Cold starting is a pain! what next...

[tonypagnano]

I have a late build 99 and if i dont plug her in shes a pain to start at i would say anything under 45-50 degrees. Just cranks a little bit slow sometimes then pops and studders and stalls, and eventually after tryin for a while it will start up and smoke like a freight train for a few minutes then clear up. I have changed out the Glow plug relay, changed the oil to synthetic amsoil 15w-40 weight. what should i start checking now? My dads work truck is a 2000 f350 and it starts fine on the coldest days... i cant figure it out.

[99 Red Stroker]

I was having the same trouble and I finally got mine fixed. I went threw the glow plug system totally. I was running 15w40 Rotella and I was do for an oil change and switched to 5w40 Rotella Synt. I started it one morning when it was 5 degrees above zero. It started and ran smooth with one cycle of the plugs. The lighter oil sure helped mine. Maybe someone else will chime in with some other ideas. When it warms up I plan on switching back to the 15w40. Good luck.
99 Red Stroker

[dantry]

i have the 6.0 and its actin the same way, i wouldn't mind hearin some info on this as well..... BUMP...

[bigcountrysg]

Check the glowplugs, and yes switching to a liter oil like 5w40 or you can just run 10w30 through out the whole year will work.

Yes I have posts on here about hard cold starts on my own truck. I know the glowplugs are done in my truck I have 161,000 miles on them. Also my glow plug relay some days has voltage on both posts and some days it doesn't. Also sometimes the wait start light on my truck will work and somedays it won't.