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Comp.cams 274Xe Holley 3310 with proform 750 main body. Ported 906 heads Rpm Intake Headers I'm still leaning towards carb tuning, the new mainbody ( Installed start of last year ) is quite a bit different than the stock 3310 unit. Could be as simple as going up a jet size on my main...

No vacuum advance , and I do not have a fuel pressure gauge

I had this problem last year , and a new set of plugs seemed to clear it up ? This year its back again. It's a misfire at very light throttle , or as I roll into power. The harder I accell the less it is. I can watch my wideband, it show up on the AF gauge as lean spikes , and you can feel...

Here are fee more samples And if I change the time frame from the 5.00ms photo.

That would allow me to see multiple sparks , but would give me less detail per spark event ?

It is that E to F I am looking for .. where switch close and I should see a drop in voltage before the coil start to charge?

I did try that , I can take a picture of it tomorrow . But when i change the time base, that spike turns into very fine wave pattern. Similar to what you see at the end of the orginal full wage length. There is a slope up and then spike. Followed by very tight wave . I will get picture...

Playing with this again today. What I can't seem to get or "see" is any sort of dwell or charging of the coil ? The coil should charge and hopefully saturate , and possibly see a limiting signal before the switch opens and the high voltage spike to fire the plug. Any idea what I'm doing wrong ?

If you have installed a voltmeter , unhooked the ammeter and tied those wires together the same weak link at the bulkhead still remains. Voltmeter or ammeter, if you load the system incorrectly the same weak link is still there . Remember the weak link is the bulk head NOT the gauge. Now if...

Yes I'm measuring primary I don't have a clamp to read the secondary side.

Also..... why do I have such a huge negative . I get it now pkpk = peak to peak duh haha So I'm up 400 volts then negative 300v ? How is that possible ? Should it not hit 0 volts and stop?

I belive that is the correct probe to be using ? What I was really interested in was dwell and coil saturation. From what I read, I don't really see that in my wave signal. Should there not be a drop in voltage as the primary charges , and then if a slight rise if gets full saturated and...

That doesn't make any sense.... if you had a voltmeter and you see your volts dropping what are you going to do ? VS You have the ammeter and it shows a discharge , both are telling you the same thing. Actually the ammeter would probably show you something is wrong before the voltmeter would.

What is the 728v p-p mean ? My understanding is that I have it set on 100v scale so each square is 100v . My spike or fire of the plug is about 400+ volts would that be correct . I scaled the time in 2 different patterns 200 and 500us. How much is a US. Just liken vertical squares being...

So I picked up a cheap little oscilloscope to play around with. I was hoping to get some reading from my ignitio coil , to try and compare with 2 different setups. Also I belive they can be useful for checking alternators among other things. Basically just another tool I thought would be...

Yea , I was just trying to say how handy it is that you do have one ! You don't give to much info on the motor or setup. Is this a new build and carb ? If so you probably just need to go threw the carb and tune correctly. The pump cam alone may not be enough. You may need a bigger pump...

Careful of that lean spike at WOT. Bad things happen when You said it recovers quickly. But that still means there is a lack of fuel right off the hit. Make sure your accel. Pump is adjusted correctly. You may even need to look into a different pump cam. The AF meter is a great tool to have .

Found my old thread I made 10 years ago. http://www.dodgecharger.com/forum/index.php/topic,116416.0.html

Its a big job... I did it on my 68 charger about 10 years ago now. Have a thread about it somewhere . You have to unbolt the k Frame . It would make it incredibly difficult to do it with the engine in.