Hello together,

i own a Pontiac Firebird 3,1L V6 1990. I have problems with the Emission. The Co range should have 0,3% and i have 4,7%. Today i bought a obd cable and downloaded the WinAldl. Now my question, what kind of EMC type does the car have (i think i have to set it in the configuration)?

Also, has somebody an idea what i could be, i already installed a new catalytic converter, new oxygen sensor, new temperature sensor. Ignition point 8 degress. No wrong air, nice idle, good kompression, no chip tuning.

Need realy help.

Thanks to all!!

 

try Diacom+ , you just need to enter your vin.
dc+ is dos-only , so you would need to use an old pc/notebook.


to your problem with the emissions testing, most likely you will have an air leak at your intake manifold.... and if i'm not totally wrong, the 3.1 v6 has an ignition timing of 10° btdc.

if your car runs great and you don't feel the need to pass your emissions testing legally, find someone who does the smog-testing with another car....

rgds,
alex

 

Thanks for the answer. I disasembled the manifold an sealed it completet also the vac lines are ok. I order an aldl cable and will use tunerpro RT! But of course i will also try diacom if it works with USB.

I have to find the problem, because i am sure that i can save gas and will have a better engine performance if it´s done. Also i don´t like to make it illegal.

You´re right the timing must have 10 degress. Maybe thats the prob. my timing is 8 degress. Have to try but i don´t think it will help so much.

Thanks

Danny

 

first, you will have to set the timing correctly - i think this is vital to the emissions testing... when my 92gta was at the tuv for the emissions testing, my o2 sensor was failing, and after replacing it, my co-values were still too high... they got better when I clamped down the air-pump hoses to the exhaust manifolds.... don't know if this works for the 3.1, too.... haven't have worked that much on those engines....

to diacom:
will not work with usb, as is stated it just works with dos, no dos mode, no dosbox, just the plain dos. really old-school, but in my opinion way better than winaldl.
my cable uses the lpt1 printer port, which was specially built for me. has a com1 plug, too... think i'll have to use this one for winaldl.
a friend of me has another interface which works pretty well with tunerpro.
i can ask him for definitions and mail them to you if you need further help.

 

Locherle, WinALDL won't work with that vehicle. It uses an 8192 baud comm link. You can try TunerProRT (www.tunerpro.net) as that will work with the 8192 link. The maskid for that ECM (1227730) is $88. This is required for the proper ADS file.

The ADS file is what TunerPro requires to decipher the data stream and display it. Should be there on the TunerPro site.

You have it with the base spark timing at 10* BTDC.

If the engine still has the stock injectors then replace them. The stock Multec injectors go bad quickly. There are several Bosch injectors that are a drop in. And make a big improvement in how the engine runs.

There are several threads on the V6 board here about which injectors can be used.

RBob.

 

ever checkd your lambda sensor ?
hmm, nevermind

 

With CO that high, it's rich - like 12.7:1 (lambda 0.87) or so. That means it's running open loop, or closed loop is pegged rich from a false O2 reading, or closed loop is pegged lean but something causing it to be very rich.

Many things to check, but yeah you need to get something to read the computer data and stop throwing parts at it.

 

I also tought it could be the injectors, because when i start the engine in the morning, then short a lot of smog is coming out of the exhaust and it smell extremly to gas.

Is it possible to check the injectors if they are leak??

Thanks

 

yoop, is new and works good. At Tunerpro you see a good regulation from the sensor.

 

I am sorry but what does "Open Loop" mean.