Ok so its time to do maintenance on my volvo cause for some reason its having problems with power at the top end (high rpms) i went to autozone to get spark plugs but like always they try to sell the expensive they try to sell me the laser spark plugs because of better response is it true?? I change the spark plugs 1 time a year becuse i put presure on my engine i have a ard computer intake catless and its running 16 to 17 psi i put e85 now and then but i would like to know what you guys recommend?? And thanks for your time ✌

 

best plugs for an 850T are OEM or old school copper core plugs. The newer iridium etc plugs don't work as well on older engines which don't have direct coils. Also make sure the gaps are to spec - don't assume they are gapped correctly new out of the box. Have you upgraded any of the ignition components?

 

+1

 

+2. Copper plugs

 

Thanks cooper i will get also yes i ran into that problem when i had the car for the first time i did a full tune up and when the car build boost it makes pops and flames at the exhaust and find out they were gap to a non turbo volvo 850 🤣

 

your wires also have a date code on them. If they are older than 5 years, time to replace. One time I thought mine were good but changes them anyways, only to fine it was corroded under the boot at the distributor...

 

Thanks that will be changed two i have full warranty on wires,distribution cap and rotor also i will replace pcv sistem fuel filter and all them goodies to make it run as good as i can

 

Man especially with the turbos order OEM volvo plugs From FCP euro..free replacement forever and in telling you your car will like them... 93 octane as well as full synthetic oil... This things are not overkill in these cars... my 850R has 340,000 with a recent head job and still rolling daily....