i've got the gm supercharger with the 3.0 pulley full exhaust and a greddy e-manage unit so i have a good tune.... new spark plugs but for some reason MOST of the time (8 out of 10) after my car gets above 4500rpm it starts to misfire.... not like a drastic misfire but you can def feel it and even hear it..... its the worst when i'm trying to downshift to..... i'm really confused on what the problem is.... its been tuned and i changed spark plugs to the ones recommended for supercharged behicles ... if anyone's been through this or knows what the problem could be PLEASE let me know...
go get some 100+ octane gas and go from there even just two gallons from an empty tank
ASE Master Certified Automotive Technician
Me and BlueDeuce have the same problem, I think this has to do with your AFR, check your wideband. I get 10 at idle and 12.5 in boost.
myne used to break up i took out my sparkplugs and regapped em to 28/30 across the board....no more misfire....i had TR6's...they were gapped at 35 off the shelf....
you scratch my ride IMA EAT YO CHILDREN
well mine are gapped the same as a cobalt ss..... what spark plugs are you runnin 16 valves????? i'll buy them and gap them identical to yours..... lol and hope that works.....
sunfiresam... havent installed my wideband afr yet but when i do i want it at the same your runnin???? if not what do i want it at??? so i can tune it to that
NGK TR6's.....i forget the part number
you scratch my ride IMA EAT YO CHILDREN
i know this is going to be a stuipd question.... but what is gapped 28/30 across the board mean???? lol
get a gapping tool....looks like a quarter.....and push down the bar to the diode or watever.....then regap the plug with that tool....and the tool u just spin it till it reaches 30 .....now with mine i did them quick so i just went between 28 and 30 in that range on all 4 plugs(across the board)
you scratch my ride IMA EAT YO CHILDREN
Hmmm...I have mine gapped at .34 (TR6s)
Maybe I'll gap them all down to .28 and see if I have the misfire still? I knw they need to be gapped closer to reduce spark blowout but .28 seems a little too much? I'll try that in the morning and then clear my CEL and see if it comes back?
Eh...old man with a Corvette now...it was bound to happen sooner rather than later right?
right now with a 28/30 gap at 7 psi i have yet to miss(untuned to add to it)...ive been to 10 psi and started to miss at luike 4500ish....but untuned thats pretty damn good
you scratch my ride IMA EAT YO CHILDREN
just get as close to 30 as u can
you scratch my ride IMA EAT YO CHILDREN
will do!!!! now i just gotta find the damn ngk tr6's!!! lol
cobaltKILLA wrote:will do!!!! now i just gotta find the damn ngk tr6's!!! lol
www.sparkplugs.com
pretty cheap and shipping is fast!
Eh...old man with a Corvette now...it was bound to happen sooner rather than later right?
SWEET THANKS BLUE DEUCE!!!
