AFM and Pod Filter

[brendanshort]

I have a feeling that my POD filter is the reason that I am having flat spot issues with my HSGR.

I believe that it is confusing the computer and causing both fuel cut (for no reason, no overboost etc) and the flat spot I am experiencing every now and again.

The flat spot happens 1 in 20 times I drive it. No issues with fuel or spark.

Any ideas?

 

[vr401]

Could you tell us all about your car. Upgrades, boost you're runing, etc.

 

[brendanshort]

Manual HSGR. Bit over 160000.km 2 3/4" exhaust from the turbo back with high flow cat. POD filter. Turbosmart 2 stage boost controller 10psi on low setting, 16psi on high.

 

[CDJ84]

Probably worth replacing your fuel filter as well.

 

[vr401]

Manual HSGR. Bit over 160000.km 2 3/4" exhaust from the turbo back with high flow cat. POD filter. Turbosmart 2 stage boost controller 10psi on low setting, 16psi on high.

Is it only happening under high boost when you're cruising and then hit it or just out of nowhere?
16psi is a bit high for stock ecu, it may knock and retard.

 

[brendanshort]

If I accelerate hard the car acts normally, it seems to mostly occur if im cruising and need to slow down for something, then try and get back up to speed there is just no power. It has also occured a couple of times when I have been going up a hill and need to accelerate harder to keep the car at speed. My boost gauge is showing correct boost pressure.

Hard to explain it! Sorry if that was a bit vague.

 

[vr401]

If I accelerate hard the car acts normally, it seems to mostly occur if im cruising and need to slow down for something, then try and get back up to speed there is just no power. It has also occured a couple of times when I have been going up a hill and need to accelerate harder to keep the car at speed. My boost gauge is showing correct boost pressure.

Hard to explain it! Sorry if that was a bit vague.

I don't know how good is your pod filter setup. If it's only a filter without cold air supplied to it then it could be that heat soak is the reason why is it doing it. I know that hsg is runing very high temp. under bonet for some reasons. Try to isolate the filter to suck cold air as much as posible or go back to stock setup with k&n stock replacement filter. 3500-4500 is hotest air into engine (turbo spooling up) plus any heat under the hood equals too hot inside cylinders and that creates knock wich cause ecu to retard.
If your problem doesn't happen under low boost then above could easy be your problem.

 

[brendanshort]

Organising cold air induction soon. Just a bit hard with limited space under the bonnet. Any have any pics on a good cold air setup?

 

[MattL]

Shoot me a call later, I might be have some bits here that you might be able to use