Stalling when Hot....

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J

Jrdinger

New Member
Posts
44
Location
N 36.062 W 96.023
Okay, same 02 Freelander stalls in hot weather, stop and go traffic, or after four hours or more on the highway. Let it sit for an hour, and I'm good to go....
for a while anyway.

I have already replaced the filler cap, had the fuel system checked for pressure & it's okay.

Is the pump going? If it is, then why does it seem to happen in the heat, or after a long trip?

This little problem never comes up when its cool outside. It rained this spring every day for 28 days, and I never had a breakdown. The pump has never thrown a code.

This only happens in the heat. I already changed the thermostat, to no avail. As a matter of fact, I spent $1200 ( under warranty, thank god ) this spring having a shop look at it - they changed the entire intake manifold out, saying it was the problem. They had it for a MONTH, and didn't fix a thing!

My battle plan:

Pull the fuel pump and check it for cracks and blockages. I have been told by the dealer and my former mechanic that they have both checked it. Lets find out if they lied to me. Replace the fuel filter.

I think this has an under bonnet pump as well, can anyone confirm this? If so, where is it?

If anyone else has seen this problem, please point me in the right direction....

Thanks again,

JR
 
My 02 auto seems to behave badly when it's very hot - not too often this summer!
It had both fuel pumps changed at the start of this year (apparently) by the previous owner, and I've had a new MAF fitted under warranty in the last few weeks - this has improved things elsewhere massively, but not helped the "almost" stall.

Watching with interest!

Cheers

Ben
 
How hot is the engine when it stalls? Does the coolant boiling? Do the fans start when its hot or before stall?
I think the engine will stall if its overheats. The temp gauge in FL doesnt really shows the actuall engine temp so you cannot really count on it.
 
I think its KV6 by looking at his other thread about the gearbox (jatco) but it could be TD4 too :D
 
Oh its the KV6 - remember I am a merican... I dont think I have ever seen a TD4 in El Estados Unidos.

Mad Hat, can you supply any detail about the wiring problem you had?

How far off the mark is the temp guage in the FL, and can I get an aftermarket guage fitted to read the proper temperature? The guage have never come up above the 50% line, even on the hottest days. The fans go on and on after its been running for about an hour or so.

Think I should fit it for a remote Thermostat, maybe drop the temp about ten degrees?

I have noticed evidence of a little boil over when she shuts down on hot days
 
 
make sure , if yu get one, that it is thermostatically controlled - and that it stays on after engine shutdown to even out the temperature and stop localised hot spots forming.


HEAT SOAK EFFECT ON ENGINES


Your engine temperature is controlled via the cooling system with interplay between heat produced, speed of water pump and engine cooling fan all controlled by a thermostat. When the engine is switched OFF, the cooling system becomes inactive and the residual heat in the engine from the block, head and exhaust manifold are transferred to the coolant and other engine components. The engine temperature actually increases after a hot engine shutdown. This is called 'afterboil' or 'heat soak' and can be damaging to engine life.

As the following graph shows, the typical effect of a conventional cooling system is that over a long period the coolant is almost at boiling point until natural convection and radiation eventually bring the engine and coolant system back to ambient.
ewp_heatsoak_graph.gif

For an intelligent cooling system, an electric water pump and electric fan are controlled by engine temperature irrespective of whether the engine is OFF or ON. The effects of 'heat soak' are washed away in seconds as the cooling system continues to do its job whilst the engine is OFF.

A typical combination is to have a Davies Craig Electric Water Pump (EWP) and a EWP Electronic Controller.
 
I was just talking to dealer in Indianapolis about those very pump set-ups.

Do you think an auxiliary oil cooler would be needed, or would that be overkill? I also wonder, too if building small air dams into the engine compartment would be helpful. could bring the throug the side splash guards, mounted to the skid plate. It doesn't rain enough around here for me to worry about water. Even the lakes are dusty in Oklahoma.

I know if I can get it cool and keep it that way, I will be ahead of the game. I am just brainstorming here...

BY GOD, I SWEAR I WILL MAKE THE DREADED HGF A THING OF THE PAST, AND THEREFORE CHANGE THE NAME OF THE GAYLANDER BACK TO FREELANDER!
 
Well, lets back up a second since we are experimenting. Not everyone is going to be able to afford serious mods, nor have the courage to attempt them.

I am going to take a different approach and start small.

This afternoon I stopped at the local Auto Zone and picked up a bottle of Redline Watter Wetter. I looked this stuff online, and it has a pretty good reputation. After I dumped that in the ol' coolant' bottle, I decided to pull the skirts off of the inside fender wells, to get a bit more airflow in there.

Of course, this won't do me any good if I run over a cat or something, but if it helps, I will put stretched steel down there to keep the rocks and critters I run over out.

Tonight test run went well, with the dash guage reporting a few degrees cooler than normal. I will find out when it gets up to 95º tomorrow afternoon. It gets hot quick, so I won't be long deciding if I have made a difference.

If this doesn't work, I will look for more quick - and -dirty ways to get better ventilation under the hood.

As always, I will keep you posted.

JR
 
Jrdinger said:
When I say evidence, I mean a little spatter on the inside top of the overflow bottle - never lost an coolant, never had to top it off.
Click to expand...

There might be a small leak on the expansion tank cap that release more pressure than it should be. So the cooling system doesnt flow properly. KV6 thermostat is different to normal thermostat (look for thread where MHM posted pictures of it) and no one understand how it actuallu works ( I am still waiting reply from powertrain for explanation). Common problem with Hippo. Try to replace the cap first.

As far as I know but I could be wrong there is no remote thermostat for KV6.

I was thinking of bypass to make the engine even more cooler plus EWP would be great addition as well. Look for thread about HGF.

I also put Redline Water Wetter (blue) and somehow it uses less petrol but maybe just my imagination. Its only been there for two weeks. I will wait and see.

Some people cut the under tray to allow more cool air go inside the engine bay. Might worth a try too like you said you not worry about water.
 
please ignore my comment about water wetter result better fuel consumption...its a myth :D ... nah,its my imagination really...:D
 
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