Check the efi computer for error codes.
Sudden losses in power for no apparent reason are often caused by the computer running in 'limp mode' due to a faulty sensor.
How to do it varies, but it's effectively finding the diagnostics plug under the bonnet and shorting the T and E1 or the T1 and E1 or whatever your motor has.
Then you turn the key to the on position and look at the Check engine warning light in the dash.
It should flash in a certain sequence. http://www.off-road.com/toyota/tech/codes/
If it flashes continuously, there's no probs.
If you get some codes, that tells you where to look.
Another possibility is that the catalytic converter has broken internally and caused a blockage. That wouldnt show a code, but it would explain both the loss in power and the weird change in boost buildup.
Cant hurt to double check the cam timings either.
Since your last work was the head gasket, it's possible that you or whoever did it, accidently got the cams off by a tooth.
Sun, 09 October 2005 10:43
