Can someone look at this 7747 bin?

[Mastiff]

I want to see if I'm going crazy. The guy at TBIchips.com has been helping me and he claims that this bin file has the "min temp for egr" set way up so it won't ever enable. When I look at it in Tunerpro, it looks like it's at something like -35F. Maybe my XDF is all wrong or something, I don't know. But if someone could double check, that would be helpful.

For the attachment, I changed the file extension from .bin to .txt so it would attach. You'll need to change it back to .bin to read it.

Thanks for the help.

 

[GMC Truck]

I got the same thing on mine and the EGR "flag" is still enabled. I always uncheck the code 32 flag and raise that temp to 300 degrees. -35 still might disable it unless your going to the north pole soon... HA! Is that all you paid to have done or is he just offering advice on changes???

 

[Mastiff]

I got the same thing on mine and the EGR "flag" is still enabled. I always uncheck the code 32 flag and raise that temp to 300 degrees. -35 still might disable it unless your going to the north pole soon... HA! Is that all you paid to have done???

I'm confused, don't I want the "minimum to enable" to be really big to keep EGR from enabling? I have since cranked it up to 300+ F, whatever the max is. At -35F I think it would be enabled all the time except in Fairbanks in winter.

I haven't paid him anything, he's just helping out I guess. I went to him with the intention of paying, but what I wanted was so basic I guess he doesn't care.

I got this bin from him which he said the EGR was disabled, but it doesn't look to me like it was. I hope I don't have a bad XDF. I think he's using tunercat or something other than Tunerpro anyway.

Since then I have:

- Increase the minimum EGR temp to 300+
- Increased the knock enable temp to 300+
- Disabled the switches for EGR, knock, VSS (I don't have these)
- Tweaked the BPW some. I have "cop car" injectors. He started me at 120 but my BLMs were coming in at 150 or so. I'm at 132 now and it's still lean. My old bin had 135 and it was super rich, but maybe my VE tables and other stuff I don't understand was different too. My old bin ran super rich and belched charcoal out the exhaust until it went closed loop.

I wish I could just find a guru with a dyno to dial this thing in once and for all. I'm sick of messing with it. It runs okay now, but if I gun it has a flat spot during that heavy load, hard accelerating spot.

 

[GMC Truck]

Based on my experiance with the efi stuff if possible add a VSS it really will help you cause the ecm sees that your adding throttle but going nowhere. The VSS from "jagsthatrun" is really simple unit with two wires, one groung and the other to the ecm. Screw onto the speedo output- NICE unit! Flat spot and accel bog is trickier to fix. I tuned the "accel enrichment vs coolant temp" up a little at a time and finally got my bog out. I dont know if that was the correct way? but it worked?? I think your XDF file is ok cause I use the same program and XDF and I got what you got but Tunercat is diffrent. daveW has helped me a bunch on this site and he seems to be spoton every time.

 

[Mastiff]

The biggest thing keeping me from getting VSS is the pain I see in adding the wires to the harness. Not that it can't be done, but it's routed every which way and carefully tied down.

Will the VSS you're talking about work with an old style speedo? I thought the speedos changed when they went to EFI.

 

[dave w]

Here are some screen shots I have of the ASDU.bin. using TunerCats. Setting the EGR on at 233MPH should disable the EGR.

I set the Park / Neutral input to the ECM to Ground (Battery "-" Negative) when I don't use a VSS for a 7747 ECM.

dave w

 

[GMC Truck]

The biggest thing keeping me from getting VSS is the pain I see in adding the wires to the harness. Not that it can't be done, but it's routed every which way and carefully tied down.

Will the VSS you're talking about work with an old style speedo? I thought the speedos changed when they went to EFI.

It will work even without a speedo. It just screws onto the speedo output on the transfer casen and just wire it in. You don't have to have it but it is easier to tune with it as it really does control alot.
The one you need is #1 in the pic ( www.jagsthatrun.com )

 

[Mastiff]

It will work even without a speedo. It just screws onto the speedo output on the transfer casen and just wire it in. You don't have to have it but it is easier to tune with it as it really does control alot.
The one you need is #1 in the pic ( www.jagsthatrun.com )

Looks easy, thanks.

 

[eagle mark]

I got the same thing on mine and the EGR "flag" is still enabled. I always uncheck the code 32 flag and raise that temp to 300 degrees. -35 still might disable it unless your going to the north pole soon... HA! Is that all you paid to have done or is he just offering advice on changes???

I thought the flag enable let's the ECM check the EGR and if wrong sets the check engine light! Nothing else. The other settings are what's needed to disable the EGR.

Without EGR the spark table is totally differant. Allowing EGR let's in little exhaust gas to lower temp and avoid a nasty pollutant. But it also allows way more spark advance to make up for it.

 

[GMC Truck]

I thought the flag enable let's the ECM check the EGR and if wrong sets the check engine light! Nothing else. The other settings are what's needed to disable the EGR.

Without EGR the spark table is totally differant. Allowing EGR let's in little exhaust gas to lower temp and avoid a nasty pollutant. But it also allows way more spark advance to make up for it.

There is a diffrent table that the ECM looks at when the EGR is active but if disabled it wont look at that additional table. I think the "flag" is just the setting to turn on the SES light and stop the code but you still have to prevent the EGR from activating.