Drive Better?

[justin82]

I've been going on little drives after work....just to take my mind off things....is it me or does the car seem to drive better once it gets warmed up?

thanks

 

[Mustang5L5]

I notice no difference really with mine. Might want to check codes to see if there is anything stored

 

[justin82]

what would checking the codes say?

 

[mikestang63]

what would checking the codes say?

if there is anything wrong with the motor, sensors, relays, and other components

 

[JD1964]

Before normal operating is reached the system is in open loop where fuel control is fixed by the tables programmed in the ecu. Normally, when the engine reaches operating temperature the ecu switches to closed loop. In closed loop the ecu takes measurements from the O2 sensors to manage fuel mixture.

It's possible you notice it running better once warmed up since closed loop comes into play.

 

[justin82]

gotcha!

 

[stykthyn]

Mine is a smelly beast no matter what the engine temperature is.

 

[88LXSleeper]

Mine is a smelly beast no matter what the engine temperature is.

Are your cats gone? I think that is why mine stinks.

 

[stykthyn]

Yeah. I

Are your cats gone? I think that is why mine stinks.

yeah. I'm putting new ones in when I redo the exhaust.

 

[General karthief]

Whats this stinking thing ya'll are going on about?
89 gt no cats, no stink
Had a 92 convertible no cats no stink, this one still had the air pump too, gt air pump long gone.

 

[Mustang5L5]

I just kept my cats. I live in a nanny state anyway. It's "for the children"

 

[JD1964]

Been over this before but here goes again. What Tstat are you all running? Anyone running a stat cooler than the factory spec 192 degree may not even be entering closed loop

 

[Mustang5L5]

I've read on some reputable sources that the fox ECU enters closed loop around 140-150 degrees.

 

[JD1964]

I had heard otherwise.

 

[Mustang5L5]

I'm not 100% sure

 

[mikestang63]

170 degrees is what I recall

 

[JD1964]

I wonder why the stock Motorcraft thermostat is a 192. Did they just pick that number randomly? It seems random, doesn’t it!? Those engineers, they mess with your brain every time.