Hey all, Coming to you guys for some advice... i'm using a '7730 ECM to run a V6 with a big cam, headers, port work etc. Been working on the tuning for a month or 2 and it was getting pretty close. then the fuel pump went out.

I replaced the pump with one for a stock 350TPI and a new filter.. then my BLM's dropped to 91

I'm using Freescan to datalog since tunerpro RT won't connect to the ALDL box.

Basically i know that i need to adjust the VE all over the place now but the oddity is the NB o2 volts when it goes into PE mode. I'm commanding a 12.3 AFR and the o2 volts are going way lean. They weren't doing this before the new pump...

BTW, i'm using #32 sy/ty injectors and a 43PSI FPR. (full mod list here: http://www.v6z24.com/registry/whitelightning2/ )


Here is a datalog: http://www.davesux.3x00.com/726chipLA1timing2.csv



thanks for any help!

Dave

 

Get a wideband 02, the NB is nearly useless at WOT(and idle sometimes). Your 1-2 months of tuning would have been cut in half. That alone makes it worth the money. Your trans am will also thank you. (-:

 

I was getting between 170-250mV at wide open no matter what I did on my brother's v6. I changed the O2 sensor, and nothing else and started getting readings in the 950-1000mV range, I think it depends on the sensor quality and especially its condition.

from experience, a wide band is invaluable when making a good tune.

 

got a wideband sitting right infront of me, just need to finish building the harness and it'll be reay to install. The car is up on jack stands for a few upgrades, hopefully next week i'll be able to test it out

The Trans Am? you mean that purple thing collecting dust on the side of my house?

 

Exactly as 11s says. Both Tim, myself and almost all of us old time TGOers here have ALL been there...and we ALL have learnt that on a WB O2 is really the only way to get there. You MAY get it close (especially if you use it inconjunction with other old school tricks like reading plugs), but a WB is really the only effective way to do it.

Further, with Real Time tuning & a WB will make the job even faster yet. You'll do in days what takes months...and it will be done RIGHT!

But I am so glad to hear that you are installing a WB.

 

Thanks!


I tuned the T/A the old school way, by smell/feel and it ran pretty good, only in the last 2 yrs got into this computer tuning.


I've been piecing together a WMS wideband unit, Should be done ASAP. I'll also be able to datalog with it through the ECM which will be a nice plus...

I might end up using it on the T/A down the road after i rebuild the engine.. probably gonna switch to EFI on it as well.

 

Thata boy!

 

oh you just wait till you see the plans...


Since it's a project with no deadline it's probably gonna get a set of spooly things.. If i can only find a good aftermarket EFI Vortech manifold..

 

You need to really learn that six banger stuff. I think it would be great to have an expert v6 guy here on the prom board.

 

I got my ostrich 2.0 yesterday, haven't driven the car yet but i plan on hitting the tuning hard in the next few weeks...