1jz Plugs gapped to .20 and still blowing out spark?

[IJ.]

Only thing it can be unless you have a dead short somehow under power.

 

[kamikazemkiii]

Ill try upgrading the wire first, the one thats on it is an 18gauge. then if nothing improves ill pull the alternator. I see were the alternator could be causing this but do you think it is IJ?

 

[IJ.]

Pull the alt and take ot to Napa or Autozone and have it tested.....

 

[Supracentral]

I datalogged a run and at idle their are 11.7 volts, the biggest drop is to 10.5 at 13psi. Can i eliminate the map sensor as the problem since pressure showed up on the datalog?

Should be at least 13.8v under power there's something wrong with your alternator.

For sure the alternator?

You own an electronically controlled fuel injected car. It runs on electricity, it's filled with computers. If the electrical supply isn't 100%, nothing will work correctly.

So start with the basics:

What is the first thing your car needs to run? A battery - have it tested
What is the second thing that your car needs to keep running? An alternator - have it tested

Once you have those two items out of the way, you have a basis for a sound electrical systems. If your electrical problems continue after you have verified that the foundation is good, then start testing wires, once they pass, test components.

But I'll just about guarantee you that you won't get that far. Your electrical system is borked, and it's 90% likely you have a bad alternator, followed by possibly a bad battery caused by the bad alternator.

And when you're done fixing this, go back and replace your plugs with plugs gapped at about .029 - there's no reason to gap plugs down where you have them unless you're trying to push 45 psi of boost.

 

[kamikazemkiii]

You own an electronically controlled fuel injected car. It runs on electricity, it's filled with computers. If the electrical supply isn't 100%, nothing will work correctly.

So start with the basics:

What is the first thing your car needs to run? A battery - have it tested
What is the second thing that your car needs to keep running? An alternator - have it tested

Once you have those two items out of the way, you have a basis for a sound electrical systems. If your electrical problems continue after you have verified that the foundation is good, then start testing wires, once they pass, test components.

But I'll just about guarantee you that you won't get that far. Your electrical system is borked, and it's 90% likely you have a bad alternator, followed by possibly a bad battery caused by the bad alternator.

And when you're done fixing this, go back and replace your plugs with plugs gapped at about .029 - there's no reason to gap plugs down where you have them unless you're trying to push 45 psi of boost.

Thanks, just about to go outside and get started. Ill post up whatever i find

 

[4U2QUIK]

And when you're done fixing this, go back and replace your plugs with plugs gapped at about .029 - there's no reason to gap plugs down where you have them unless you're trying to push 45 psi of boost.

When I read the thread title this was the first thing I thought. From experience the only time I have ever experience the spark being blown out was on a blown hemi running nitro methane @ 50psi of boost, and they run magnetos in order to have a hot enough spark.

 

[kamikazemkiii]

Battery has tested good

 

[kamikazemkiii]

Alternator also tested good.

 

[Supracentral]

If you've elminated both of those, it sounds like a major short circuit or very bad grounds.

 

[kamikazemkiii]

I have run a thicker power wire to the ecu though, seem to be better than it was not great though.
the ECU doesnt have a ground? ive looked at the manual and the ground is through the wiring harness

http://www.enginemanagement.com.au/downloads/Stinger Manual.pdf

 

[Supracentral]

Reference the testing I posted about earlier. You've got a short of some kind. Putting a bigger wire in to power the ECU isn't going to solve your problem.

 

[perpetualthought]

you could check the coils by swapping them with a friends

 

[kamikazemkiii]

I heat shrinked the coils today, and am running a .30 gap im going to back it down and see if anything gets better and also do the 12v mod.

 

[IJ.]

I heat shrinked the coils today, and am running a .30 gap im going to back it down and see if anything gets better and also do the 12v mod.

What's the ECU voltage doing now?

 

[kamikazemkiii]

Its up to the 12's at idle now, drops to the mid-high 11's in boost. It levels at WOT to 12's-13's in the higher rpm's.

 

[perpetualthought]

did u ever resolve this issue