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Old 19th May 2016, 13:31   #71
rathlindri
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BIG thank you to T-Cut for this guide to diagnostics. Using it I have discovered my ZT CDTi is only reaching 72 degrees so the thermostat must be stuck open. Going to get a Renault 5 inline one installed....cheers!
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Old 24th March 2017, 16:40   #72
Brunty
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Default Digital Temperature Readout

Put car into diagnostics mode and took it for a drive to Aberystwyth, over the mountains and back. Temperature went as high as 93 degrees at a couple of places but seems to run 86 - 90 most of the time. Just testing it out as it had a new head,gasket, stretch bolts, cam belt, and water pump before I purchased it. No loss of coolant and done over 400 miles this week including motorway. (At legal speed limit!) Don't half motor.

Are these the temperature ranges I should expect?
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Old 24th March 2017, 19:57   #73
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Quote:
Originally Posted by Brunty View Post
Are these the temperature ranges I should expect?
All around normal IMO. The 86C could be seen as slightly low unless you were free wheeling at the time.

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Old 24th March 2017, 20:42   #74
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Thanks T Cut,
I pay to go up hill, but always go FOC downhill, best managed so far, over 5 miles in neutral from top of Dinas Mawddwy, down Dolgellau byepass, pay for petrol one way only! Bit of a chance going around the bend by Cross Foxes, have to avoid braking to carry on FOC.
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Old 24th March 2017, 20:55   #75
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Thanks T Cut,
I pay to go up hill, but always go FOC downhill, best managed so far, over 5 miles in neutral from top of Dinas Mawddwy, down Dolgellau byepass, pay for petrol one way only! Bit of a chance going around the bend by Cross Foxes, have to avoid braking to carry on FOC.
If it gets really steep then don't coast. Put it in gear and it will use NO petrol as the ECU shuts the supply off.----
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Old 24th March 2017, 21:06   #76
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Thanks for that, always gone downhill in neutral right from the age of 16, my Triumph Tigress had a neutral finder and pretty sure my Rover 90 had one as well. That's what my mum taught me to do! But if you are sure the 75 wont use petrol, will try to adjust my driving habits.
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Old 24th March 2017, 21:59   #77
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Originally Posted by Brunty View Post
Thanks for that, always gone downhill in neutral right from the age of 16, my Triumph Tigress had a neutral finder and pretty sure my Rover 90 had one as well. That's what my mum taught me to do! But if you are sure the 75 wont use petrol, will try to adjust my driving habits.
It is illegal to coast in neutral.

All modern ECU's shut the fuel supply off, when there is no demand for engine power and the engine speed is greater than tick over.
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Old 25th March 2017, 09:21   #78
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Illegal? Legal implies a law is broken - which one then?
Not saying you should coast - as said the engine switches off the injectors on overrun, provided its over 1800 rpm or so.
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Old 25th March 2017, 09:42   #79
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Coasting is not directly illegal or against the law. Circumstances of a situation however could lead to prosecution due to coasting. If you are involved in a car accident and you were coasting at the time by having the gears in neutral, if it was found that the coasting participated somewhat to the accident, it could be deemed that the driver had a lack of control of the vehicle due to coasting.

More on coasting:http://www.drivingtesttips.biz/what-is-coasting.html

At least it explains the 86C running temperature.

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Old 25th March 2017, 18:15   #80
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Both my Austin Westminsters had a free wheel unit.

Not only did they coast in "neutral" if you took your foot off the throttle but you could change gear without using the clutch.-------------
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