Ls400 Engine problem

[slipway NZ]

Happened the other day, engine loses all guts at full throttle, feels like running out of gas,
Part throttle runs fine, as soon as you stab it engine revs increase to about 3k then drops tp 1.5k and sits there reving from 1- 1.5k up and down.

I did the fault coses on diagnostics and its came up 41, i looked that up and it said tps prob so swapped that and still same problem.

Them problem will happen most of the time and then seems to clear for abit, any ideas guys?
abit of a shitty explanation but hope you get it

[brett_celicacoupe]

sounds like the IDL circuit is staying closed on the TPS

if it happens again then disconnect the TPS altogether and see what happens.

it will probably make the ECU have a cry about no TPS signal but it should stop the revving problem.

[Lex400]

If you haven't done so already, you should try disconnecting the battery for a few minutes. This should reset the computer. Not sure if this will work or not but it doesn't hurt to try.