attzor

iTrader: (1)

I changed my oil today, I used quakerstate synthetic 10w30, after i finished, I took it for a quick cruise, and when I let it get into boost in 2nd, it got up to 4900-5100 rpm and sounded like it was hitting a rev limiter, like it was in neutral, very loud and not making any power. I orginally had it at 18lbs, then I dropped it to waste gate, which I think is 10-12 psi, and it still did it. The afr was higher than normal as well, it was 15+. I'm not sure which way is lean and which was is rich on the AEM AFR guage, so I'm not sure if it's running lean or rich.

Any help is greatly appreciated.

turbodremz

iTrader: (18)

15+ is wayy to lean when under boost..under boost you want 11.5 or lower to be safe.

high numbers = lean
low numbers = rich

sounds like a boost leak too me, start checking all your clamps, couplers, and vacuum lines then go from there..

attzor

iTrader: (1)

Under boost its lower in the 12.0-12.5 range, I need a tune, but the boost/vac leak sounds plausable because i was thinking that the boost gauge was busted because it wasnt moving at all, I'll go tighten everything up

attzor

iTrader: (1)

Tightened everything, still acts like a few cut, but makes boost much quicker now, definatly was some leaks, probably still some more where the elbow from the turbo meets, its a bit dented by the clamp. Anyone have anymore ideas? It wasn't doing this before I changed the oil, did I use the wrong oil? I used synthetic Quaker state 10w30. Its a 1jz aswell.