spark plugs

ok it's time to do a tune up on my 02 2.7 and i was wondering which plugs to go with, i leaning towards denso's but i was also wondering if there was any benefits to going to a hotter or colder running plug. also what gap should they be at?

 

If memory serves: .44 gap

Denso iridiums are what are hear most people say are good, and since your not boosted, stick with stock performance plugs, no need to worry about hot or colder yet

 

Typically, boosted engines, high-compression engines, engines which run racing fuel, and engines which are run in the higher rpm ranges do better with cooler plugs.
Low compression, low rpm engines with low octane fuel like hotter plugs. Hot plugs are also good for two-stroke engines or oil burners.
Most drag cars I sell plugs for run NGK's two to three steps colder than stock.

 

Thanks for the posting Chris4X4! I have been scratching my head on this question for a week now, wondering if I put the correct gap in my plugs.

Okay, so I know that I didn't put the recommended plugs in my truck; however, I put ones that were listed as compatable with my 02' 2.7 4cyl Taco. I'll probably end up changing them out for the recommended plugs on the PDF you provided but I have a couple questions in general.

The plugs I put in were Autolite single platinum and on sparkplugs.com, it says that the gap should be .32 for my tacoma (or at least that is how I'm reading it when it says that the "OE" is .32). Could be just my lack of understanding the acronym "OE"?

It then says that some of the Denso's are .44. I'm confused in general on gapping. In theory, if the same plug is appropriate for 2 totally different vehicles, is it common that the prescribed gap could be different as well, or does the particular plug dictate the gap?

Last question would be, if the fsm is calling for a specific Denso, then would upgrading that to an irridium denso call for the same .43 gap? It appears that the plug dictates the gap...not the vehicle. Correct?

 

.44 would be almost half an inch, but I'm sure you know its not that much.. .043 is fac. setting , i pulled one of mine yesterday & its plug time , my gap is about .062 ... electrode looks like a baked sewing needle , not abnormal, just very worn..

 

Aaaah, so I should probably cancel the hit I put out on Joe Meyers Toyota for installing my last set of plugs (when I blew the previous 2.7) with a .75 gap! I didn't realize that the nubby thingy (sorry to get so technical) melts away after years of abuse. Mine were .75, .72, .70 and .65 when I pulled them out the other day before replacing them.

I'm going to go ahead and scrap these and go with the factory recommended plugs as suggested then. Gracias!