Hi everyone. I tried to search on many Civic boards but couldn't find an answer to this strange problem. I recently picked up a 92 Si but anytime I rev past 4500K the speedometer and the odometer stops working. After about 10 minutes of driving both come back on. I've checked fuses, wiring, battery, just about everything. Am I missing something simple?

 

Does this happen in Any gear at any speed above 4.5k?

 

From what I have noticed, this only occurs in 2nd and 3rd gear.