Po300 Multiple Misfire Cylinders
#1
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Location: Hialeah, FL
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Po300 Multiple Misfire Cylinders
Well, my har has been in the shop for more than 30 days now.
having a multiple misfire cylinder code since I installed the turbo since 8 months ago, the car was taken to the shop because it blew a gasket for the turbo (i have greddy twin turbo) but the mechanic doesnt want to replace the bad gasket until he discovers or fixes whatever is causing the multiple misfire cylinders... i have changed the injectors 2 times already with the greddy ones used to be the same thing, the tunner told methat i had bad injectors without actually checking or flushing them (the greddy ones) (*the kit was used*) ok so i told him to replace them and I bought 550cc (this was 6 months ago) and still today i have the multiple misfire cylinders,i have change the spark plugs 4 times!!! because always they get wet with gas, the mechanic the other day took off one of the coils and told me that needed to be replaced because it had like a line or something like that trough it well i did order a new one from nissan, still does the same thing....i sent the injectors to a shop to check them ( the guy said one of the injectors *just one* is throwing 5 or 6 cc more above so from 550cc that i have this one will be throwing 556cc) i went to nissan to talk to a tech a hundred or more by hour to check the car (mine is not covered by any warranty anymore), any advise or should i sell this car? i'l be online just waiting for answers, thanks in advance.
350z yr:2004
3.5 ltrs
greddy twin turbo kit
denso iridium spark plus
(stock internals)
(car has been always running rich)
too much money spent on tunning and never got the car running well because of the misfire code
(i'l be buying full suspension kit when i fix this issue)
(always runing on low boost * 6 psi *
i'm in south florida by hialeah or miami just in case.
having a multiple misfire cylinder code since I installed the turbo since 8 months ago, the car was taken to the shop because it blew a gasket for the turbo (i have greddy twin turbo) but the mechanic doesnt want to replace the bad gasket until he discovers or fixes whatever is causing the multiple misfire cylinders... i have changed the injectors 2 times already with the greddy ones used to be the same thing, the tunner told methat i had bad injectors without actually checking or flushing them (the greddy ones) (*the kit was used*) ok so i told him to replace them and I bought 550cc (this was 6 months ago) and still today i have the multiple misfire cylinders,i have change the spark plugs 4 times!!! because always they get wet with gas, the mechanic the other day took off one of the coils and told me that needed to be replaced because it had like a line or something like that trough it well i did order a new one from nissan, still does the same thing....i sent the injectors to a shop to check them ( the guy said one of the injectors *just one* is throwing 5 or 6 cc more above so from 550cc that i have this one will be throwing 556cc) i went to nissan to talk to a tech a hundred or more by hour to check the car (mine is not covered by any warranty anymore), any advise or should i sell this car? i'l be online just waiting for answers, thanks in advance.
350z yr:2004
3.5 ltrs
greddy twin turbo kit
denso iridium spark plus
(stock internals)
(car has been always running rich)
too much money spent on tunning and never got the car running well because of the misfire code
(i'l be buying full suspension kit when i fix this issue)
(always runing on low boost * 6 psi *
i'm in south florida by hialeah or miami just in case.
#3
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Join Date: Jul 2007
Location: Philadelphia, PA
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There's not much anyone can tell you over the internet that your mechanic shouldn't have been able to find/check after 30 days. I would take it to a tuner shop that may know a little bit more about your turbo setup. Good luck.
#6
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iTrader: (1)
did u find a fix to this yet? Check ur valve seals, or coil packs.. if ur spark plugs are wet wit oil, the seals are done in the valve covers or the coil packs need to be replaced... Either issues will cause mutliple misfire, it has happened to me before as well.. good luck
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