Originally Posted by
N8BENZ
Hi DJ. I may have met you at the Woodward Dream Cruise in 2019, as that was the last time I was there. I put a note in my phone that if I ever had a RCM issue, to contact you. I now live in Northern Michigan. My problem is that my Xfire will start, but all gauges freeze and all warning lights including "beeping" stay on (speedo says 45 mph while parked in my garage). The most concerning, is 15 seconds after starting, the Radiator Fan goes "Supersonic"!! as if the fan blades are going to break off from such a fast speed. This happened to me two summers ago, and when I disconnected the battery and reconnected, it fixed the problem. No such luck this time. Do you still think its the RCM??? My direct email is
averyweisling@comcast.net my cell is 248-240-3121. Would really like to chat. I can email or text you a 30 second video taken while sitting in my garage. Won't upload to this system. Thanks!
Wow, that's a new one, and I've been here Thirteen years.
DJ is seldom on here, and he's not known for live-on-the-phone advice, I would suggest you start a thread of your own with the above information. I think you may actually have an ECU issue. (Can't believe I'm saying that. It would be a simple matter to swap RCMs between your car and another car and see what happens, but, since the engine runs so the Engine Control relay is fine. MANY of us carry a spare RCM, I finally bought one last week. You might just order an RCM and see if that fixes it, and if it does or even if it doesn't, I'd send the old one to have him replace the relays and reflow the board, That is what I did, mine failed two weeks ago, I shipped it to him and he fixed it, but I also bought a new one, so I now have a spare. We all should have a spare crank sensor and RCM in our cars.
The speedo saying 45 is OUT THERE. The fan running fast implies the ECU is not talking to the fan module - but if the engine is running, the ECU has to be alive.
I don't suppose you jump started this car with another car, did you?
Or did you use some kind of plug-it-into-the-wall car-starting instant battery charger-booster? Those things are one step below hooking a welder up to the car.
WHat history is there with the car?
I've been here a LONG time, never heard this one. THe speedo is driven by information from the ABS module, the fan is operated by the ECU thru the FCM.
This just isnt making sense. Here's a question: Exactly WHICH warning lights are on?