Idle tuning 2012 mustang 3.7

[Mavereq]

I just got my swap completed enough to test drive. The engine is really slow to drop RPM when I let off the throttle. I tried some settings that were recommended in another thread (dashpot at .75) and I had an issue with the idle hanging at 2000 RPM. I switched the settings back to stock. I?m not worried about tuning much else on the car before the next race except this issue.

I have no tuning experience so any and all help is appreciated.

[jw44]

Make sure you set the torque decel switch to disable. It's under Engine>Idle>General.

[Mavereq]

I disabled the torque decel switch. Now the RPM drops faster but it drops below idle now. I know I need to make adjustments to the dashpot but am not sure what does what.

[Mavereq]

Any advice on dashpot settings?

[veeefour]

You don't need to mess with the torque decel switch. I have it ON in my V6 turbo project and it idles just fine. You need to work on your airflow.

What mods? Post a tune...

[Mavereq]

Zero mods so far. Stock everything. I’ll attach a tune when I get on my laptop.

[veeefour]

Zero mods and problems? Seems to be something not tune related.

[Mavereq]

The problem was slow decel. Now the problem is the rpm drops below idle too far.

[veeefour]

Your problem is not tune related - they decel quite normal in stock form. You need to revise your swap - not sure what you did there but fixing other problems with a tune is not going to work.