99 Doesn't like to start.

[islander]

I have a 99 F-350 that decided it doesn't want to start below 50 degrees. I had to plug it in and cycle it several time to get it to start. When it does it blows white smoke like crazy. My mechanic ( he has the same engine ) has changed the relay and says the glow plugs are working but I'm still having problems. Last winter my fuel heater shorted out and I have that unplugged.
Is that part of my problem? I never had to plug my truck in unless it was down to 15 degrees. It's not even cold here yet but will be 10 below before I know it. Please help me. BTW, I have no ability to tell what the codes are.

[justinlogue5_0]

I am not saying this is your problem my 99 was the same way. I put a Stancor relay on, all new glow plugs and checked ALL the wiring,volts,amps,ohms etc... All was good BUT the truck would still not want to crank unless it was plugged in. Now, I just installed my new modded 17* HPOP instead of the factory wore out 15* pump. It was 25* the other night, truck had not been cranked in a couple days and had fresh 15W-40 Rotella in it and after the plugs cycled one time only, it fired right up like it was a 90* day. No romps, nothing. need less to say I was pretty excited. Oh, and my ICP & IPR pressures were good while driving the truck. I am planning on upgrading my injectors so I went ahead and upgraded my HPOP. This truck now starting better was a bonus surprise.

[islander]

Thanks for the info Justin. That could be my problem. I'm getting ready to go start it now and see what happens. It rained and snowed all day yesterday and now everything is covered in ice. It's too early for this. Happy Thanksgiving to all.