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how can i check with the diablo predator if my truck is running to rich or not.
You can't. You need a wideband a/f gauge to get a reading. What mods do you currently have that you think your Jeep is running rich?
 

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diablo predator question

i have noticed that after i had my catalytic converter replaced . it seems as i am buring more gas. i told t he service manager. he said it was normal for this with a new cat converter. and that it will some miles before the carbon can build up again, i posed the question, earlier to see if their was a way to check this my self.
 

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i have noticed that after i had my catalytic converter replaced . it seems as i am buring more gas. i told t he service manager. he said it was normal for this with a new cat converter. and that it will some miles before the carbon can build up again, i posed the question, earlier to see if their was a way to check this my self.
Have someone drive behind you, do a couple WOT pulls and tell them to look for black smoke. If you have alot of black smoke, you're running rich.

As E asked, what mods do you have?
 

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Ideally you never run too rich at part throttle as the pcm will always correct your fueling to stoich.
You can monitor how much work the pcm is doing in order to achieve stoich by looking at your long term fuel trims. Ideally they will swing between -10 to +10 %. If you see a large positive value 20%+ then the pcm is adding this much fuel in order to get stoich a/f, negative values and it is removing fuel.
There are no options for monitoring wot (open loop) fuel in the predator.
 
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i have noticed that after i had my catalytic converter replaced . it seems as i am buring more gas. i told t he service manager. he said it was normal for this with a new cat converter. and that it will some miles before the carbon can build up again, i posed the question, earlier to see if their was a way to check this my self.
Yup, gotta build up some carbon before you're mileage is going to be correct.

Really?

Its amazing the stuff that dealers will spew these days.
 
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