<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94lsboost &raquo;</TD></TR><TR><TD CLASS="quote">Ok so I just got a turbo kit, pieced together kit, including: Lovefab SST mani, K26 turbo, Delta Wastegate 5-7psi springs, Greddy type S BOV, Ford Probe intercooler, 2" piping....and the worst **Vortech FMU**

OK so I plan to run 7 psi on my 94 LS. I have a GSR tranny, and it is stock other than that. So My question is, is the vortech FMU adequate? Stock Fuel system? I'm going for inexpensiveness here. Ideally I would like to buy a wideband O2 and use Uberdata to tune it, but we don't have a dyno anywhere close, and I don't want to spend like 400 for the O2, reader, and dyno time.

So another question, would it be better to get a map from someone who has a similar setup and use it?? I have an eprom burner...IF so, does anyone have access to such a map? (if you think you do you can ask me for more specs)

Ohh, and should I get bigger injectors and a fuel pump? either way with FMU or uberdata? (most likely DSM 450's and walbro 225) b/c of their prices.</TD></TR></TABLE>

personally i would say just get the car on the road. vortech fmu is perfectly adequate for gettign the thing running and getting all the bugs worked out and allowing you to just drive the damn thing after all that time and money.

once you've recovered from the cost and time of getting the car setup, come back and then see what can be done.

 

JDM P72 ECU CODE

Speed limiter: hex address 18A4, 00 sets to 0 mph, FF sets to 158 mph, anything in between figure out for yourself (we all know hex don't we? )

Knock sensor: hex address 5467, 00 disables, FF enables

PA sensor: hex address 5469, 00 disables, FF enables

ELD: hex address 5471, FF disables, 00 enables

O2 heater: hex address 2315 to 0x2317 inclusive, 03 50 23 disables, F4 BC CE enables

Can anyone confirm that the above is correct? I'm trying to summarize the enables and disables. Uberdata is being installed tomorrow and I've got an autocross Sunday that I need it running with no CELs! That means !knock, !O2 heater, &gt;speed limiter, (bool)PA sensor == true, possibly (bool)ELD == true.

Blake, it's almost time for you to get your gratuity from me

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by raene &raquo;</TD></TR><TR><TD CLASS="quote">JDM P72 ECU CODE

Speed limiter: hex address 18A4, 00 sets to 0 mph, FF sets to 158 mph, anything in between figure out for yourself (we all know hex don't we? )
</TD></TR></TABLE>

i believe this is correct.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">Knock sensor: hex address 5467, 00 disables, FF enables</TD></TR></TABLE>

i verified this myself.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">PA sensor: hex address 5469, 00 disables, FF enables</TD></TR></TABLE>

not sure, since JDM and EDM ecu's do not have PA sensor so its disabled already.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">ELD: hex address 5471, FF disables, 00 enables</TD></TR></TABLE>

same as above.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">O2 heater: hex address 2315 to 0x2317 inclusive, 03 50 23 disables, F4 BC CE enables</TD></TR></TABLE>

i found this one! this is my first little contribution to the reverse engineering of the honda rom's it works!


why dont you start with a USDM ROM since it sounds like you have one (PA sensor etc)? all the above info should apply.

 

I'm going to use the P30 erm baseline rom... I've already modified it in the ways stated, just confirming that it's correct . I also like to have the material compiled into a single post for anyone else that comes along.

It's lovely when you're looking for a solution to a problem by searching and you come across a bunch of threads saying 'search' that never answer the freaking question... heheh

BTW, thank you VERY much for the O2 heater disable code... that was a major factor preventing me from converting to OBDI. Now I don't have to buy a new O2 sensor, I just have to rewire the ECU plugs and distributor. And even better, for people using the LM-1 wideband option, the narrowband output to the ECU can be used by the ECU without it throwing a code for the O2 heater circuit because the LM-1 itself controls the heater circuit Tres cool!

Final confirmation point: 0x#### means that the #### part is a hex string, correct? I have to be stupid and ask
&lt;-- never used a hex editor before, for anyone worried about this step, it's actually hella easy

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by raene &raquo;</TD></TR><TR><TD CLASS="quote">And even better, for people using the LM-1 wideband option, the narrowband output to the ECU can be used by the ECU without it throwing a code for the O2 heater circuit because the LM-1 itself controls the heater circuit Tres cool!</TD></TR></TABLE>

yeah i built my own narrowband converter for my techedge 1.0:



it works great!

