Clean TDC sensor. Still won't start when damp - Page 2 - Renault Forums :: Independent Renault forum

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post #6 of 8 (permalink) Old 8th December 2008
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If the starter fails to spin the engine over, then maybe you need to start looking a bit further up the chain of events to start the engine.

One of the old favourites is oxidation on the battery terminals, leads or earth connections to the bodywork for both the battery and engine.

All these connections carry a high current when the starter is used. Any oxidation can lead to a high resistance connection that can't deliver enough current to spin the starter, or, if it does spin, the voltage drop can be too much for the rest of the electrics.

So even if the engine turns over, the rest of the system doesn't get enough 'juice' to operate, so it can't fire the plugs, so the engine doesn't start.

The voltage across the battery, even when cranking the engine, would look good, but there would be little left to run the systems connected 'downstream' of the faulty connection.

In a similar vein, a battery nearing the end of it's life can fail to deliver the goods, leading to similar symptoms. In this case the voltage across the battery would drop significantly as the starter cranks the engine over.
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post #7 of 8 (permalink) Old 8th December 2008
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If the engine isn't turning over then it's not the TDC sensor at fault,more likely a corroded connection to the starter motor.

From memory the starter is hidden right up at the back of the engine which is a bit of a pain to get to,but you need to try and pull the small wire off of the solenoid and see if it's clean.

If all seems well there,then it could a battery/starter/earth fault,but I'd start with checking the wire to the starter and go from there.

I'd rather push my Alfa than drive a BMW....
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post #8 of 8 (permalink) Old 8th December 2008 Thread Starter
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Originally Posted by bpowell555 View Post
It may be instead of being dirty the TDC was faulty - at about 25 its one of the lesser evils in the renault parts catalogue
lol. Yeah thanks . I have just ordered
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clean , damp , sensor , start , tdc

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