Diabolical!

I had two different versions of the GMS coils. Both of them gave me a noticeable improvement (dyno verified) under high boost. Unfortunately, the failure rate on the coils was near 100% over time. GMS was good about replacing bad coils, but they went bad so often I just couldn't trust them. The general consensus is that it's best to stick with stock coils.

mustang racer06

I hope they last for me when i buy them at the AM show.

Tbones80

Dont bother imo. People with 800+ hp still use stock coils. Theyre more expensive cause theyre worth it. Spend the money on a real upgrade! Just cause somethings aftermarket doesnt always mean its better.

pascal

Well the thread is about a comparo between the Accel ones and the MSD...
Accel is simply junk sorry, so there's your answer.

I have 40k miles on a set of MSD on my F150 (5.4 2V). Not the same engine I know but that gives you an idea...
The OEM ones are trouble free up to 80k miles depending on the environment but it's a part that should last way beyond that IMO...

moosestang

Stock coils are not more expensive, unless you go through a dealer. They are all made in China, all of them. So given the option between stock vs. msd for the same price, I'd choose msd.

jpplaw

Anybody know if the FRPP coils are the same as the stock ones? I imagine they probably are.

moosestang

Well they don't make any performance claims, so there's a good chance they are repackaged stock coils. they only make them for the 2008+ 3v's or I might have bought some.

mustang racer06

Thanks for all ur input guys. I do think my coils r getting tired.
Sometimes at WOT the car lags alittle and then sometimes at WOT while accelerating the motor will revv but the power wont "come on" til a few seconds after. Any body hear of this? Could that just be how the automatics work? Thats why im leaning towards replacing them soon.

jpplaw

I had MSD's on mine for about 50k miles. One died on me (and threw a code) while I was on the way to Brenspeed. Luckily, I had suspected them of causing a mild hiccup during steady cruising (no codes though) so I had brought the stock coils with me on the trip to go on the new motor. Pulled into the nearest Walmart parking lot in Pennsylvania and changed them out and continued on my way out to Indiana. If, and when I replace the stock coils, I will probably get the FRPP version (only $299 at AM).

mustang racer06

Sounds like they lasted a while with out problem tho right? Id buy the frpp but i dont think they make them for the 06 with the bad head design