SS_Firehawk

Finally updating this. When the M370 was put in, I lost over 12 whp and there was almost no low end gain. I tested at least 3 times on diff days to confirm. But I don't think it was the M370 manifold that's the culprit. A few weeks ago I decided to test my pre cat O2 sensors. I was trying to get a mail tune from uprev and it was untunable because one of my pre cat O2 sensors was not reading correctly. I narrowed it down to the passenger side exhaust manifold O2 sensor. I just placed the part on order and will be waiting for it to come in. This is most likely why I've had that SES light with P0300 for the past few months. My car had absolutely no power under 2krpm, I had minivans pull off lights with more grunt than mine would. My gas mileage is averaging only 15.5 mpg, I can smell gas in my fumes, and I can hear the engine stumble. Looking at the logging info, the uprev tuner told me that the ECU isn't reading the AF properly, so to be on the safe side, it's just dumping as much fuel as possible. The explains everything that was going on. I'll be doing a followup after I get it fixed with new numbers. Now that it's summer though, power most likely be lower than the sool spring and winter days.

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