Car will not run without OVP plugged in. OVP is not located in back of your fuse box, it is near the Lambda in back of the battery on a 16V. If your OVP is bad, perf will be poor, and car might intermittently stall. Sometimes fuse on top of OVP can be good eventhough relay is bad. Pull relay out and shake it to hear if their are any loose parts in it. Also sand the contacts and plug it back in. the relay plugs in back of fuse box are dummies. The OVP would probably not cause your "blowing fuse" problem. Refer to my other post re your temp sensor test.
mrossi
85 Euro 16V