drewbob

hello i am new to this site i was hoping to possibly get some positive influence on my current issues with my lexus es300 1995. any help is very much appreciated!

model ... 1995 es300

problems ...
loss of power ( cannot press the pedal to the floor while driving or the engine surges out. tries to down shift to speed up but no movement ) it is not a transmission isssue. i have to keep it under 3000 rpm while speeding up and driving or it will act as if it wants to die out or revs up and surges

if i sit in park and floor the gas pedal it will rev to 2500 or 3000 and pulse and have after fire / back fire although if i let the pedal up alittle it will rev up pretty much normally

PFB

With such symptoms, your check engine light should be on. or at least there should be some pending codes in memory.

You will need to read these codes using a code reader or scanner and determine what they are.

Phil

drewbob

code comes up as knock sensor signal too low ( p0325 ) &
( p0330 )

the original knock sensor was melted !

ive replaced knock sensors already ! and nothing

ive also replaced ...
fuel pump
fuel filter
fuel regulator
fuel injectors
air filter
battery & alt.
tps
vacuum lines and actuators
ive cleaned the intake with carb cleaner
ive checked for clogged cat
ive replaced intake gaskets

the car sat for 4 years before i recently bought it

PFB

The problem is probably due to the fact that you used aftermarket knock sensors. Am I right?

After market knock sensors seldom work properly on Lexus cars. You should also have replaced the knock sensor wiring harness at the same time.

Phil

drewbob

All of the parts were oem. although i did find the issue ...

it was a vacuum valve behind the throttle body. the valve went from the valve cover near the firewall to the vacuum valve and then to the throttle body

i was at u pull it feeling pretty hopeless when i noticed all these 1mz-fe engines were missing this vacuum valve behind the throttle body. my thought process was that if they have all been taken it might be a common part that went out. i tried it and it worked ! thank you very much

drewbob

now i have a code p0325 knock sensor signal too low! bank 1. would anyone recommend jumping my wires to bank 2 ?

95 lexus es300

DRACO A5OG

If OEM part, then you should have a warranty, take it back and replace it. Sometimes parts are defective out of the box.