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View Full Version : sr20 idles rough and misfires around 5k


mn_silvia
09-29-2009, 07:04 AM
k so i start it up and it sits at a high rev the as i getts to opperating temp it falls on its face and starts lobing anywhere from 200 ot 1200 rpm but thats only on inital start up till i drive it only after operating temp...

thats problem number one

so after i start driving first gear pulls like a bat outa hell then slam second and then right around 13-15 psi she cuts up and it seems to spark cut its not lean popping she runs pig rich i have changed my plugs 3 times in the past month are i have them gapped to .020 so the gap its tiny 3rd 4th and 5th all do the same thing

VACUM IS GOOD

COMPRESSION IS GOOD

TUNE RUNS FAT(RICH) BUT IT NEEDS TO BE

SPARK KEEPS FOULING BUT EVEN DOES IT WITH NEW PLUGS


Power FC with controller unplugged
GT2871R .64AR Turbo
Peak Performance Turbo Manifold
Tial Wastegate 38mm
Megan Turbo Elbow
HKS down pipe
RSR Exhaust xmag
Blizt Boost Controler
Koyo Radiator
Samco Radiator Hoses
ARP Head Studs
HKS Head gasket
Greddy Intake Manifold (real)
HKS Top Feed Fuel Rail & 780CC Injectors
Greddy Intercooler
Blizt BOV
Aeromotive Fuel Pressure
Flex Fan
300ZX Maf
Blitz Air Filter
Greddy Hot Pipe







370 @ 1.3 bars aka 19 lbs

rsibley22
09-30-2009, 11:35 AM
maybe the coil packs aren't grounded well enough? i had some breakup/misfiring on my sr and it was because of an unsufficient ground. i just beefed up the grounding wires a bit to the coilpacks, head, and firewall and then no more breakup