ok there are 4 coolant sensors, one in the back of the pass. side head, 2 in the water pipe under the intake (one towards the rear of the engine and one towards the rear of the engine) and the thermo- time switch. I know about the thermo time switch in the t-stat housing and I think the one on the back of the head is for the temp guage. what are the other two?? According to the FSM one is related to the o2 circuit (which one?) and I am not sure about the other one. can someone fill in the blanks for me... Richard 10246 [Non-text portions of this message have been removed] 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/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/dmcnews/join (Yahoo! ID required) <*> To change settings via email: mailto:dmcnews-digest@xxxxxxxxxxxxxxx mailto:dmcnews-fullfeatured@xxxxxxxxxxxxxxx <*> 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/