$OD DFCO

[vandura95]

$OD DFCO
16197427


I have DFCO enabled and it comes on and goes off at the speeds set up in Tuener Pro.

How do you set DFCO to have less braking effect?

I would like the braking effect to be minimal to none.

[JeepsAndGuns]

If you dont like the braking effect then why have it active? The braking effect is the whole point of DFCO. If you want it to be minimal or none then turn it off.

[Fast355]

If you dont like the braking effect then why have it active? The braking effect is the whole point of DFCO. If you want it to be minimal or none then turn it off.

Open the IAC and advance the timing in the DFCO parameters.

[brian617]

Open the IAC and advance the timing in the DFCO parameters.

If Deceleration Fuel Cut Off is just that, no fuel being injected into the engine, then how does timing affect it?

[Fast355]

If Deceleration Fuel Cut Off is just that, no fuel being injected into the engine, then how does timing affect it?

You have a wet manifold fuel system with TBI. When you cut the fuel injectors there will still be fuel for a short period of time. Opening the IAC valve will reduce the vacuum inside the manifold and the engine braking effect as well as make the DFCO work for less time. When you are in DFCO you timing is typically -5* or 5* ATDC. At that point the lean mixture that is left is likely still burning as the exhaust valve opens.

[vandura95]

Open the IAC and advance the timing in the DFCO parameters.

Is this the correct IAC adjustment location?