Where's the 02 sensor

[luisbe]

Ok, there it goes. My Vin says '94
(1GMDU06D3RT226248)

[LMP]

OK....my doubts were founded...yes, a '94 but this is not a 3.8...it is a 3.1
COnsequently, your code 32 is about the EGR valve....hidden on the intake manifold under the air filter on the 3.1...
ALso, this is a "throttle body injection"...not separate injectors for each cylinder. There are 2 injectors in the throttle body....physically comparable to the ancient carburator...
see that:
www.avigex.ca/xport/TBI.jpg

Still...I think a blocked injector in the TBI could explain your problem , that is, excessive fuel burn and poor idle and stall. THe EGR problem is accessory....

[luisbe]

So it makes sense replacing the spark plugs first, am I right?

[luisbe]

BTW As of yesterday my brake pedal went down to the bottom while driving. I pumped it and it brakes but some big trouble there. The only thing I've done so far is checking the reservoir but the level seems, strangely, normal.
This is another thread though, I know.
When I need the vehicle and the money is shrinking it happens.

[LMP]

Check for brake fluid leaks, front flex tubes can be suspected, but check all wheels.
There is no objection replacing the spark plugs..this is normal maintenance. Reaching the rear plugs from the top is easier on the 3.1....some remove the dogbone at the front and tilt the engine forward...
....

[luisbe]

Well, at least I borrowed 2 ramps.
I have to forget about the spark plugs right now, the other issue seems more serious since it holds me from driving the vehicle, which I need for working purposes.
I'm appealing to you LPM who are THE GUY; I've read several threads back but I couldn't get something that lightens me so I'll post my problem here but eventually should be re post on a new thread. In that case I will.
Four or five months ago I lost my break so I went to the shop where they fixed a damage line going to the front left wheel (driver side). A week later both lights (ABS and brake) went on together. The guy revised the lines but everything seemed OK (according to him) and told me: "come next week for that problem". Money dried so I did not go but I continued driving while the vehicle was braking fine until a couple of days ago with the commented trouble of the brake pedal sometimes going all the way down but not every time. That's the situation as of today.
I've just checked all lines for leaking under the vehicle without seeing nothing wrong.
You mentioned something about flex tubes that I don't understand what it is or where it is situated, is it possible to get a picture somewhere or a diagram?
Appreciate not only your time but your patience.

[luisbe]

BTW, the liquid in the reservoir continues at the normal fill despite of my pedaling several times looking for leaking.

[luisbe]

I took 2 pictures:
Picture 1: Is this the dogbone?
Picture 2: Is this the servo?

[LMP]

Yes, this is the dogbone..but as you say, spark plugs are not that urgent at this time.
The other picture is the brake master cylinder and ther ABS unit. From what you describe, I think some air has been left in the brake circuit. That gives a soft pedal that goes farther than normal. That also pops the brake lights ON. Clearing the air implies "bleeding" the brake lines and wheel brake cylinders. Quite often the bleeders get stuck and if one does not use patience, one (or several) can be broken and this will lead to changing the corresponding brake cylinder/caliper....meaning lots of $$.
The "flex" lines I mention are those flexible rubber lines that go to the front wheel calipers..one of them was changed , according to your post.

[luisbe]

Thank you.
It seems not too bad, at least for now.
Bleeding. I've been reading several threads regarding to, I understand there are 2 ways, is it so? One is the classic, by classic I know them mean one push the pedal and another opens a little valve. All I know is I've a friend some years ago by pressing down the pedal as asked but I did not see what he did.
I'm going to take a picture of the back of my van's wheel and ask you what's the little valve to use for that. I'll be back.
How to bleed a brake other than "classic"? What's easier?

[luisbe]

Is this the little bleeding valve?

[luisbe]

"All I know is I've a friend some years ago by pressing down the pedal as asked..."
That incoherent as written, I meant: I've a friend who I helped years ago by...

[LMP]

Yes that is the bleeder.
Well...there are some complicated alternate ways suggested with ABS systems, like pressure bleeding, even reverse bleeding..........but I've always gone "classic" without any problems. One note though: if the master cylinder has been left to go empty and air was introduced into the ABS unit, then there are also 2 bleeders on the ABS unit that you can use to purge the ABS first instead of pushing the trapped air all across the piping.
...ahh...close the bleeder cock while the pedal is at bottom.....or better, while it is being pushed down...not after it was released back up...

[luisbe]

Thank you very much LMP, I'll do that tomorrow provided my wife helps me.

[luisbe]

should ignition key be set to on before bleeding?