Half throttle going up hill = open loop?

[55Test]

I notice that my 98 Civiv EX (D16Y7) will go into open loop just going up a hill at half throttle or sometimes less according to my Ultragauge. I'm pretty sure a car will go into open loop at wide open throttle, but at half throttle? Is that normal?

 

[Rand]

enriching the fuel mixture for high load? not sure.

 

[oggb]

Possibly fuel enrichment to help keep the combustion chamber temps under control.

 

[gathermewool]

What RPM?

 

[Hokiefyd]

Originally Posted By: JRed
Possibly fuel enrichment to help keep the combustion chamber temps under control.


This is my guess. It's going into fuel enrichment mode to control knock.

 

[artificialist]

The manufacturer's programming determines at what TPS% the engine goes into open loop. Manufacturers can place that number wherever they want so long as the car meets smog and fuel effeciency requirements.

 

[Lead Shoes]

If you have the 98 ex, your engine is the d16y8 v-tech, not the y7 non vtech, unless you swapped the engine.

But that is a weird thing for it to do...

 

[55Test]

Originally Posted By: Brenden
If you have the 98 ex, your engine is the d16y8 v-tech, not the y7 non vtech, unless you swapped the engine.

But that is a weird thing for it to do...


Canadian EX, which I guess is equal to the US LX model

 

[mechtech2]

Seems a little low [1/2 way], but I guess it's the way they programmed it. This should also be RPM and temperature dependent.