[MB SC Elise]

Thanks Phil! Much of this is still new to me & am learning as I go along. I appreciate the input & will look into your suggestions.

The plugs are new & should be fine, but I'll look at them again.

I'm not aware of any misfires. If so, wouldn't that throw a CEL?

The alt bracket has been changed & the belt is tight (so I do not think it's slipping).

What would cause the dumping of fuel into the exhaust?

I'll shoot a message to Tony at PES.

Thanks Again!

Originally Posted by turbophil

There's something odd beyond just the dyno with those graphs. The TQ curves are goofy, as is the HP... I think you've got an issue that may be related to your tune with that bad AFR line. You need to fix your AFRs and then redyno to see the real story. Perhaps you have a dirty MAF, bad coil, or plugs if not the tune. Don't be happy just because your car is pig-rich- safe. That graph should be a sign that you need to do some diagnoses... You can use a thermo gun to shoot your headers to be sure that you're not mis-firing, dumping fuel into your exhaust. Dbl check that your belt is not slipping too.. If you determine no belt slip, no misfire, and sensors are feeding the right information, then it's time to investigate the tune...

If you think your car feels good now, wait till you get whatever issue you've got there sorted out

Good luck,

Phil