Low Power After 3000rpm

[swordfish]

had low power and missing on acceleration: have replaced:

timing belt, idler brg,tensioner,

plugs

leads

distributor rotors

caps

w.pump

accesory drive belt and pulleys,

still chasing low power on acceleration after about 3-4000rpm.

full throttle gives acceleration to 3-4000rpm, then it labours and wont go over 5000 till u bak off and then it changes up and accelerates till the same again occurs.

On scanning, no codes appear.

any ideas guys???/

[chips229]

Hi and Welcome to the LOC.

Maybe have a look at the fuel filter sounds like its not getting enough fuel,also check the air filter.

[swordfish]

changed fuel filter and air filter is ok.

also put two new cats on.

[chips229]

Maybe try posting this topic on the US forum they might be able to help you,sorry dont know what else it could be.

http://us.lexusownersclub.com/forums/

Let us know if you find a fix.

Cheers chips.

[star a]

had low power and missing on acceleration: have replaced:

timing belt, idler brg,tensioner,

plugs

leads

distributor rotors

caps

w.pump

accesory drive belt and pulleys,

still chasing low power on acceleration after about 3-4000rpm.

full throttle gives acceleration to 3-4000rpm, then it labours and wont go over 5000 till u bak off and then it changes up and accelerates till the same again occurs.

On scanning, no codes appear.

any ideas guys???/

←

throttle position sensor or dirty throttle body or

, poss ECU probs.