jjsvmax

i am a first time lexus owner and my 95 sc400 runs smooth untill i punch it and then it starts to buck and almost like its losing power. it has 145000 miles and i have had it 3 days . any ideas?

jadu

iTrader: (42)

fuel pump, fuel filter maybe?

jjsvmax

where is the fuel filter located?

CrazySC300

iTrader: (16)

Behind the driver's side rear wheel.

jjsvmax

under the car or in the trunk , i dont see it

BostonSC4

iTrader: (2)

Under the car. Directly behind the driver side rear wheel its a black cylinder with a small metal clamp around it. PITA to change. My SC is going to the shop tomorrow for it.

ZPEED

first thing to do check the battery voltages with running engine.

jjsvmax

with engine running and nothing on the voltage is 13.7. im starting to think its a fuel delivery problem. that dang filter is really hard to undo the nuts.

brawls43

iTrader: (1)

Does run smooth until about 3000-3500rpm? Timing belt may have jumped a tooth if your tensioner got loosened up. You can hand line up the timing marks on the crank and cams to check this.

BostonSC4

iTrader: (2)

Ignition coil pack.

CSSC400STL

try your coils pack mine did the same at 3500 and as soon as i changed it i got my power back. or fuel filter which is a pita to change cause i bought mine from someone and it never was changed so it rusted on there

jjsvmax

well after totally mangling my fuel filter and having to cut the lines and adding rubber fuel line with the filter, and checking everything under the hood .i pulled the plugs and cleaned them and the caps and rotors, but it still missed and ran like sh*% . so i decided to put new plugs and wires, which btw are a pain to change. the car runs great.. thanks for all of your help..