Hey Guys,

An update, the oil looked perfect so I decided to bite the bullet and take it to my local mechanic. He was concerned about the milky stuff under the cap but he did a compression test on all the cylinders, all within 1 or 2 psi, pressurized the cooling system which lost half a PSI over a couple of hours, checked the plugs again and found nothing....so this has now turned into a mystery! He had no idea what the cause could be and suggested, that if it was his truck, he would just use some sealant and keep an eye on it. I have never been 100% sure on the sealant stuff, but he says if I follow the directions on the can exactly I won't have an issue. Anyone else use it?

Thanks again

 

Did you find out if it was leaking coolant here or what this was?

 

I believe that was the evap drain for the ac. Since its been 100F here the AC is running all the time when I run the truck, I was able to get my hand in the back there and it did not smell like coolant.

The cylinder one misfire is appeared again, but tonight when it cools down Ill get my meter out and check the resistance of the coil.

 

I'm more concerned w/ the coolant loss and where it's going. Did you see any coolant on the cardboard you put down?

 

I looked at the cardboard this morning and all I noticed was one small puddle however that was from the evap drain, I am 100% certain about that. I pulled up tome of the carpet and it was dry as a bone, so my thoughts of a leaky heater core were wrong. Its a mystery!

 

Well hopefully someone has some insight on where it's going.

 

For the misfire you could try checking the plug cables and see if somehow it is rotted or has melted and is arching somewhere else. The coolant, Im still putting money on a slow leak somewhere, you just have to find it which is the problem. Fill it up and drive it around for a bit to get it all warmed up then take every light you can find and go over every inch of the truck and see if anything is leaking or dripping. It may be pooling up somewhere you cant see.

 

Yeah, ok...

http://www.consumeraffairs.com/news0...m_dexcool.html

Now DexCool is the worst, but ALL radiator fluid becomes quite acidic as it ages. Fresh coolant is not corrosive, but over time it becomes so...

 

does your truck have the coil packs? if it does switch cylinder 1 and 2 and if the misfiring cylinder changes than the problem is with the spark. I would also switch plugs. my 3.7 gave a misfire code and I replaced the plugs and it went away. Old plugs looked fine though.

 

check hoses for the coolant leak, probably a split in a hose that opens up as you drive.