sr20det power loss

[brent]

The car is an 89 240sx, with a sr20det that I swapped in a couple months ago. Recently it seems like it loses power when boosting. Its most noticable in 2nd gear, but is happening in all gears. If I accelerate fully, the engine pulls hard for the first approx. 1000 rpm until I start getting boost, then it feels like I'm trying to push a school bus. I still accelerates, but not as hard as it should. It has a new fuel filter, engine oil and filter, air filter and is running stock boost. On the exhaust side it has a 3" downpipe, no cat and 3" exhaust all the way back. Any one have this problem before? There doesn't seem to be any boost leaks (at least not that I can find)

[EZcheese15]

Is oil getting past the turbo?

Also, check to see if it's leaking at any of the turbo gaskets, such as the gasket between the turbo and manifold.

Do you have a boost gauge? Are you hitting peak boost like you should? What kind of boost readings are you getting throughout the power band?

[brent]

Boost is peaking just like it should, its hitting 7 psi by about 3000 rpm and boost readings look fine throughout the power band, there are no signs of an oil or exhaust leaks

[EZcheese15]

Is it possible you are misfiring at higher rpms? What plug gap are you running? Maybe try gapping them a little bit closer.

[brent]

I was going to go with a colder plug anyways, so I'll close the gap a little too