4AGZE Losing boost - Toyota Nation Forum : Toyota Car and Truck Forums

VBAE92GTZ · 03-11-2007, 12:57 PM

I put the ZE engine in about 2 years ago, and put a HKS pulley on it. It had about 30k miles on it. It boosted at about 11-12 psi, but now its between 8-9 psi. With about 50k miles on it. Ive tighten and replaced belts, checked couplings and clamps, and replaced the S/C oil. Whats the life of the S/C? Is this a common problem? Or is there something I'm missing?

ToyotaTechGeek · 03-11-2007, 09:27 PM

i'm not sure exactly, but i would begin to suspect the ABV itself. i have had the same problem, and i am chasing-down the same demon currently. luckily i have an extra SC. and i also have other projects to finish, so i will post on my dismally slow progress.

ToyotaTechGeek · 03-13-2007, 11:40 AM

also, try powering your ecu down for an hour. see if a reset does anything.

VBAE92GTZ · 03-13-2007, 04:02 PM

Its not running off the stock ECU. And its not run off manifold pressure. Its on a programmable TPS. I hope its something stupid and easy to fix. The supercharger on the AE92 setups are a mofo to remove.

toyotaspeed90 · 03-13-2007, 05:55 PM

yikes... running alpha-n on a gze with a manifold.... weird