Thread: Wideband Tune

Just got a wideband and ive had hptuner pro... looking to see if anyone would look threw my scans and help out with a tune...

thanks for anyones help

Sure, but do you know what you want and what you have?

If so, you should know how to get there.

Assumes you're running E0 though.

commanded should reflect your fuel.

Adjust stoich accordingly.

If only our PCMs operated in lambda.

Leaving stoich alone is wrong.

Just like adjusting stoich higher so that your entire tune is off, ensuring you need a retune every time you change something.

E10 is ~14.08.

ok the car is a 97 and i removed my rear 02 to put the wideband in...

first i am lost on how to remove the rear 02 from the car... second im lost on this whole tuning thing so im sorry for the newbishness

you removed the rear O2. Lol?

Read this mother: http://www.grandprixforums.net/alter...hod-65418.html

Originally Posted by JoRoW99

Exactly so if you change the stoich the whole tune will be off... Theres more than one way to split an egg. Id like to do it the right way but im starting with this one.

For the rear O2 just delete the code. You also may want to consider putting it in the front O2 bung if you do OL tuning.

If stoich is correct, and your entire fuel model and air models are correct, you should never have to adjust your tune even if you add some heads and a cam.

Just bump up idle and enjoy.

Commanded AFR should equal actual and you wouldn't have to make any other adjustments minus possible spark adjustments.

Granted you adjust stoich to reflect the actual stoich of your fuel.

The right way is to have your air and fuel models as accurate as possible.

The 3800 way is to do whatever the **** you want and just keep tinkering until you get what you think is acceptable.

Honestly thats just a stupid way to tune, but its what a lot of the "3800 pros" do.

Reasoning? No idea. However based on what I've seen, it forces you to go back for adjustments, resulting in more business.

But if the tuner told you that would happen if you changed something, then you'd think they're right, and trust them and continue to pay.

When in reality, nothing could be further from the truth.

Oh well, continue doing whatever makes you happy. Thats what tuning is about right?

ok so it is better to put it in the front 02 why??? i have no cat in there ??

im in akron

Originally Posted by 05grndprix

ok so it is better to put it in the front 02 why??? i have no cat in there ??

Do you know why people suggest putting the WB before the cat?

Do you know what the front O2 sensor does in your car?

Find the answers to those questions first.

Originally Posted by JoRoW99

Fact.

whats so funny about removing the rear O2? I did and i have a 2001 (with a 2000 bin file)

That was sarcasm LOL.

2001+ likes to run a cat test which dumps fuel until it sees sufficient delay in O2 changes between the front and rear O2 sensors.

matt is that you?? its zach brians friend