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Author Topic: Turning over very fast, not start  (Read 2392 times)

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Abiton

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Re: Turning over very fast, not start
« Reply #15 on: 22 March 2011, 21:31:25 »

I've had this sort of thing on ours, though I don't remember it turning over any faster than usual.

I'm amazed the starter motor didn't burn out during the many long foot-to-the-floor 'come-on-you-b****rd, start!' sessions during test drives before I discovered that a wire-to-wire short had killed the  coolant temperature sensor and was making the ECU believe that the engine was at -45.

I'd dare to suggest that this type of fault is one of a very few things that could cause this behaviour on a FI engine...
« Last Edit: 22 March 2011, 21:34:06 by Abiton »
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henryd

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Re: Turning over very fast, not start
« Reply #16 on: 22 March 2011, 22:14:16 »

my uncle has a volvo 960 24v and if he starts the car and reverses out of the garage then switches off then it will have to be left for several hours before it will even think about starting :-X
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Audi_Paul

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Re: Turning over very fast, not start
« Reply #17 on: 22 March 2011, 22:14:27 »

You dont need a fault temp sensor to have this happen, but yes if the car is fueling for -45 that definatly isnt going to help.

Because they have sendary air, they are not just fueling loads for a cold start, they are also fueling extra to keep burning the exhaust gas to heat up the cat while the secondary air pump is running, that is lot of fuel.

If you switch off before the end of this cold start period of extra fuel injection especially if you have just moved the car, say off a drive or out of a gargage you can get this. It spins over really fast and sounds like a broken cam belt because the oil is washed off the bores by the fuel and engine is genuinly low on compression, thankfully only tempory.

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