I know that only FORD 515 plugs are to be used to guarantee smooth operation but what about aftermarket COPs like ACCEL?FORD COPs are $107 each compared to $56 for the ACCEL.Of course I would change all 8 and not mix them.Would it be a good move or will I wind up with more missfires or worse?All prices are in CDN dollars.

 

OEM IMHO is the only way to go for both reliability & performance

 

hard to justify OEM when you can buy aftermarket COP for $10. each ....... I buy a box and replace as needed. Normally loose about 1 per year... They only take 15 minutes to change out one. I have had aftermarket last 100K miles, and had 1-2 go out in 20K miles.......... quality is not as good as OEM in some cases.

 

Did you price OE COP's through Tasca or Rockauto? They're typically cheaper than the dealer price.

 

@tc829


One of these thingys is a lot cheaper than even one OEM or Aftermarket COP.



IMO, thousands of COPs are needlessly replaced (OH, on mine TOO!) because of other sneaky causes that we inadvertently cure while goofing with other things replacing a perfectly good COP. Truth of the matter is, there is not a damn thing inside one to wear out, deteriorate, degrade, corrode or otherwise loose effectiveness - with a few exceptions. They are just two different length coils of wire wound around an iron core and sealed in epoxy. A crack in the epoxy can allow moisture in or a short between windings (resulting from the moisture) can reduce effectiveness. And ohm tests are useless. But with the linked tool attached to the COP you can even determine the approximate voltage produced by the secondary windings. Twenty, thirty or forty thousand volts sure should fire a plug if everything else is in order.


JMO

 

Thanks once again for all of the input.I just invested in a better OBD2 tool to hopefully detect problems sooner.I believe the spark tester would be a good companion tool along with a few spare COPs. I can handle changing the COPs,the plugs however are a different story,"know your limits"!I will pick up some MC 515s to have on hand in case of problems so that labor will be the only issue.As for the COPs,I will try out the rockauto OE.