Quote:
Originally Posted by Tygen1
Opps, I forgot one thing...let me elaborate.
Less power means a higher TPS which the PCM thinks means a higher load which normally means pulled timing. Typically our PCM's are designed to not have as much ignition advance as they could run. Short of buying nice software to reporogram the PCM, I ended up fooling the PCM into thinking it was at a lower load, even if the TPS was high. You may have read some threads I had about the vacuum leak giving me better mpg. Once I got the wideband I found that I was not lean like I thought, it was simply just more ignition timing. The vacuum leak made the PCM not believe the MAF and therefore it determined I must be at a lower load and that advanced the timing to near max. When this was coupled with the HAI, that's when I started to see the nice low GPH's and tremendously improved highway mpg. The ZX2 is starved for timing. With the lean burn set up I am using now, I am just bleeding off voltage from the MAF, which no doubt makes the PCM believe there is a light load. So I see max advance when bleeding off voltage from the MAF.
This may help you, but I don't know how your Saturn will react?
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Thanks Tygen1. Saturns don't have an MAF, only an MAP and obviously IAT. I'll have to research how other Saturn owners are able to make the mpg gains.
I drove the car to the doctors today and when the engine was warm and idling, the GPH was around 0.35 which is lower than what I had with the HAI at 0.37.