cylider misfire eating plugs up

i put a 3.4" pully on my 98 riviera and when i get the rpms up i get a cylinder misfire on 1 or more i put new plugs wires cat and coil packs and its still eats up the ends of the plugs but only when the rpms go 5000 or higher??????

what plugs?? You need to scan an see what kinda knock your getting.

What kind of supporting mods do you have for that pulley... you should at least have a cooler range spark plug like autolite 104s and a 180 degree thermostat.

if you dont have a downpipe or a tune you would probably make more power on a 3.6 inch pulley ......... but with this cold air you may just luck out and you'll have yourself a FREE intercooler...........

where are you from??? whats the temps there because at 4*(temp outside) on a stock pulley i see 10 lbs of boost.......... with .01 degree's of KR......
which means if your stock you could have a bomb ticking under your hood man..

WE REALLY NEED TO KNOW YOUR MODS TO HELP YA MAN

i was running autolight double platinum app 606 and acdelco wires and a hi flow cat and my car always runs at just under 200 before and after everything on the moter is stock but the pully and it about 40oF or less out side its winter in syracuse.the car is burning off or mushing the tabs on the plugs and cracking them and it does not always happen to the same cylinders

mr.19982tone wrote:

i was running autolight double platinum app 606 and acdelco wires and a hi flow cat and my car always runs at just under 200 before and after everything on the moter is stock but the pully

OH MAN.............. well you really shouldn't drive it again until you get a tune and downpipe and rockers.......... thats a really small pulley to be on there.

OR you should really put a 3.6 inch pulley on........


what kind of gas do you run?

93 octane and the only code that come up is engine misfire and when i change the plugs the light goes off yeah there great !

Yeah those are factory heat range plugs and dual tipped platinum sounds like it might be a little hot... i highly reccomend a 180* tstat and autolite 104s at least... the plugs have a lesser insulator and will release heat better and hence forth probably wont melt... and a 3" in downpipe will probably help out a lot too...

ok go get ur auto light 104s advanced auto man, and get a FWI the 3800 CAI make it out of home depot pluming pipe and you should be good to go

whats the temp in syracuse in utica its like 24 right now

your burring up plugs becuase those are way too hot of a heat range to run more than stock boost. you NEED AL104 copper plugs to keep from changing out plugs weekly. also you SHOULD be running way cooler than 200* stock t-stat is 195* which is ok for normal driving but if your looking for a perofrmance edge or if you increase boost (heat) then you sould get a colder 180* t-stat. please read the series II FAQ and mod section before you do permanent damage to your engine!
have you scanned then engine with that 3.4" on there?

yes i did scan it with the 3.4 pully nothing there until the plugs mess up and then thats it.too late i just put acdelco iridium plugs

ok so tomorrow go to advanced auto, then them you want 6 autolight 140 plugs in COPPER and a stant 180* thermostat , it should come out to like 17.60 something but then you should be running fine

Yeah what corey said... AL104s and180 tsat will more than likely solve your problem.

TonySmooth89 wrote:

Yeah what corey said... AL104s and180 tsat will more than likely solve your problem.

Sorry dude.......... 3.4 ONLY SUPPORTED by 104's and a 180* t stat WILL NOT fix anything............... WAYY TO small of a pulley man...........

ZZP reccomends a 3.5" on a stock motor... this is referring to the w-body cars which have u-bends in the exhaust...ours dont... they say a 3.4" pulley will work on a car with a CAI , some exhaust work and cooler plugs and tsat...while just those two alone might not be ideal to run a 3.4" pulley...it is possible... and if you look in the riv modding guide it doesnt mention needing exhaust before a 3.4" pulley... so he shouldnt have too much of a problem with cooler plugs and with the cold temps...but before it warms up he should get a at least a 3 in downpipe...and if he hasnt already gut the airbox.

just gutted the air box 20min ago

good... then just add the plugs and tsat and get a downpipe or headers ( depending on how far you plan on taking the car ) before it starts getting hot and you should be fine. not perfect... but perfectly driveable

and if you wanna be really safe go with a 3.5" pulley.

3.4 inch pulley on a stock motor is the DEVIL......... im just warning ya........ escpecially with colder temps cus you boost 25-35% more DEPENDING ON TEMPS that theory was made by me at 10*....................

Did it eat plugs before you put the 3.4" SC pulley on?

Are you scanning during WOT and seeing zero KR the whole time?

AA wrote:

Did it eat plugs before you put the 3.4" SC pulley on?

lol...good question...

not meaning to go off topic but how are you making 10 psi stock travis

Colder air is denser. Higher PSI in the winter.

RhinoFLA wrote:

not meaning to go off topic but how are you making 10 psi stock travis

when it gets colder its like a free pulley drop............ so BOOYA haha jk........ come up here with the riv it'll be funn