--- In dmcnews@xxxxxxxxxxxxxxx, "Rick" <rdevaux@xxxx> wrote: > > > I'm looking to retrofit a throttle enrichment circuit onto my PRV. > Does anyone have a schematic of the components and connections? > Thanks Sorry Rick, I missed this. Plus I've been out of town. This could be useful to Jim Reeves too, whose post I also missed until now. Pulling pin 11 (currently unused) low on the stock lambda controller will set a fixed FV cycle for nearly maximum enrichment. It can be further combined with the WOT input (the pin current number currently escapes me at the moment) to gain even more. You can easily use this pin for accel enrichment via a differential pressure switch measuring intake tract vacuum and venting through a calibrated orifice. Volvo later went this route and it beats using the CPR any day. With a bit more hardware you can also do electronic warm up enrichment and the CPR can be removed. For accel enrichment it works well but note using it will result in surpressing the lambda loop and result in a fixed output. If you want to use it for closed loop or warm up you'll need a seperate control element for PWM, then you can control lambda at any point you desire as long as you have a wide band O2S. If you go that far you might as well use the controller to do all three functions. Contact me if you need part numbers or more help. G To address comments privately to the moderating team, please address: moderators@xxxxxxxxxxx For more info on the list, tech articles, cars for sale see www.dmcnews.com To search the archives or view files, log in at http://groups.yahoo.com/group/dmcnews Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/dmcnews/ <*> To unsubscribe from this group, send an email to: dmcnews-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/