Did this happen all of a sudden or after you changed something ?
It sounds like a vacuum leak?
Have you tried backing the timing off a bit ? At 10 to 1 compression your kinda on the edge of what you can run on street gas, thats why i wondered if its been ok then this happened all of a sudden ?
I know i'm showing my age but this is the down side of EFI ... it complicates things when it comes to troubleshooting because you have this computer trying to correct things and you can get into a big loop that makes it hard to find problems. You need a genius at reading error codes like Pkrwud !
Easy cold starting and idle quality huh ? ... hmmm... I still like to open the hood and see an engine instead of a big pile of vacuum hoses and wiring and sensors !!
Whew ... hand me that fork after you're done
