onetufbrik

My 92 LS400 failed emissions. Bummer. I've taken it to a local mechanic (S. sub of Chicago) who is suggesting the following:
Injection cleaner - $130
ERG valve replacement (Engine light is lit) - never been changed - $210
Sludge (I'm guessing carbon deposits) removal from manifold - $300
All O2 sensors - 3 are bad - $700 (parts & labor)
Both Cat's - ($350 ea. aftermarket)
The car has 165k miles and runs great. I was considering having the cats and EGR valve replaced with removal of the carbon deposits from the manifold. I wanted to do the O2 sensors myself.
Does this seem right to the group for emissions work?
Emission results:
HC (GPM) - 1.36
CO (GPM) - 25.9
CO2 (GPM) - 451.5
NO (GPM) - N/A

Need your help! Thanks

LexLS

Here's where you can get some O2 sensors http://oxygensensors.com, and if you install them yourself you'll save a lot of money. I haven't yet, but will be ordering from that site sometime soon. They sell a universal one that works fine I've been told, you just need to splice the wires. I don't know about the other stuff on your list.

ychachad

Too much $$$. In my experience:
O2 sensors, both, $520, Lexus Dealership
7 Injectors cleaned, 1 replaced, $170, Lexus Dealership

dunn378

i would'nt replace all that stuff. whatever the engine light is on for replace that and see if you pass after that.

RA40

iTrader: (6)

Can you post the results of your emission test? That would give us a lead as to what needs fixing. Hard to believe all those items are bad unless they have been fouled by nasty contaminents: leaded gas, oil...

onetufbrik

Just got back from getting my LS400 testing for emissions again. This time...
PASS

Work done:
Fuel Injector Cleaner
Replace EGR valve
Total = $400

Thanks for everyone input!

Final emission results:
HC - 0.460
CO - 3.899
CO2 - 349.000
NOx - 6.021

RA40

iTrader: (6)

Congrats on passing!

The EGR can muck things up and it is a simple fix. I've heard stories where mechanics will recommend replacing a boat load of stuff if they think they can pull it off.

unstephenk

How do you go about replacing the EGR valve and cleaning out the fuel injector? I would rather do that stuff myself then paying someone.

python

iTrader: (4)

i thought u said 3 02's were bad? also the 02's behind the cat dont do anything but tell the computer how the cats are doing....something dont seem right here

MEANDAFAKA

^i agree, just a bit iffy