$88 shift lamp controls?

**f85gtron** · 06-11-2015

Noob question......
I've got a four speed manual, but the shift lamp lights up after top gear. How and where to look to adjust the lamp switching in $88 mask?

**1project2many** · 06-12-2015

Hi.

There are several shift light on/off parameters. Is there anything in your definition file?

**RobertISaar** · 06-12-2015

considering the shift light code in $88 was meant for a 5 speed, I'm not surprised. the only scalars you have to play with for 5th gear are the N/V ratios to determine which gear you're operating in.... change those to match your 4th gear values. if I'm looking at the code correctly..... that may be the least intensive way of implying top-gear operation to the ECM... otherwise, you could shift all of the gear's N/V values around to where you essentially "skip" 1st gear and start in 2nd.

**f85gtron** · 06-12-2015

I don't have any definitions that allow changing the gear ratios. Does that mean i have to change the hex values? And where would they be? I'm more than happy to dive in and learn, but I'm a noooooooob!

**RobertISaar** · 06-12-2015

http://www.gearhead-efi.com/Fuel-Inj...ll=1#post14017

that should help. I have a newer version with a couple of smaller fixes that I haven't uploaded yet, but they're not shift-light related that I can remember.

**f85gtron** · 06-12-2015

Awesome, thanks! That had to take some serious effort to match all those operations up with the hex! Wow.

**f85gtron** · 06-13-2015

I skipped 4th.....just maxed out the values. I chose 4th because 1st through 3rd seem to have other things dependent on them and so does 5th. I'll report back when i burn my chip and drive.

**RobertISaar** · 06-13-2015

that should work. not too much in the code cares what gear you're in for a manual except for RDSC, but that is disabled in most calibrations, I think. I want to say that only covers 1st-3rd(gears above 3rd use 3rd's values) anyways and has its own n/v ratio thresholds for activation(again, off of memory).

**f85gtron** · 06-13-2015

It worked! AND better than I imagined. It pulls like a truck through the gears now. There must be some kind of dependent code in there somewhere.
Now that I'm not constantly being irritated by the shift light, I can concentrate on fueling :)