2003 R50 wont start, temp reads hot though - MINI Cooper Forum
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Old Jun 18th, 2014, 08:41 PM
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2003 R50 wont start, temp reads hot though

Hi everyone, 2003 Mini cooper Base model. Automatic transmission.

Car will not start. When the key is turned, the temp needle shoots all the way to hot, though the car has not been moved in months (this is what put it on the sidelines- just getting a chance to work on it now), and it just doesn't sound like fuel is going in.

Other stuff that may help- There is a clicking noise coming from the Relays. A buddy tapped on the relays while I was cranking car and it started about 6 months ago. We let it run for about 30 minutes, and then it died again, and still doing the same thing. I figured RELAYS! so I replaced all of them. Still not the problem, though there is still that clicking noise almost like a solenoid?

video of this here. I'll post a video, once I figure out how to do it.
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Old Jun 19th, 2014, 05:16 AM
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If the temperature gauge goes up to max as soon as you switch on, then the ECU might read this as an engine overheat, even though in reality its not, but it is affecting the engine operation, maybe the temperature sensor has gone open circuit and needs replacing?
Modern day ECUs will read all the sensor inputs and act upon the information it gets back from them, it only takes one to fail to affect how everything else runs.
If the temperature reading was the reason the car was taken off the road to start with I think I would begin there as its your known fault area??
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Old Jun 19th, 2014, 01:41 PM
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Yes. This was the reason it was taken off the road. Wife pulled up to a stop sign, and car just shut off. I got there a few hours later to check what was wrong, and even though it had been sitting there for a few hours, the temp went up to top, red light on, and wouldn't fire. Except for the 30 minutes it ran with my buddy tapping on the relay to make it start it hasn't run since.
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Old Jun 19th, 2014, 01:42 PM
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Ill check the sensor to see how hard it is to replace. As you probably know, most everything is difficult to get to on the car without taking half of it apart.
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