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">
Final confirmation point: 0x#### means that the #### part is a hex string, correct? I have to be stupid and ask
&lt;-- never used a hex editor before, for anyone worried about this step, it's actually hella easy </TD></TR></TABLE>

yes 0x is usually a predesignator used in programming languages to indicate a hex value or location. i usually see stuff like 5467h where the 'h' means hex..maybe the 0x means its an address location? i forget all the lingo. regardless, i believe you're correct.

 

any one got any ls turbo maps that they would like to share?

 

Modified by InTeGrA B18b1 at 4:44 PM 11/28/2003

 

someone hasn't read the thread and has not done their homework

 

can one of you ecu guru's tell me how the hell to chip a JDM P72. first of all, i can't find any of the c51 c52 r54 or j1. second, there is already a chip in there and third, there is already a HC373 and it is small as hell. wtf do i do?

 

there is TONS of info in this thread SPECIFIC to the jdm p72

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 94goldjungsr &raquo;</TD></TR><TR><TD CLASS="quote">there is TONS of info in this thread SPECIFIC to the jdm p72</TD></TR></TABLE>

damn you. i just looked through 32 pages of thread and there is some info on JDM bins but none on chipping.

 

Actuall there is, someone posted a link the a site that explained in depth not only the difference but how to chip both usdm and jdm ecu's. its there, I think that slashdevslashnull posted it.

Rob

 

thank you, Rob.

 

My UBERDATA page has a links section also, though pgmfi seems down at the moment.

 

sorry, i must have missed it. thank bro.

it looks like i have an auto ecu because the 20pin IC is already there and so is the 28 pin rom.


Modified by ndogg at 11:12 AM 11/22/2003

 

You can convert it.

Rob

 

ive been running this ecu for a year with no check light. i'm not positive its an auto. when reading one of the links off the uberdata page, it shows a jdm p30 auto and it says that you don't need to put the 20 pin IC in because its already there. well mine is also already there. either way, it looks like i don't have to add that. can some one with some experience chipping this ecu confirm any of this.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">
JDM P72 ECU CODE
Speed limiter: hex address 18A4, 00 sets to 0 mph, FF sets to 158 mph, anything in between figure out for yourself (we all know hex don't we? )
</TD></TR></TABLE> correct ife tested this one and if you set it to ff you will be able to drive until you hit the 158 mhp mark.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">
Knock sensor: hex address 5467, 00 disables, FF enables
</TD></TR></TABLE> correct also listed on the pgmfi wikki
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">
PA sensor: hex address 5469, 00 disables, FF enables
</TD></TR></TABLE>correct
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">
ELD: hex address 5471, FF disables, 00 enables
</TD></TR></TABLE>correct
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">
O2 heater: hex address 2315 to 0x2317 inclusive, 03 50 23 disables, F4 BC CE enables
</TD></TR></TABLE>correct.

i can mail you a bin with all this stuff disabled exept for the O2 heater, and the speed limit on 158 mph if you want...

 

Can some one tell me what the o2 heater does so i can check it...

what is it suposed to do ?? and why does it do it. and why do you want to dissable it is you are using a wideband O2 sensor ??

 

Pardon my ignorance, what is PA and ELD?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by toxicshit &raquo;</TD></TR><TR><TD CLASS="quote">Can some one tell me what the o2 heater does so i can check it...

what is it suposed to do ?? and why does it do it. and why do you want to dissable it is you are using a wide-band O2 sensor ??</TD></TR></TABLE>

The o2 heater regulates the o2 sensor's temperature, you want it disabled if you use a wide-band to feed a narrow band signal to the ecu (in place of the stock o2 sensor) If you do not disable it AFAIK, it will throw a code when the stock o2 is unplugged. You can run a wide-band in the way mentioned above with out throwing a code by leaving the stock o2 plugged in (the heater wires) and clamping it to something (like the exhaust pipe) or getting a second o2 bung etc.

 

ELD = Electrical load detector
PA = Atmospheric pressure sensor

 

thnx /dev/null,
then im thinking of 2 O2 bungs. thnx for the info.

 

toxicshit, no problem.

I used to clamp mine to my exhaust pipe and put the wide band in the bung, since I only had one bung - but now that I can disable the heater check in the bin I will just remove the stock o2 completely (the wide band controller regulates the heater circuitry of the wide band o2)

 

guys is there a page that explains the various hex addresses...I could have sworn there was a section in the PGMFI wiki, but I just looked and can't find it??