Weird noise...cured, but why?

piperdave · Dec 6th, 2012, 19:51

OK, so i joined he forum in May this year when the car had a big electrical failure. It also started making a throaty noise from the exhaust, accelerating between 1500 and 2500, then going quiet, which i could not explain.

Move on to now, and...its cold and the heater / water temp wasn't getting warm. I replaced the thermostate, and wow, the heater is back to its usual hot self, and the water temp runs as it should.

And.... the noise has gone! Why ?

Could it be that due to running cooler, the engine management has been adjusting the mixture, or adding O2, and this has been detonating in the system. The MPG is spot on, so....why?

Any thoughts people. Would like to know why this is.....

Cheers,

Dave

DrDeAtH · Dec 14th, 2012, 22:28

The night pixies have visited and fixed your car whilst you were sleeping perhaps?

Dec 6th, 2012, 19:51	#1
piperdave Member Last Online: Jul 7th, 2020 17:48 Join Date: May 2012 Location: Worthing	Weird noise...cured, but why? OK, so i joined he forum in May this year when the car had a big electrical failure. It also started making a throaty noise from the exhaust, accelerating between 1500 and 2500, then going quiet, which i could not explain. Move on to now, and...its cold and the heater / water temp wasn't getting warm. I replaced the thermostate, and wow, the heater is back to its usual hot self, and the water temp runs as it should. And.... the noise has gone! Why ? Could it be that due to running cooler, the engine management has been adjusting the mixture, or adding O2, and this has been detonating in the system. The MPG is spot on, so....why? Any thoughts people. Would like to know why this is..... Cheers, Dave __________________ Dave 1996 V40 1.8l Manual 5 speed, Petrol, Silver Dawn Metallic. Owned from 2004 (45,000mls) to present (196,718 mls)

Dec 14th, 2012, 22:28	#2
DrDeAtH Junior Member Last Online: Jun 3rd, 2018 22:00 Join Date: Sep 2012 Location: Hertford	The night pixies have visited and fixed your car whilst you were sleeping perhaps?

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