what is with the shift light im my car I have a stock 88 MAF TPI on my 86 350

I also have a 5spd


the light tells me to shift way too much. like doing 30 in 4rth @ 1000 rpm i give it gas is says shift. can i move the thing to a more resonable rpm range or am I stuck using the hammer on the bulb fix

------------------
1986 IROC 350 5spd
just installed a TPI from a 1988 IROC, 24# lt1 injectors,165 ECM MAF, custom sub frame

 

The shift lite is controlled by the computer, hence, there is no adjustment. The computer tells you to shift for maximum gas mileage, so, it will usually want you to shift at very low RPM. The hammer will work VERY well.

Have fun.

 

You should be able to change the shift light parameters by burning a new prom, or even disable it if you don't care for it.

 

I want to change it where is the parameters

 

I cannot say where the parameters are in the $32 (or $32B.TDF) (1986-88 MAFs), but I know where they are in the 6E.TDF (89 MAF) and $8D.TDF (90-92 SD).

They are adjustable, but there wasn't room in the .TDFs from TunerCat. But now that they have created the new version that supports more constants and tables, they might be willing to add them.

 

Glenn,

Could you, would you, post the locations and descriptions of the parameters for 6E? I would like to edit the bin to turn that light off.

Thanks,
Kevin

 

My $32 code has several locations to play with the shift light. Here are two:

$C2D8 - Threshold for lite on /25
Default is $28h = 40d x 25 = 1000 RPM

$C2D9 - Force lite on /25
Default is $B0 = 176d x 25 = 4400 RPM

 

For $6E, these are the parameters for the Shift Light. Have fun.

;==============================================
; E LIGHT PARAMS
;
;==============================================
LC2ED: FCB 120 ; 50C, (122F) MIN FOR LIGHT ENABLE

LC2EE: FCB 47 ; 47 MPH MIN FOR LIGHT ENABLE
LC2EF: FCB 0 ; 0 TPS MIN FOR LIGHT ON
LC2F0: FCB 0 ; 0 LV8 MIN FOR LIGHT ON

LC2F1: FCB 56 ; 1400 RPM THRES FOR LIGHT
LC2F2: FCB 208 ; 5200 RPM FORCE LIGHT ON

;----------------------------------------------
; E LITE ON TABLE
;
;
; %TPS vs RPM
;
; ARG = %TPS * (256/100)
;----------------------------------------------

;----------------------------------
LC2F3 FCB 13 ; 5% 800
LC2F4 FCB 46 ; 18% 1600
LC2F5 FCB 118 ; 46% 2400
LC2F6 FCB 192 ; 75% 3200
LC2F7 FCB 192 ; 75% 4000
LC2F8 FCB 255 ; 99% 4800
LC2F9 FCB 255 ; 99% 5600
;----------------------------------------------


LC2FA FCB 52 ; LIGHT OFF 625 RPM
LC2FB FCB 204 ; FORCE LIGHT OFF, 5100 RPM

;----------------------------------------------
; E LITE OFF TABLE
; TPS% vs RPM
; ARG = %TPS * (256/100)
;----------------------------------------------

;----------------------------------
LC2FC FCB 18 ; 7% 800
LC2FD FCB 51 ; 20% 1600
LC2FE FCB 123 ; 48% 2400
LC2FF FCB 197 ; 77% 3200
LC300 FCB 197 ; 77% 4000
LC301 FCB 255 ; 99% 4800
LC302 FCB 255 ; 99% 5600
;----------------------------------------------


;----------------------------------------------
; E LIGHT ON DELAY MODIFER
;
; ARG = sec * 10
;----------------------------------------------
;
LC303 FCB 2 ; E LIGHT MULT
;
; sec's %TPS
;----------------------------------
LC304 FCB 150 ; 15.0 0.0
LC305 FCB 150 ; 15.0 12.5
LC306 FCB 150 ; 15.0 25.0
LC307 FCB 150 ; 15.0 37.5
LC308 FCB 150 ; 15.0 50.0
;----------------------------------------------

[This message has been edited by Glenn91L98GTA (edited September 18, 2001).]

 

I changed mine to come on above 2400 RPMs, and forced on at 5100 RPMs. Its great.

I really hope Tunercat adds it for TPI and TBI cars. I emailed him a while ago and he said there wasnt enough interest for him to add it.

------------------
1991 Camaro Z28
5.7L 5-Speed (originally 305)
317 RWHP, 418 RWTQ
13.23 @ 107.62 MPH
Southern California
Member: SoCal 3rd Gen F-Bodies
Member: SoCal F-Bodies
-=ICON Motorsports=-

 

Add it yourself with TDF Editor. TDF Editor is free for 30 days.

 

Old topic, I know.

Kevin, How'd ya manage to get it to come on only at a certain RPM?

I see a !shift in winbin of 5200, but the On/Off tables are RPM vs TPS. For racing applications, TPS would be maxed out (WOT) at any given RPM.

-- Joe