Jet DST fuel cutoff

**aboturky** · 02-14-2016

OK tell me how do I spark cut it I know it is damaging for the engine but I want to do it how ?

**1project2many** · 02-14-2016

You'll need an MSD or other aftermarket rpm control device. It's not built into the stock computers.

**aboturky** · 02-14-2016

i made a 2015 sierra e92 do it and it is stock

also i had a stock 2008 silverado do it but using hp tuner

**Hog** · 02-14-2016

I use Tunercats and I can make and blackbox and 0411 do that. And they sound exactly like it does in the video. If 6100 defuel, 5900 defuel is too slow, then tighten them up until you get what you want. A 6100 defuel and 6098 refuel will sound like a constant buzz.

peace
Hog

**aboturky** · 02-14-2016

i did do that if you look but didn't work

constant>system parameter>extreme fuel cutoff RPM 6100 extreme fuel resume RPM 6098

**aboturky** · 02-14-2016

Attachment 10244 see the picture there is an X on the ETC cutoff if i remove it and tick the spark cutoff will that work ? because i removed the X without puting the X on spark and it didn't work

**LRT** · 02-14-2016

I don't have Jet DST ... assuming it is similar to Tunercat.

There would be at least 4 steps required:

1. go to Switches>Calibration Options: put an "X" in "RPM Limit Spark Control" (remove the "X" from RPM Limit ETC Control)

2. go to Constants>System Parameters: set the Extreme Fuel Cut / Resume RPMs to about 500 RPM above (i.e. 6600 / 6500) the actual limit you want (this is the Master Rev Limiter - it needs to be higher than where you want to set the Spark Cut Rev Limiter)

3. go to Tables>System Tables>Fuel Cutoff RPM vs Gear: set this table to where you want the Spark Cut Rev Limiter (i.e. 6100 RPM)

4. go to Tables>System Tables>RPM Limit Control Method Change Delay vs Gear: this table will control the delay (in seconds) in changing from Spark Cut to ETC (Throttle Cut) as the Rev Limiter (i.e. set it to between 5 and 10 seconds)

Try this at your own risk ...