lbaskball45

Hydrogen powered is more complicated then it is simple. 1thing to remmeber Gasoline burns, and hydrogen...well it explodes.

Hydrogen powered is more complicated then it is simple. 1thing to remmeber Gasoline burns, and hydrogen...well it explodes.

Heres couple of easy steps to try: Get a vacuum pump, plug the end to the egr valve, and pump it and see if it holds vacuum. If it doesnt hold vacuum, you may have replaced with another ruptured EGR valve. Clean the lines as people stated before. Lot of carbon gets built up. Lastly, check the EGR temp sensor. If that is bad, EGR may not function properly as well. Check for proper resistance. Common issues are the modulator going bad, the EGR diaphgram rupturing and/or carbon build up in the vacuum lines.

I have looked everywhere on the internet about the common problem that sc300 and LS400 have with their instrument cluster lights flickering adn then eventally not turning on. I too have the same problem with my 95 sc300. I have not found 1 solution to this problem.. My question is, does ANYONE know what the problem is? Is it the circuit board? If so, I grabbed a circuit board off of another SC400 from the junkyard of the same year, can I just replace that with mine? Or will that Kill the speedometer reading ? so to sum it up: 1) Is it the speedometer circuit board thats the issue? 2) Or is it the light bulbs and the needles themselves thats the issue? 3) Can I swap a new circuit board in to fix the problem? 4) Can I swap a new circuit board in without having to worry abou tthe mileage being changed? 5)Does the ECU keep track of the mileage of the actual instrument cluster circuit board? IF ANYONE can answer these problems, I would be greatly appreciated. I know that there are lot of places where you can send your instrument cluster to get fixed, but I want to know what the problem is so I can attempt to fix it myself.