Originally Posted by
kingtal0n
You can get a $20 0-5v transducer from ebay (pressure -15 to 15psi or 0 to 30psi) and use that 5v analog signal the same way you use a wideband sensor input (through the EGR or similar) to import the data into scanner,
in other words. You can log fuel pressure (or oil pressure, or crankcase pressure, etc...) for $20 a pop
Also. I cant see the tune on this computer. But i have a feeling the answer lies in the transition between PE and BE or VE and PE. basically what I did to my VE map was tune it to increase in richness slightly(63-84KPA), so I can delay PE first. That way it doesn't need PE to get extra fuel 'suddenly'. Then as I approach 85KPA I pull the VE fuel out so PE does it's job. Then, the same for BE, give a slight bump in the VE line between 95-105KPA then let BE do the work from 105+
Theres a delay and you get to set the delay. The thing is, if you ask for "NO DELAY" then when you step down gradually at low RPM it could flood easily and quickly (hurts throttle response) if the VE map isn't perfect. So intsead I use a longer PE delay so the fuel creeps in a bit more slowly and make sure the VE map carries the transition. Sometimes you just want a little fuel for part throttle and on a turbo engine that happens at very low throttle percentages, you can get 85KPA with 37% TPS for example on my engine. So I keep it out of PE from say 65-85KPA and use an VE map a/f ratio of around 13:1 or 12.8:1 and let PE bring that down to 12.4-12.0 as it crosses threshold of 86-100KPA