Low On Power After Tune

[32vspec2gtr]

How long has the fuel been in the tank? As fuel ages it loses its octane rating (knock resistance), so old fuel = knocking.

When was the fuel filter last changed? If its creating too much restriction = less fuel pressure = less fuel in = more knocking/leaning out

Also, check that your fuel pump is getting the full 12v supply as the standard wiring doesn't allow the bigger fuel pumps to get the full 12v due to the amount of power they use compared to standard.

If it was a slight miss fire I think you should be able to feel it in the car or on the dyno as it maybe hesitant or pop through the exhaust. Even if its slight

But gap your plugs, standard gtrs run 1.1mm gap but if you increase boost it tends to blow the spark out. So i run .8mm gap on mine, but check what other people are doing on gts

Someone said before about the blow off valve and leaks, i don't think this would be an issue as if anything it would run rich and you maybe able hear the leak. Shouldn't detonate, even though it would be low on power because its rich not lean.

What Fmic are you running? if its a cheap item, maybe its not cooling the air sufficently. Which also causes knocking.

I don't think timing is going to be the issue of why you haven't increased power, as you still should be able to, to some extent. Most likely I think its going to be fuel system related.

Anyway, just my 2c of ideas to check

Hope this helps

Matt

[Chi100188]

the frontmount intercooler has been working perfectly , fuel pump is getting constant 12v power supply, there is no missfire, the blow off valve is a HKS SSQv it doesn't leak, the issue is i can't increase the timing to extract more power...so there is no point running more boost....the issue is not within the exhaust, metal intake pipe or even the front mount intercooler all joins are new and tightened there was no boost leak what so ever....i was talking to a mechanic mate and he told me if the cam timing was off by one tooth you'd lose power or something.

Cheers

Chi

[JonnoHR31]

yep cam timing can do it. pull the top cover off and check it.

where in perth are you located? might be able to help you out

[GDZ-14R]

Very similar issue here, valve float has been suggested as a possible cause by my tuner. I will further investigate before diving that deep again, ill let you know what it turns out to be in my case.

[zebra]

the frontmount intercooler has been working perfectly ,

Cheers

Chi

What intercooler is it, a good one or an ebay pos?

[Chi100188]

the intercooler is china but i've been using it without problems 4 years ago.....