Hi folks,

after weeks of reading through the archives I finally decided to enter the world of promburning.
I ordered my Burn1, G2 Adapter and some 29c256 chips from Craig Moates and finished fitting the adapter and the new chip to my ECM yesterday.
To my surprise I found that I didn't have the stock eprom in it but a "Superchip" instead. Doing a compare to a stock AXKW.bin from the internet I found, that the superchip guys had just changed the main spark table and the speed limiter.Everything else seems to be equal compared to the stock AXKW.bin.

To start with, I changed my Highway mode enable speed and Highway mode min. speed from 52mph to 45 mph. I also found a Highway mode timer which is set to 60s.
Being a newbie, in my naive understanding I thought, this would be a delay timer.

But after doing a search here, I found some articles where it is said, that this is an enable timer which tells the ECM for how long highway mode is enabled. There was a mentioning of a highway mode delay timer also, which I couldn't find in my *.bin using the *.ecu file I have.
If I understand it correctly, these parameters are for TPI engines.

My questions are:

1. Does the information for TPI engines hold true for the TBI engines ($61 mask) also? If so, where do I find my delay timer?
2. Should I change this 60s value or should I better leave it as it is?
3. Is highway mode only enabled when in high (5th) gear when using a manual trans?
4. And if so, is it possible to enable it when being in 4th gear and how do I do that?

I think it was Glenn, who said that he lowered his highway mode enable speed to 31 mph. I would like to do the same to benefit from highway mode when doing city cruising at lower speeds in 4th gear.

Above all, I am still not sure if I use the correct *.ecu file for my application. My car is a 92 'bird with a 305 TBI, T5, '8746 ECM and I use the "new8746jonprevost.ecu". It would be fine if someone could shed some light on me concerning the *.ecu file.

Thanks in advance.

Andreas

P.S.: For anyone who is interested in the superchip.bin of my eprom, I have it attached to this message as AXKW_superchip.bmp. Simply change the file extension to *.bin when saving it to your computer.

{edit: attachment deleted by mod, aftermarket bins are not alllowed}

 

One area that can be confusing is that the $61 code has a hiway SA mode and a hiway fuel mode (lean cruise). These two modes are also separate from each other. Which I don't agree with. As the AFR is leaned it burns slower, so it is an advantage to add a little additional SA. Anyway, here is the info on the fueling side.

1) In general GM did a lot of things in a similar fashion. When it comes to specifics this changes. In this case you can't really compare the qualifiers and how the hiway mode operates between the TPI and TBI stuff.

2) There are two hiway mode timers, one as a lockout and the other as 'in hiway'. I like to set the lockout to 12-15 seconds. This gives enough time for the BLM to adjust as the engine stabilizes. Then stay in lean cruise for at least 2 minutes.

3) Not as far as I can tell. Seems that there isn't any transmission qualifiers. Do need to be in closed loop w/o any MAP malf.

4) N/A

Here are the fueling hiway qualifiers from the hac:

The timers appear to be in seconds. Not sure what the EGR stuff is doing.

RBob.

 

Well, I'm just shocked.