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18th June 2022, 15:48 | #1 |
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MG ZT-T 190 Join Date: Oct 2020
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V6 high idle,
Mk1 190.
Tick-over is high at 1300 on cold start dropping slowly to 1000. Temperate is very slow to rise to normal. Can sit 30 minute idling and only reach 65c from cold. Occasionally is hesitant to start when hot. Not sure if they are all related but .... Today managed 66c and overheated, not sure rad fan is working tried the air con trick and nothing. But I checked the coolant earlier so may have not tightened it fully.
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02 ZT-T 190 - 02 MG TF 160 - 03 MG TF - 115 - 04 MG TF 135 - 05 Discovery 3 4.4 V8 - 72 Series III 109 |
18th June 2022, 19:14 | #2 | |
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Quote:
Can I begin by checking a few details with you please. When you say "66c and overheated", how are you measuring the coolant temperature? What is happening to lead you to believe that the engine is overheating? When you say "tried the air con trick" do you mean pressing the windscreen demist button then checking that the radiator fan is running? Simon
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18th June 2022, 19:27 | #3 |
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MG ZT-T 190 Join Date: Oct 2020
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Temperature via live data from both Torque and PScan and thinking about I did check the water level before starting so numpty may not have tightened the cap as its was water and steam out of the cap
When you say "tried the air con trick" do you mean pressing the windscreen demist button then checking that the radiator fan is running? Yes
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02 ZT-T 190 - 02 MG TF 160 - 03 MG TF - 115 - 04 MG TF 135 - 05 Discovery 3 4.4 V8 - 72 Series III 109 |
18th June 2022, 19:35 | #4 |
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Thanks very much for the extra information Bill.
From experience I would not rely on what Torque and PScan is telling you, particularly as a temperature of 66˚C would not result in steam from the expansion tank. I'd recommend that you use the instrument pack diagnostics test no. 7.0. You say that your radiator fan is not working when you press the windscreen demist button with the engine running. Is your air conditioning fully charged with refrigerant? Simon
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18th June 2022, 20:18 | #5 |
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MG ZT-T 190 Join Date: Oct 2020
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Found PSCan to be pretty good on my TF but will take your advice and try the diagnostics.
And I know the temperature gauge isn't perfect but it always used to get up to 9 o'clock pretty quickly pretty quickly but not anymore. Which seemed to coincide with the idle issue. To be honest, I don't know as I never use the air con, hot weather is what the TF is for.
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02 ZT-T 190 - 02 MG TF 160 - 03 MG TF - 115 - 04 MG TF 135 - 05 Discovery 3 4.4 V8 - 72 Series III 109 |
18th June 2022, 21:38 | #6 | |
Doesn't do things by halves
Rover 75 2.5 Connoisseur Auto (1999) Dealer launch model. Join Date: Mar 2007
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Quote:
Please let me know the temperature showing on the built-in diagnostics whilst driving. The engine must be under load to obtain a meaningful reading which won't happen when idling. Simon
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