R34 Gtt Surging On Boost

[bloody Hoon]

Hey guys I have a 34 gtt that has a hi flow turbo and a walbro 550 fuel pump intank,

When the car just starts to come onto boost it surges like it's running out if fuel an if you

Give it a bit more throttle it starts to ping. As far as I know the fuel is connected properly

I adjusted the cam timing back to where it looked like it was originally (it had been marked

So someone has stuffed around with it before) an it didn't make a difference. Any help would

Be great in trying to further it out, if I can't figure it out will just have to take it to a dyno

Next week an see what they say.

[bloody Hoon]

An it was a auto but just converted it to manual, was doing the same thing with the auto to

[Don Dada]

What ecu?

[bloody Hoon]

The auto ecu but it was still doing it when it had the auto box in

[boostn0199]

Usual thingd to check the cas and afm but yeah on a dyno will help diagnosing.

[Don Dada]

The stock turbo is capable of sending the ecu into protect mode far less for a high flow turbo

When did the problem start? after the installation of the highflow?

If not it will most likely to be something to do with the fuel system as u say it pings with more throttle......U know the difference between pinging and a misfire right?

[DVS JEZ]

U know the difference between pinging and a misfire right?

+1

[bloody Hoon]

The stock turbo is capable of sending the ecu into protect mode far less for a high flow turbo

When did the problem start? after the installation of the highflow?

If not it will most likely to be something to do with the fuel system as u say it pings with more throttle......U know the difference between pinging and a misfire right?

I found the problem the walbro pump was just connected to the standed Fuel pump wiring which didn't have enough voltage going through it. I did the fuel pump rewire that was posted up here by 369, an it fixing the surging......it's getting the fuel it needs now.

An yes I do know the difference between pinging an missfire.......so I also had to retard the timing abit which stopped the pinging, still taking it to get dyno tuned next week just to be safe.