Wrong. An intermittent misfire will NOT set a code. The only way the ecm will set a code is if the coil's primary or secondary circuit fails. The only other way to diagnose a intermittent misfire is to access the misfire counters, which most "generic" obd2 readers don't give access to.

 

WRONG, its a guy with nothing better to do but stop you when you least expect it. giving you all sorts of CRAP then making you sgin a paper costing you hundreds of dollars.....

 

[quote=eightrac;7397498]"Performance" COPs net you nothing. The stock coils put out more voltage than the plugs will ever need.

Sir-We spent a LOT of time developing a performance COP coil. Our SOS coils allow you to open up your plug gaps to .065", burning your fuel more completely on each piston stroke. Stock coils are notorious about breaking down under a load(hard acceleration).

We utilized the same coil technology in our Sultans Of Spark(SOS) coils as we do in our DUI Distributors' coil.

Performance Distributors - High Performance and Racing Ignition Systems

 

Sorry to disagree, but I had exactly that happen to my Mark VIII. Start off from a stop and it was misfiring until it got to a higher RPM and stopped..... NO CEL! Plugged in my CODE Reader, it told what cylinder it was, pulled that coil - installed a spare, end of misfire and it never did set the CEL .

 

I had a misfire in my Expy (signature) about 4 months ago. Never got a CEL. Had about 104k on the clock and assumed it was either a bad plug or cops. Bought generic set of cops on Ebay for about $115.00 delivered. Installed new plugs (Autolite) and cops on passenger side first, fired it up and the misfire was gone. Changed out the rest of the plugs and cops since it was due anyway. It has been running flawlessly since.

I suspect it was the #3 plug and coil that was the problem. There was a rust color like residue on the COPS boot indicating there was water in the spark plug well. I've read that is a common problem sometimes, due to water run off from the cowling.

 

I'm going to have to wave the BS flag on that one. It only take so much energy to jump the gap on a plug. Hotter is nice, but with current resistor plugs used on DIS systems, it's only going to be so hot. The stock COPs already provide more than enough power to complete this process all the way to redline and beyond. There is no need for a "performance" COP as they basically already are.

The whole "breaking down under accelleration" you speak of is usually moisture, a bad boot or a bad spark plug. Other times, it is the COP but replacing it with a "performance" part doesn't get you anywhere when it comes to DIS systems.

 

You are describing a completely different system. Depending on what year the Mark was, it had OBD2 which will keep track of intermittent misfires, our V10s have the OBD2 plug but are OBD1 due to weight/emissions regulations. OBD1 only will set a code for a complete failure. I have encountered this more than once.

If you don't believe me, crawl under a V10 truck and look for a O2 sensor after the cat, there isn't one. Thats because it is OBD1.

 

NO BS here-we worked extremely hard on this project. Sure, the stock coil is going to jump the stock gap. No argument about it. There is no substitute for being able to run wider gaps(assuming you have an ignition system that is powerful enough to jump the wider gaps). Burning the fuel more completely is what wider gaps is all about. That's what the SOS coils allow you to do.

Although we respect your experiece, we will have to agree to disagree with you on this topic.

Ford SOS Coils

 

Your link provides no proof as to what the stock coils voltage actually is. It just says "The SOS Coils are designed with increased windings to boost spark output up to
40,000 volts! That is a 60% increase in spark energy over the 25,000 volts produced by the stock coils."

When the stock coils are in single fire mode, they put out well over 30,000 volts as seen on an occilloscope. Below 1500 rpm they put out what Ford calls "Multi-strike". They fire three times at idle and up to about 1500 rpm. Each strike is lower in voltage than when they are in single fire mode but it never goes below 20,000 volts as the voltage provided is twice the amount needed to fire the plug.

It only takes 7,000 to 12,000 volts to jump a gap on a double platinum resistor plug. Any higher output voltage is just making hotter spark. The stock coils put out more than twice that so theoretically, they could fire a much larger gap than what's needed.

I'm sorry we disagree but I could put a twin turbo setup on a V10 running 25 psi and still have more than enough spark. Not saying the engine would survive, but the ignition system would provide more than enough spark. Stock COP systems are already "high performance" enough.

 

When the stock coils are in single fire mode, they put out well over 30,000 volts as seen on an occilloscope. Below 1500 rpm they put out what Ford calls "Multi-strike". They fire three times at idle and up to about 1500 rpm. Each strike is lower in voltage than when they are in single fire mode but it never goes below 20,000 volts as the voltage provided is twice the amount needed to fire the plug. Our ignition systems, whether it's our SOS COP coils or DUI Distributors are superior to mult-strike systems because our ignitions produce a longer duration spark initially.


I'm sorry we disagree but I could put a twin turbo setup on a V10 running 25 psi and still have more than enough spark. Not saying the engine would survive, but the ignition system would provide more than enough spark. Stock COP systems are already "high performance" enough. The stress of the extra psi would blow out the stock coils' spark in our opinion. You would really have to close up the plug gap on the stock coils in order to use them on your mentioned setup.

 

What!!??? That is ludicrous. Eagle talons with the 4G63T engine running 23 psi run fine with their 25K system with the stock gap. I'm done going back and forth. You are obviously a salesman. Thanks for the laughs.

 

eightrac,

Spoken like you don't own any.

I do own a set of the Peformance Distributors SOS COP'S that I put in my 07 Dodge Magnum with the 5.7 Hemi. It uses the 'dual tower' version of the COPS (has two plugs per cylinder).

It has made A HUGE difference in my vehicle. As mine is a retired police interceptor, I was always happy with my performance, but decided after 125k miles, it was time to upgrade the COPS.

It went from really fast to 'HOLY CR@P better hold onto something.'

I'm getting ready to upgrade my 05 Ex V10 with these SOS COPS. Just going to also add the 5StarTuner with the 91 octane software and a set of Banks headers (from 5Star), so I'm hoping for a fairly nice bump in performance AND MPG.

As least that's what I got in my Magnum. You can't go wrong with the Performance Distributors SOS Coils on ANY vehicle in my opinion.