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After 6 Months Storage, Car Won't Rev Passed 2K

nakuma

By nakuma,
in Engines & Forced Induction

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nakuma Enthusiast

nakuma

Posted
Posted

Hey guys,

After leaving the skyline in storage for about half a year I have been trying to get it running happily again but I've run into a few issues.

When started, the car idles fine. When the throttle is increased it won't climb any higher than 2k and then a loud popping sound is heard coming from the pod filter, like the car is back firing. The popping occurs roughly every 5 seconds and is quite loud.

When the throttle is blipped it will rev freely all the way to redline but it will only rev to 2k when the throttle is opening incrementally.

I changed the fuel, fuel filter, spark plugs thinking it was air/fuel related but the issue remains.

The car has no smoke emitting from the exhaust or anywhere in the engine bay.

I read a few similar issues on the forums that point to the AFM but the powerfc shows increasing voltage from the AFM as throttle is increased. The AFM was previously relocated to after the cooler if that makes a difference.

Car has: PowerFC, 4" pod to HKS 2835, cooler to z32 AFM, nismo fuel pump, nismo 720cc injectors, splitfire coils.

The battery has been disconnected for the duration of storage too, so is it possible that tune has been wiped from the ECU?

Any other ideas what the issue could be and how to fix it?

I just want to get it drivable so I can drop it off at chasers and get it 100% again.

Bitsushiti Contributor

Bitsushiti

Posted
Posted

Suspect throttle position sensor (TPS)? You can check TPS voltage with your PFC commander under ETC -> Sensor check (with ignition on - don't need to start engine)

Voltage should be 0.5v throttle closed, 4.5v throttle open.

nakuma Enthusiast

nakuma

Posted
  • Author
Posted

Fuel is a few weeks old

TPS is reading 0.36v closed 4.08v open

Ok, I just tried to bridge the diag plug to get some error codes and now the issue has vanished! Maybe the ECU was stuck in a limp mode and that reset it. Just took her for a squirt and its 100% again.

paulr33 Grand Master

paulr33

Posted
Posted

that makes no sense

the diag port goes nowhere when you use the powerfc

the powerfc doesnt run normal ECCS diag so the port is useless, if you want diag look at ETC, SENSOR SW CHECK

AngryRB Grand Master

AngryRB

Posted
Posted (edited)

Hey guys,

After leaving the skyline in storage for about half a year I have been trying to get it running happily again but I've run into a few issues.

When started, the car idles fine. When the throttle is increased it won't climb any higher than 2k and then a loud popping sound is heard coming from the pod filter, like the car is back firing. The popping occurs roughly every 5 seconds and is quite loud.

When the throttle is blipped it will rev freely all the way to redline but it will only rev to 2k when the throttle is opening incrementally.

I changed the fuel, fuel filter, spark plugs thinking it was air/fuel related but the issue remains.

The car has no smoke emitting from the exhaust or anywhere in the engine bay.

I read a few similar issues on the forums that point to the AFM but the powerfc shows increasing voltage from the AFM as throttle is increased. The AFM was previously relocated to after the cooler if that makes a difference.

Car has: PowerFC, 4" pod to HKS 2835, cooler to z32 AFM, nismo fuel pump, nismo 720cc injectors, splitfire coils.

The battery has been disconnected for the duration of storage too, so is it possible that tune has been wiped from the ECU?

Any other ideas what the issue could be and how to fix it?

I just want to get it drivable so I can drop it off at chasers and get it 100% again.

my idea is the injectors, maybe there a bit blocked up after so long leading to some lean running? sounds like how mine ran with simply not enough fuel, or fuel is stale.

Edited by AngryRBGTX
nakuma Enthusiast

nakuma

Posted
  • Author
Posted

that makes no sense

the diag port goes nowhere when you use the powerfc

the powerfc doesnt run normal ECCS diag so the port is useless, if you want diag look at ETC, SENSOR SW CHECK

You're right, that's what got my stumped

I have no idea why the issue resolved itself

All the sensors showed the expected voltage

I thought it would be shit fuel too, but when it fired up yesterday there were no issues at all.

I thought if I took it for a spin I would atleast get a little knock from the fuel but it never went above 19

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