so since ive had my k5 its bogged down going up hills, well after an air filter new bosch platinum +4 plugs and some MMO shes running really good. those bosch plugs really make the difference, worth every penny i spent on em.

 

Hope that feeling lasts for you. Bosch plugs are junk IMO and the +2/+4 plugs are just a gimmick. Anyone with any electrical knowledge can determine why. Plus the damage that one of those prongs did to a valve in my brother's old jeep when it parted ways with the plug...

I'm betting the new air filter did more than anything else there unless your plugs were way over gapped or just plain done.

Glad you got it running good again though. Just wondering how long that will last.

 

+1 ^^^ Bosch plugs are junk

 

idk. the plugs seem to be working alot better then the old plugs that looked melted almost. the old air filter was toast, i was gonna get a k&n but i dont get my paycheck till the end of the month so maybe then ill get one.

 

To a badly worn plug, any new plug would feel like a night & day difference. Where the Bosch plugs in general are found lacking is in their life expectancy. A set of NGK v-groove plugs would have been considerably cheaper than those +4's and likely would last longer.