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Old 06-17-2000, 12:37 AM
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I just replaced the 10 amp fuse on the OVP relay today. It seems to have settled the rough idle problem I have posted a few weeks ago. Should I replace the whole relay? I used dielectric grease on all the contact points to seal out dust and water. I ordered a new OVP and a new fuel pump relay. I am going to replace these as prev.maintenance on the car. What causes the OVP fuse to blow? Will it also blow the relay itself? Thanks, Joe

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Old 06-17-2000, 01:06 AM
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Join Date: Apr 1999
Location: Toronto, ON, Canada
Posts: 113

I would also like to know if my OVP relay is working properly..I have a 1988 300E W124. The fuse on the OVP relay is not blown...but this OVP seems like a very common problem. Is there a way to test the OVP relay to make sure it's working properly?

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Old 06-30-2000, 05:53 PM
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Thanks benzmac, I replaced the OVP and now the car idles so smoothly. I guess that it must have blown. What can you do to test the OVP? Thanks, Joe

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