1997 Dodge 5.9 stalls when hot at idle

[Deachster]

I've searched some and cannot seem to find a good answer. My truck was running a little hot (like on the white line just before the red mark) so I stopped driving it last fall and let it sit till I had time this spring. Prior to that, occasionally, when it was hot it would stall at idle. The truck would always restart, and if I use the foot on brake and gas method I could always get it home. I did start it once a week over the winter and drive it a block or so and let it reach close to normal temps.

Today, we finally got a chance to work on it. We replaced the thermostat, the coolant sensor (which was actually physically broken on the top where the wire connects) the Idle control valve, and the TPS. We've also within the last week replaced the spark plugs and air cleaner.

The truck will run normally, with plenty of pickup for something with 249,000 miles and idle. As the truck approaches 200 degrees, it ceases to idle and stalls. You can still get it to start by giving it gas, and again it will run and shift normally until you let off the gas and then it will stall even going around a corner.

Also we hadn't driven it far yet but I'm not sure it's still not going to run "hot" if we drove it very far I saw temps of over 200 on the dash gauge and 220 on the system scanner I had on it while driving it.

Has anyone experienced this and possibly be of any help?

Thanks,
Deach

 

[Bmore76]

Just wondering if you ever figured this issue out. I have the exact same issue going on and not sure how to fix.