Quick question

[Galant]

From my understanding in open loop a car should idle and drive perfectly by default. So if a car doesnt idle correctly and or stalls while in open loop mode then there is a problem with the car. Am i right?

Topic

[Galant]

bump

[Greg]

The computer uses the oxygen sensor’s input to regulate the fuel mixture, which
is referred to as the fuel “feedback control loop.” The computer takes its cues
from the O2 sensor and responds by changing the fuel mixture. This produces a
corresponding change in the O2 sensor reading. This is referred to as “closed
loop” operation because the computer is using the O2 sensor’s input to regulate
the fuel mixture. The result is a constant flip-flop back and forth from rich to
lean which allows the catalytic converter to operate at peak efficiency while
keeping the average overall fuel mixture in proper balance to minimize
emissions.

When no signal is received from the O2 sensor, as is the case when a cold engine
is first started (or the 02 sensor fails), the computer orders a fixed
(unchanging) rich fuel mixture. This is referred to as “open loop” operation
because no input is used from the O2 sensor to regulate the fuel mixture.
If the engine fails to go into closed loop when the O2 sensor reaches operating
temperature, or drops out of closed loop because the O2 sensor’s signal is lost,
the engine will run too rich causing an increase in fuel consumption and
emissions.

[Galant]

I already read that whole excerpt off google. I’m not asking about closed loop and how it fricking works. I asked if a car doesnt idle correctly and or stalls while in open loop mode then there is a problem is there a problem with the car.

[Timothy Salomon]

Yes. Cars that are operating correctly don’t stall either in open loop or closed loop.
Gmule was trying to help us go to the next step of why a car might run fine in open loop and then stall in closed loop.

[Greg]

[quote=”8gLover” post=166527]I already read that whole excerpt off google. I’m not asking about closed loop and how it fricking works. I asked if a car doesnt idle correctly and or stalls while in open loop mode then there is a problem is there a problem with the car.[/quote]

Since you asked such a vague question and you clearly have no clue as to what your dealing with I thought it would be helpful if we were on the same page. So in short Yes there is a problem and have fun finding out what it is.
I’m out on this one.

[Author]

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