[zatro]

I just installed new spark plugs, screamin demon coil pack and new wires. Tried to turn car over but made funny noise and wont stay started! I check all the wires and connections and all seem fine I need help fast!

 

[JOSHSTANG]

make sure the numbers on the coil are in the correct order

 

[stars]

Hi Zatro,
You may have plug wires 5 and 6 reversed. They don’t follow sequence. Here’s a diagram that someone once made on the forums. Check to see that you have all the wires going to the correct coil tower, especially 5 & 6.

 

[Ohhitskb]

Might check the plugs and make sure they aren't damaged, Make sure you get the little "click" when putting wires on, etc. I can't really think of much else.

 

[Ohhitskb]

Hi Zatro,
You may have plug wires 5 and 6 reversed. They don’t follow sequence. Here’s a diagram that someone once made on the forums. Check to see that you have all the wires going to the correct coil tower, especially 5 & 6.

Ohhhh good point. I almost did that with mine once.

 

[geraldcash20]

U also may have cross thread on your spark plug

 

[zatro]

Okay guys the car wouldn't even start with the new coil pack so I just put in the oem coil pack, car started but sounded really rough (almost sounded like a v8 :cooldude, but anyways I checked plugs I did have the 2 plugs switched. Started car and it purred like a kitten (with factory coil pack).

Anyways tomorrow I will try switching the coil packs again 1 more time when I have the energy. Since my plugs are gapped to .065 would it still be okay to drive with the factory coil pack at that gap?

 

[HenryinFlorida]

I don't see where it would hurt for one day

 

[zatro]

I just tried the sreamin demon coil pack again and still the car wouldn't even start! I just put the factory coil pack back on with new plugs and wires and car starts just fine....

I'm going to give Summit Racing a call tomorrow and request a new coil pack be sent out.

 

[stars]

The stock coil is actually pretty decent. I measured mine and it had a turns ratio of 88:1, which with a primary firing voltage of 450 volts equates to a secondary open circuit voltage of over 39 KV. The SD coil is only spec’d at 45 KV (100:1). The .065 won’t hurt anything with the stock coil, but you may notice a loss of power at full throttle compared to a narrower gap (it may actually run better at idle and part throttle though).

 

[zatro]

I think they sent me the wrong coil pack if you look at the pic the plug is different then from the one on AM.

Screamin Demon Coil (05-10 Mustang V6) at AmericanMuscle - Free Shipping!

 

[JOSHSTANG]

i bought my coil and live wires from mossmuscle.com
no problems, maybe you bought a defective coil

 

[amustangrocks]

it is the wrong coil.

 

[stars]

I think they sent me the wrong coil pack if you look at the pic the plug is different then from the one on AM.

Yeah that doesn't look right. All the one's I've seen for the 4.0 have the low-volatge connector horizontal. Here's a link to the guys behind the SD coil:

2005-2010 Mustang V6 Ignition

 

[HenryinFlorida]

Check the part number. You should be using part number 31738

 

[mrjimmy]

screamin demon is a POS,,,get your money back..been there done that

 

[zatro]

They sent me 31736, but I needed 31738.

 

[HenryinFlorida]

I don't know about it being a POS, but like most add on's. the companies have a tendency to exaggerate performance gains. I also think adding quality wires, and regapping the plugs can cause some improvement on their own.

 

[05mystang]

I don't know about it being a POS, but like most add on's. the companies have a tendency to exaggerate performance gains. I also think adding quality wires, and regapping the plugs can cause some improvement on their own.

+1 on that. I'm not saying you won't see any gains from the SD Coil, but most (not all) people who notice a gain probably needed to replace their plugs and wires anyways.

 

[stars]

+1 on that. I'm not saying you won't see any gains from the SD Coil, but most (not all) people who notice a gain probably needed to replace their plugs and wires anyways.

Yeah the stock plug wires aren’t really that good in these cars, and replacing old plugs who’s gap has opened up and rounded off from long service also helps quite a bit. Not sure if the SD coil actually contributes much or not, haven’t made up a test jig to compare the actual energy (measured in joules) output of the SD coil vs. the stock coil (it’s kind of a pain to do, especially when you don’t have all the equipment on hand). That’s the important number though, as far as the coil goes, and one that’s rarely given by marketeers.