how do i disable the egr in a 91 rs with the 8746 chip. do i just change the on temp to 254 and disable it in the flags. also which flag is it.

 

You got it.

 

would u happen to know which flag it is.

 

LD43B: FCB $B9 ; 1011 1001, 185
; b7 code 25, IAT Sensor Hi
; b6 code 31, MAP LOW, (NOT USED)
; b5 code 32, EGR failure,
; b4 code 33, MAP Sensor hi
; b3 code 34, MAP Sensor low
; b2 code 35, IAC error, (NOT USED)
; b1 code 41, NO DRP , (NOT USED)
; b0 code 42, EST Mon error

 

thanks, ill take a look at that

 

i dont see that grumpy. under flags i have six options to choose. Diagnostics @ 43A, 43B, and 43C. then i have options @0x0005, 0x0006, and 0x0007. there are numbered boxes under the diagnostics and the "B" boxes under options. do i just click off the "32" box under diagnostics?

 

and the 32 box is already not clicked. so whould clicking it disable

 

i just tryed to change the on temp to 254 and it wont stay changed. anything above 150 and it changes it to a negative number. i type in 152 and it changes it to -40. is there another way to disable egr. maybe withthe tps, speed, or low map are my other options in it.

 

There are two EGR temperature locations (I don't have them with me). If using a hex editor set them to 0 (inverse temp term).

It sounds like you are using an editor and the conversion is off a little or such. It may be that 151° C is the max temperature. Set it to that and try it.

RBob.

 

how would i know that worked. and do i click on the flag under diagnostics and click the 32 box. it is not clicked right now and in my stock chip it is not clicked. so im guessing clickign it disables it.

 

Don't worry about the malfunction bit. Get a hex editor and goto $20C and then $20D in the bin and set them both to zero (0). Your EGR will then be disabled. Don't forget to redo the checksum before burning the chip.

RBob.