My car did something new today
#1
My car did something new today
Not certain if this is a new feature but after driving around today with several stops and upon returning home and after shutting the car off, I noted the engine cooling fan was still running. In eight years it has never done this and in fact I can't remember the last time any car I have owned in the last 15 or more years has ever had the fan run after turning the car off. I waited several minutes and still it did not turn off so I turned the car on and then off and the fan turned off as well.
Glitch or is this a new feature?
Glitch or is this a new feature?
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Agreed, or if you don't have a reader handy but have an IR thermometer you can check temps in various spots, including in front of and behind the thermostat prior to disassembly.
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Don B (05-12-2017)
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Yes it has NEVER EVER done this before. I'll keep my ODB dongle handy and monitor temps just in case.
#9
It's a 2008 4.2 XKR with relatively low mileage, no heavy traffic but yesterday was fairly hot low 90s, I had been driving for less than 1 hour but had run out of methanol. Maybe it is time for a killer chiller...
#10
It is just bizarre that it has NEVER done this before, ever.
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You still have the tune from me in the car, right?
One of the modifications in the tune is that the fan starts at lower temperatures, and spins a bit faster than standard. Helps to cool down the intercooler circuit, to limit heak-soak when you are parked up or sitting there idling.
One of the modifications in the tune is that the fan starts at lower temperatures, and spins a bit faster than standard. Helps to cool down the intercooler circuit, to limit heak-soak when you are parked up or sitting there idling.
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It's nothing to be concerned about really.
The standard operation is that the fans can run after shutdown, if the engine coolant temperature and ambient temperature are above a certain threshold.
With our tune that threshold has been lowered a little bit.
Might be that you haven't had hot enough days before for the fan to run. Hot summer days in Australia >40°C the fan in my XJR would run for a little while after shutdown, same in the Land Rover. Also if you shutdown the engine and turn the ignition back on, the fan will run. That's pretty normal for hot conditions.
The standard operation is that the fans can run after shutdown, if the engine coolant temperature and ambient temperature are above a certain threshold.
With our tune that threshold has been lowered a little bit.
Might be that you haven't had hot enough days before for the fan to run. Hot summer days in Australia >40°C the fan in my XJR would run for a little while after shutdown, same in the Land Rover. Also if you shutdown the engine and turn the ignition back on, the fan will run. That's pretty normal for hot conditions.
#17
Did it again today, only once and this time I did not power cycle and let the fan run and it indeed turned itself off after about 5 minutes. I have been monitoring ECT over the past week and have never seen it above 210F, typically it sits around a peak of 208F. I suspect all is well and that it is either due to increased ambient temps or Cambo's tune.
#18
Did it again today, only once and this time I did not power cycle and let the fan run and it indeed turned itself off after about 5 minutes. I have been monitoring ECT over the past week and have never seen it above 210F, typically it sits around a peak of 208F. I suspect all is well and that it is either due to increased ambient temps or Cambo's tune.
#19
About 89f, not as hot as it has been or is going to be. It's about 98f now. I'm going to go with Cambo's fan mod. More importantly, my original concern has been relieved which is the fan is working and not coming on for no reason.
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Sean W (05-21-2017)
#20
Jahummer I thought you were running Velocity tune, when did you get Cambos tune?
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2008 XKR Convertible, (mods: AlphaJagTuning ECU Tune , 1.5lb pulley, (200cel cats( are now melted), xpipe, Bosch 001 pump, 180 Thermostat.
Drag strip : 7.9sec 1/8mi 90 MPH . 1/4 mile 12.55 at 112.98mph
432rwh Dyno on Mustang Dynometer , Approx 511 crank HP.
2013 XJ 5.0 SC (Alpha Jag ECU, TCU tune, crank pulley), 600+ HP, 11.6 sec 1/4th mi 122mph, 7.6sec 1/8th mi
2008 XKR Convertible, (mods: AlphaJagTuning ECU Tune , 1.5lb pulley, (200cel cats( are now melted), xpipe, Bosch 001 pump, 180 Thermostat.
Drag strip : 7.9sec 1/8mi 90 MPH . 1/4 mile 12.55 at 112.98mph
432rwh Dyno on Mustang Dynometer , Approx 511 crank HP.
2013 XJ 5.0 SC (Alpha Jag ECU, TCU tune, crank pulley), 600+ HP, 11.6 sec 1/4th mi 122mph, 7.6sec 1/8th mi