neg side voltage drops to like 0.** volts.

 

Reporting in.



I checked for voltage on IGT during cranking and there is none.
I checked for voltage on E1 and there is voltage.


So this means the ecu is cactus. Would there be any blown circuitry componants that i could identify, or is it a silent killer. So just to clarify, this means the ecu is fudged cos its not sending any signal to the ignitor?


Thanks for this little check 1Fstgts, now i can narrow down exactly the culprit.

 

oops my mistake, i took the reading from E01 and not E1. Both E01 and E02 show small voltage, which would be normal as its power ground etc.


I disconnected the plug to the ignitor and tested voltage at IGT, still nothing, no voltage, so it appears now that the ecu is indeed rooted, aye.

 

All ground points have been unbolted, sanded back with sandpaper and re tightned, this includes where the ignitor bolts to the firewall.


I really doubt the dizzy is faulty, since there is no signal from the ecu going to the ignitor, i guess it has to be that. If i cant find a ecu locally, i would really appreciate if i can get one from you folks.

I used 3 different coils, same result, so that means the coils should be fine. I used another ignitor, still no spark, so it should be the ecu, how it failed, i hnf idea.

 

From IGT output from the ecu, as expected, no, no voltage or signal.