The cold start valve is fine, because the car starts good when it is cold and ildes at higer RPM's until it warms up. I checked the OVP fuse and it is perfect. I am not sure how to diagnose a bad OVP, but the ABS and airbag lights are not on and when I took out the OVP fuse to check it, the ABS liht turned on. this makes me think that the OVP is ok. Also, I have replaced the rotors and plugs within the last 200 miles. Sorry to sound ignorant, but what do you mean by "cap"?

Matt

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1988 260E