koolaid_kid

iTrader: (21)

Better yet, buy some software and start learning yourself. There is a learning curve (I am still very much on it) but it sure feels good to be able to diy. Just my opinion.

horist

dang... surprised this post got this many replies....

tune yourself (you'd be better off than the tuner you mentioned) or find a real tuner (see stickies)

edit: read most of the posts...

WHY did you even bring your car to the guy after all of the posts here?

based on your initial post of him.... everyone says don't go there... you go there.... something about 20 bux blah blah


so.... why did you ask "our" opinion... yet still bring it to this guy.. and then ask "us" for our opinion?



Why did you ask for an opinion.. get many replies of "RUN" yet still go there??? you even posted that you "I made it back in one piece"...

I have a "chip" that sells for 25 bux on ebay that i'll sell for 15 ... PM me for details

Frost

iTrader: (45)

I got a whole bag of chips!

edcmat-l1

iTrader: (10)

In the original posters defense, it sounds like he only let the guy scan his car, on the advice given here, to not let him "tune" it....Not much he can harm doing that. Although misinformation aint good either.....Can I get a couple of those chips?

Tiger2o69

iTrader: (16)

I agree. I would have gone just to see what other hilarious **** this guy could say. I wouldnt let him touch the car but it would be funny as hell to talk to him.. He cant hurt it just scanning it. With a handheld it probably wouldnt be able to tune his care anyway since most are locked.

Sharpe

iTrader: (7)

You need to read the thread before you start popping off and slamming me.
I told everyone that I was going there. I never asked if I should go there. If you read the thread and have at least an eighth grade reading comprehension, I said I was going there to have it scanned. Due to the advice I received before I went, I changed my mind about letting him make any changes to anything, besides maybe to shut off the O2 code.

I got what I wanted, but people keep replying with more advice after the fact. Nice of them and all, and from some I learned a lot and thanked them, but this thread ran its course after post #15.

Again, thanks to all who replied with good information. It's posters like you who make LS1Tech a great place to come to learn.

Now, please, if a mod sees this...

mattraypharbor

iTrader: (2)

^ ya i would do that to and... proab bitch at him for wasting my time.

Slvr00Bird

iTrader: (2)

The misfire problem that you described, if it wasn't the O2 sensor or anything of that sort, sounds electrical. I had a very similar problem. When I put my car under load, in other words, went up a hill and allowed overdrive to leisurely kick in, my car would have a power loss and sound like it was backfiring or sputtering. I have access to a diagnostic scanner, so after scanning it, there was no codes for knocking. I did have an O2 sensor code, however, it is because I cut my cat. off and with that the O2 sensor won't read correctly. I then cleaned my K&N filter, thinking that I over oiled it after the previous cleaning and the oil had gotten on my MAF. This didn't help. As it turns out, I had a bad coil pack. I then replaced all of my plugs, wires, and bad coil and the problem was fixed. But sounds like to me this is an old post and surely by know the problem has been fixed.

Fratsit

iTrader: (1)

Thank you for explaining it like that , although I am now a bit confused. I had asked a while back as to what effect the VE table has on fueling the engine and it was explained that the higher the value in any given cell (in % of Theoretical Value or g*K/kPa) the more fuel the PCM would give the engine.

Just a beginner attempting to learn...

Sharpe, I did not mean to steer you in the wrong direction.

R/

Frat

Billf6531

The VE value essentially commands a certain volume of fuel. Then the O2 sensors provides feedback (it's rich or it's lean) and the PCM leans out or richens up the mixture, as necessary to achieve stoich (14.681 or whatever your PCM is set at).

The problem with a VE value that's too small, is that the PCM adds fuel to correct it, and this additional fuel is also added when the car goes WOT. That causes the AFR at WOT to be incorrect (i.e., if you wanted a 13.0 AFR at WOT, and the VE cell you were in just before you went WOT was 2% lean, the WOT AFR would be ~ 12.75).

If the car runs rich, and the PCM leans it out, those values are not carried over to WOT. Generally you want to tune the VE to be 2-4% rich.

Sharpe

iTrader: (7)

It has not, but I've not done anything to check or fix the problem. Too busy right now.

My car, however, doesn't have this problem under load/low RPMs. It's at 4500 and above when racing/passing.

Probably this week I'm going to swap the bank 1 and 2 sensors and see if it still gives me the same code or not. While I'm at it, I'm going to visually check the plug wires over better to make sure they didn't get "roasty toasty to the mosty" on a header.

I'm pretty sure it's either a bad O2 or unmetered air in the intake tract. Really, really hoping its the former rather than the latter.

Thanks for all the advice and helpful replies!