Todd, It is normal for the dwell to swing like that. That means your computer is working and receiving a signal from the O2 sensor. Mine will swing about 10-15 degrees. Make sure the car is warmed up (fans cycle on/off), set the dwell and then replug the hole and watch the dwell. Your goal is a average reading of 40-45 degrees. I'm trying to remember but I think a higher dwell reading will result in a leaner mixture and then result in harder starting but better performance off the line. A lower dwell reading will be richer and thus starting will be easier but some off line performance may be sacrificed. You will need a K-Jetronic fuel pressure test guage set to properly determine any fuel problems. I bought mine at NAPA for around $85. I see JC Whitney also has them. I believe John also will sell you a set. A good investment if you are planning on keeping the car and doing your own maintenance. Another thing is buy a book on Bosch fuel injection systems. One quick check you can do on the CPR is remove both hoses on top and look down inside the holes. One hole will have a screen or filter in it. Take a shop air hose and apply air to the opposite hole to blow out any dirt in the filter/screen. Reassemble, test for leaks, and take a test drive. Dave Sontos vin 02573 Virginia _____ From: dmcnews@xxxxxxxxxxxxxxx [mailto:dmcnews@xxxxxxxxxxxxxxx] On Behalf Of Todd Nelson Sent: Thursday, June 29, 2006 10:43 PM To: dmcnews@xxxxxxxxxxxxxxx Subject: Re: [DML] Is My Idle OK? Thanks John, I just recently replaced the O2 sensor, it's actually one of yours :-) I bought it quite some time ago and finally got around to installing it. I will take your advice and monitor the fuel spray from the injectors. Setting the fuel/air ratio is what I have been trying to do with little success. What seems to be most troubling is I can never get the reading from the dwell meter to be steady. It will usually hop somewhere between 35 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/