Thread: Engine sputtering and no power. Help!!!

Originally Posted by Fivefingerdeathpunch

You want to run the hottest spark possible for the mods you have. Which means you dont want to run a stock plugs because thats too hot.

delco is stock heat range

605's are 1 step colder
104's are 2 steps colder
103 are 3 steps colder

With the mods you have, you are running alot more HP than stock and alot more boost than stock, so with all that extra fuel and air you dont want to have a spark plug that runs really really hot.

The coils on your car do absoluty nothing to help gain a hotter spark, the ignition system can only put out so many volts and those coil packs cant change that. MSD coils are junk and are known to cause problems.

Its not the best explanation of why, but more reading on your part and your figure out why you need colder plugs.

From what I gather, you modded your car without any knowledge of how these cars work or you bought it already modded.

You should sit down and read what your mods are doing for the car and how they work. You need to understand how the motor works to understand why fuel, air and spark are so important when modding.

Your very right. I don't know. That's why I'm here. The car was modded before I got it also an it had some problems. Mainly that guy I got it from didn't k ow what he was doing either. I'll take the advice and do my homework. Thanks a lot.