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Attached is the Nistune Log fresh this morning along with the items that the dealer have changed. My Car studder and shivers between 1k-2k rpm no matter what gear it is. The problem partially went away after they changed the items like gasket , maf,o2 sensor, and seals. But it still happens and I cant pinpoint the problem, last time the car was serviced it took them two weeks before getting my car back. It is my daily and I cant really afford that long down time >_< . This just happens in that rpm range >_< usually happens when the car is cold and even when the operating temp is reach it still happens , but not as much.

sorry i guess the board dont like csv files and put it on mega.

https://mega.co.nz/#!SBklkCzb!ow2js3z8UwZTcmoz1LaLRC1dstauRNDMWzZxWqqee-E

post-117548-0-68930100-1425599837_thumb.jpg

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Get a good ECU for starters for a GTR.

Could be AFM's or harness.

new AFMs , ECU dont matter when it is in stock tune and the previous ECU is a chipped tune.

What spark plugs brand, heat range and gap are being run?

Have the coil packs been checked?

oem plugs , nissan dealer checked the coils.

its in gear, why would it be drive train ? it happens at a specific part of the revs. I can rev the engine in Neutral up to 5k drop it in gear and it would still sputter back down to 1-2k

Is this just in gear ?
could be looking at a drive train issue.

mine did this and while I was changing plugs and pissing off the 32 carbon tips on the coil spring I found both my black earth wires had been pinched and atleast half the wires had been severed (bad earth = weak spark) possibly got caught in the back of the coil cover. new coil pack harness for about 100 bucks is a good idea anyway as the original has been cooked to death.

yup, there is a trader on here somewhere who sells them.

just work your way back

copper plugs, correct head and gap
coil packs (there just old and should be replaced if not done so far)
coilpack loom, as stated.... cooked.
ignitor, also just old

just do the basics man, as you will have the sparkplugs out, do a simple compression test,

pull off rubber (usually crispy by now) vac hoses and check for cracks leaks,

check your fuel filter ect

so many threds on this kinda stuff..

i know your mechanic has checked them but really man there is only so much you can just check without replacing anyway.

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