Now using the MAP sensor..

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JDM Sam said:
Yea bank 1 too lean. Now to install the new sensors, go catless with the CEL fix.
the light is on all the time? when it does run ok is the light still on? because when my sensors went bad the code read "bank 1 sensor 1 voltage error", not that it was too lean/too rich. the fact that the sensor is reading too lean may just be that it is reading too lean, not because it is flawed.

not to discount what anyone is saying, frayed wires and all, just relating my own experience with bad o2 sensors on this car
 
Voltage reading on the sensor is dead its not even fluctuating on his OBD2 reader. Over 80K miles the sensors worn already. Think of it as a tune up part. It's not that expensive if you get the universal one and splice it in. It runs like ass in WOT. The CEL is caused by faulty o2 and/or cat problem. With the CEL on it puts the ecu in limp mode by pulling timing & dumping fuel on the stock injectors and also pulling fuel b/c it senses extra fuel coming from the AUX injectors.
 
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bump for update...

Also about the car runnin like ass..or..as you put it
linux said:
Car ran great again this morning on the way to work, but is starting to show signs of returning to its former state.
While on boost or off boost driving?
 
MPNick said:
Yes you are right Dana, you know all. After all you have been doing this for what almost 18 months now. So you have now learned all there is to know about tuning. Yes you have built an engine, hit 13s and used the AEM/ MPI and maybe others. So yes I am wrong you must know all there is to know.
Har har har.

94 octane, not what you posted in another thread. You posted that you got 100 octane. This BS is not worth the time to go back and look it up.
When I ran my 13.8, it was on 94 octane. I also ran two 13.9s immediately before that, also on 94 octane. That was in early November. Get your facts straight.

The only time my car has EVER had anything more than 94 octane in it was June of 04, because after a couple of runs, I ran out of gas. The lowest octane that they had available at the track was 100. I put in a gallon of that, ran 2 more runs, and did signifcantly WORSE than I did on my first two runs (probably because I was tuned for 94).
 
Kooldino said:
Har I put in a gallon of that, ran 2 more runs, and did signifcantly WORSE than I did on my first two runs (probably because I was tuned for 94).
OK, so when I said that we had alot of timing out and were never able to tune for the high boost because of the spark blow out why would that not count???????????? Dean has not be able to gain that much from the C116 yet, because we have not been back to the dyno. Why does it not work both ways?
 
JDM Sam said:
Voltage reading on the sensor is dead its not even fluctuating on his OBD2 reader. Over 80K miles the sensors worn already. Think of it as a tune up part. It's not that expensive if you get the universal one and splice it in. It runs like ass in WOT. The CEL is caused by faulty o2 and/or cat problem. With the CEL on it puts the ecu in limp mode by pulling timing & dumping fuel on the stock injectors and also pulling fuel b/c it senses extra fuel coming from the AUX injectors.
thats right...makes sense.
My O2 sensor isnt fluctuating anymore when on boost.
 
Captain KRM P5 said:
Point is, even with the 02 sensors inoperable, my car never ran lean under boost, it boosted like it always had been.

perhaps you posted this before hand, but what proof do you have that your sensor(s) are faulty?
How much boost??? thats important

Mine goes all the way rich on mid rpms and near 12.8:1 on WOT high rpms @ 10+psi
 
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igdrasil said:
thats right...makes sense.
My O2 sensor isnt fluctuating anymore when on boost.
Well when you are in boost, your voltage level should be steady showing you rich if you have a voltage clamp. Mine was accually not sweeping, or sweeping slowly at idle, and while driving OUT of boost.

BTW, I am accually at the exhasut shop right now about to redo my setup, and install the new O2 sensors. Open WiFi networks own! (eekdance)
 
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yeah, what I meant is that is steady on 14 like when is out of boost. It still sweeps, but when on boost, it doesnt sends less than 13:1 anymore.
 
Well tonight the 1st O2 sensor got installed. I moved the Wideband downstream to where the secondary O2 sensor used to be, and took out the secondary O2 sensor till tomorrow when my exhaust will be re-done, and new O2 bung welded in. Immediately I noticed a smoother car with no bucking! The drive home was smooth. One thing I did notice is that the O2 sensor voltage/Air-fuel sweep is definitely a lot faster like it should be. Of course the CEL came back eventually, and I am back in limp mode with the stumble every now and then. This should be taken care of today. On the way back home, I got caught with my pants down.... A couple of cars wanted to race me, and did so. I did poorly when I should have owned them. Can't wait to get the O2 sensor issues done, and re-tune. (evil)
 
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LinuxRacr said:
Well tonight the 1st O2 sensor got installed. I moved the Wideband downstream to where the secondary O2 sensor used to be, and took out the secondary O2 sensor till tomorrow when my exhaust will be re-done, and new O2 bung welded in. Immediately I noticed a smoother car with no bucking! The drive home was smooth. One thing I did notice is that the O2 sensor voltage/Air-fuel sweep is definitely a lot faster like it should be. Of course the CEL came back eventually, and I am back in limp mode with the stumble every now and then. This should be taken care of today. On the way back home, I got caught with my pants down.... A couple of cars wanted to race me, and did so. I did poorly when I should have owned them. Can't wait to get the O2 sensor issues done, and re-tune. (evil)
This is great news!!
 
Well, later today I shall head back out and "git er dun." I am going to re-rout my wideband wire around the other side of my engine bay. That way there won't be any danger of me melting the connector. Also, I'm gonna install the 2nd O2, and the non fouler mod. The results look good so far on JDM Sam's car with no MIL/CEL or pending MIL/CEL. We'll see after about 100 miles what's what. We had my OBDII Scanner hooked up and noticed some interesting things while driving around. That will be in another thread as this is MSP specific.
 
yeah, the anti-foulers trick does work well.. I did it for a coworker whos Blazer's Cat fell off due to rust. we made a test pipe, and I did the anti-fouler trick on it. he had a CEL come back one time since, but its pretty rare... besides a ECU reset once a year (if not more often) is good anyways.
 
RyanJayG said:
yeah, the anti-foulers trick does work well.. I did it for a coworker whos Blazer's Cat fell off due to rust. we made a test pipe, and I did the anti-fouler trick on it. he had a CEL come back one time since, but its pretty rare... besides a ECU reset once a year (if not more often) is good anyways.
That must be some real strong rust.
 
LinuxRacr said:
Well tonight the 1st O2 sensor got installed. I moved the Wideband downstream to where the secondary O2 sensor used to be, and took out the secondary O2 sensor till tomorrow when my exhaust will be re-done, and new O2 bung welded in. Immediately I noticed a smoother car with no bucking! The drive home was smooth. One thing I did notice is that the O2 sensor voltage/Air-fuel sweep is definitely a lot faster like it should be. Of course the CEL came back eventually, and I am back in limp mode with the stumble every now and then. This should be taken care of today. On the way back home, I got caught with my pants down.... A couple of cars wanted to race me, and did so. I did poorly when I should have owned them. Can't wait to get the O2 sensor issues done, and re-tune. (evil)
About ducking time. Now get that dog tuned once and for all. What about getting your injectors cleaned?
 
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