ok here goes, threw a cell for high rpm idle system, after searching some reccomended to change spark plugs, so i get 4 brand new bosh platinum 4's, start the car and it runs and idles better then before, only problem is right around 5,000 rpm, 14psi, the car spuuters really bad, what the hell is wrong?

 

TUNE TUNE TUNE TUNE fuel cut or boost cut one or other

 

i forgot to mention i did reset the ecu to get rid of the cell and immediately drove afterwords, could that account for the air/fuel mixtures not being set yet, causing it to run like poopy?

 

Those are the plugs with the 4 ground straps right?

They suck. Throw those away and get some decent plugs with just one ground strap. I happen to like Denso Iriduims but, there are others that are as good.

 

Plugs gapped wrong will cause sputtering at high rpms. I had mine gapped at .026 these were brand new and it sputtered at about 5500-5700. regapped to .022 and no more sputtering.

 

so its prolly the plugs then, damn i just bought these like 20 min ago, im just confused my car is bone stock, the old plugs looked horrible, so i replace them with brand new ones and now my car sputters

 

the plugs require no gapping

 

Put NGK BPR7ES thats the problem

.25 gap

 

alright ill try those out, what seems to be the best spark plug for the money?

 

Don't bother reading the propaganda they print on the box. Those plugs are the worst pieces of crap I've ever seen. They would miss terribly in my 240sx that was still NA.

 

yea just another newbie mistake shoulda searched first

 

correct gap is .026. alot of people have had good luck with the ngk bpr7es gapped at .026. dont just take them out of the box and put them in, correctly verify the gap and adjust as needed. they should be changed every other oil change

 

same prob with me but at full boost, turned down the boost back to stock and i still have the sputter, but i blame mine on a leak due to new fmic lol