low heat

[sante]

cucv no heat

guys, thank tried it all, no heat, just luke warm
btw still hard to start, unles using ether, i no i shouldn't but once u start it in the am it good all day, then i start over in the next morning,. Remember i have acompound fx of the tib/fib from my harley accident so, i need to work very carefully and outside. It was 2 bellow yestaerday, one shot ether, nothing so i charged batteries (one at time) will attempt today, I guess heat is no big deal if truck won't start.
sante

 

[blzrgb]

If both hoses coming from the firewall are HOT, it's circulating.
I agree with the other guys, it's the blend door.

 

[dhedden]

If it is hard starting after sitting all night but starts the rest of the day, even a cold day, you may be losing your fuel prime. Do you park facing uphill by any chance? If so, park it downhill and see if it starts easier. It may be a leaking injector pump or weak diaphram on your lift pump allowing the fuel to run back to tank. That was my biggest problem till I finally replaced the IP.

 

[blzrgb]

This may sound wierd but it's true. My hard starting once was a combo of starter drag and weak batteries. Someone else can give more info than me, but the 6.2 needs a certain amount of cranking RPM's to pressurize fuel through injectors.
Maybe someone will chime in with more info.

 

[Kellyboy]

Bumping an old post to help those who are looking for help now. The aftermarket aluminum heater cores leave a 1/4" gap on both sides of the core letting cold air pass by them rather than through them. I used the foil heating duct tape to close off the leak and it makes a huge difference.

 

[GunnyM1009]

The aftermarket heater cores allow more air to escape around the sides of the heater core instead if being forced through it. If you can find a original core it will fix your problem. If not then sealing the gap left will help this is what I plan on using. http://www.amazon.com/Silicone-Gasket-Adhesive-Weatherstripping-White/dp/B00002NA46?tag=ihco-20 no way a heater core should get above the temp rating.

 

[Redneck92]

Had the same problem as dhedden discribed. Chenged heatercore and afterwards the little flapper in there stopped working corectly. It didn´t close completly and so it blew only warm instead of hot air.