Power Cuts AGAIN. Pls Help

[EnricoPalazzo]

Hey guys, I need help with a re-occuring problem that has been plaging me for a while now. It all started when i added an exhaust side cam gear to my r33 and a retune of my unichip. The car made 210rwkws, up from 195 it previously had without cam gear. But then a few days later, the car started to run terriblely. I would accelerate and I could feel the power going up and down. I had it re dynoed at a Dyno day where this proved my concern showing only 200rwkws, but the power curve was terrible goin up and down +-15rwkws all the way to redline. So i thought it was AFM maxing out, hence pulling timing as Unichip still retains stock ecu.

I measured AFM voltage while going for a drive, indeed it was maxed out, 5.05v. So i turned down boost from 14psi to 11psi. The car ran a bit better, but was still running crap comared to when it was tuned at 195 with 14psi (ie without cam gear).

This was about 2 months ago, and since then the car has gotten progressively worse. The car has developed a power jerk cut out running only 11psi. This has never happened, even when running at 14psi and 195kws. I assume the car is makin alot less now cos it feels terrible, like the engine doesnt wanting to rev out. So thinkin it was an bad tune with the ECU, i pulled out the Unichip, and reset the stock ecu.

Then i went for a burn, the car felt good at 8psi. a lot stronger then what it did with 11psi and Unichip. But then 1 day after this, the car is developing the power cut out agian at 11psi. I have no idea whats happening. The stock ECU never ever did this sort of thing before so why now. The car also feels that it has gotten progressively worse since resetting it.

Im at the point of being so frustrated. Is it somethint to do with the camgear. Its set to -3deg, but since being installed is nothin but trouble. Also the problems started after the tuner changed by iridium plugs to platnium and gapped at 0.7mm. I have also changed them back to Copper NGks at 0.8mms and the car is still the same.

Any suggestions that could help me would be appreciated. Like i said the car has never been like this before, so i have no idea where to start.

THanks in advanced.

Dean

[knore]

Well if it was fine WITH the camgear on the dyno and the first few days or whatever then it can only be 3 things;

Cam gear has moved setting

ECU is stuffing with things

Or something has broken

[TTT]

clutching at straws here but...

fuel pump/filter/injectors???

the jerking back and forth you are talking about sounds similar to what I have experienced in the past...

[EnricoPalazzo]

Hmm thanks for your responce, however I think i have an aftermarket fuel pump. Ill check tonight to make sure.

Anyone else have any ideas?

[Steve]

around 11psi eh? boost cut perhaps, try dropping the boost to 10spi and see if it gets better. Oh, and buy a power fc:p

[EnricoPalazzo]

im waiting for urs