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Popping Noise From Exhaust

Scratch

By Scratch,
in General Maintenance

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Scratch

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Found the problem, after ordering o2 sensors (x2 for gtr's). Got the car on to a four wheel dyno and found out my ECU was chipped (suprise, suprise) as datascan wouldnt connect to it. Started a dyno run and the car was flooding the engine with so much fuel it was CRAZY. Eventually the tuner diagnosed that the knock sensor was cause, turned the crank angle sensor all the way and the engine didnt ping at all... meaning it was running on limp mode (apparently when the ECU cant detect the knock sensor it automatically goes into damage control mode and disregards all timing, plus floods the engine with fuel). Have a Power FC on the way, hopefully i get the GTR back on its feet. Thanks to everyone that helped with this topic!

Go SAU!

  • 1 year later...
bumble_bee Rising Star

bumble_bee

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Found the problem, after ordering o2 sensors (x2 for gtr's). Got the car on to a four wheel dyno and found out my ECU was chipped (suprise, suprise) as datascan wouldnt connect to it. Started a dyno run and the car was flooding the engine with so much fuel it was CRAZY. Eventually the tuner diagnosed that the knock sensor was cause, turned the crank angle sensor all the way and the engine didnt ping at all... meaning it was running on limp mode (apparently when the ECU cant detect the knock sensor it automatically goes into damage control mode and disregards all timing, plus floods the engine with fuel). Have a Power FC on the way, hopefully i get the GTR back on its feet. Thanks to everyone that helped with this topic!

Go SAU!

yeah, i had pretty much the same problem as you Scratch..

my dump o2 sensor died after getting my car tuned for my new afc NEO, for the first time,

must have have over-done-it at ovaboost..

or they didnt tune it correctly..

because like 2 days later my car went into limp mode...

fine 1 sec and then, boom nothing...couldnt rev past lik 2500/3000rpm...so bad :|

so i ended up reseting my tuned afc to drive..lol

but i took it too a different tuner this time(speedworks) and they tuned it up nicely =)

i get round 400-500k's trashing tank, and highway/city traffic driving too...

so yeah

i recommend and apexi a/f controller for those getting bad fuel eco,....

but yeah, i want a power fc too...should solve all problems...

Edited by bumble_bee

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