Question about 1995 Lexus Sc 400
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Posted on Jan 02, 2017
The MAF is on the Air Intake above the air filter box and screwed into the plastic tube heading toward the throttle body. It is the 2" by 2" plastic protrution from the air intake tube. There should be two philips screws holding this in. Remove the two screws and back the entire MAF out. There is a wire harness connected, unclip this to remove completely.
If you have money burning a hole in your pocket, go ahead and purchase another MAF for a few hundred clams, or you can spend about $10 and clean it. It's made out of titanium and I doubt it will fail in 10 years. But sometime it does happen.
Go to Lowes, or Home Depot and buy Electronic Cleaner in a spray can. If you look inside the sensor, there is a heated wire, and behind that is another wire which picks up the oxidized air.
Stick the tube which is attached to the electronics cleaner spray can into the cavity where these wires are seen. Continue to spray most of the can onto these wires to remove oxidation build up from the wires. Let it evaporate for a few minutes then hit it again.
Allow the assembly to evaporate complete for about an hour.
In the mean time, take some throttle body cleaner and spray out the throttle body with the valve open. Keep open to let it dry out quicker and clean up the black crud that come out.
Keep you air filter replaced.
Put everything back together and you should be good to go.
Posted on Mar 16, 2009
SOURCE: Check engine light is on
no such thing as a catalytic computer... there is a catalytic converter ... part of the exhaust system so they may now be "guessing" that it's an O2 sensor. take the car to autozone... they will scan the codes for free.... post the codes here tho the lads and lasses there are pretty clever and will probably tell you what the codes mean.
Posted on Apr 16, 2009
Check the MAF sensor, If this malfunction, the computer cannot determine how much air is going into the engine so it can't determine how much fuel to put in there. Also a bad coil, or any part of the ignition system can cause this.
Posted on Aug 05, 2009
You missed two spots.
EGR air passage tube
EGR base gasket
The air passage tube get clogged with carbon just like the base of the EGR valve.
It's ten time worst!!!
Get a full bottle of SeaFoam,WD-40 and a snake/wire to clear out this passage.
A home vacuum clean will help speed up the job.
DO NOT forget to get a new EGR base gasket.
Posted on Aug 31, 2009
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