95 ES300 rpm hunting around 1000rpm
 

At lift-off under load, engine starts hunting around 1000rpm in L, 2, D but not in R. Stall speed R approx 2200rpm, in forward gears hunts then bogs down to around 1500rpm. Checked TPS, MAF, no airleaks. Cannot understand why problem appears in forward but not reverse.
Any clues?

RE: 95 ES300 rpm hunting around 1000rpm
 

Found problem after checking every hose - air inlet hose had 1inch split on underside and groove of bellows that opened up under torque reaction in fwd, closed in reverse. Replaced hose and performance now perfect.