hard start in mild to cold weather
 

i have 94 12 valve 5 speed manual 90 hp injectors pump turned up intake.... i am having trouble with truck starting in mild to cold weather its starts right up but then whats to run rough and idle a lil blueish and grayish smoke once warmed up it runs fine. when i plug truck in i don't have this problem at all but i can't always have my truck plugged in

What's considered mild to cold weather for you?

Mine does the same thing. That's why they came with the plug.

Mild weather for me is like 45 to 0 F

more fuel will also make a truck start harder. those sticks probably arent helping anything just plug it in

Overall that sounds pretty normal. Keep it plugged in if you can, like already mentioned. If that's not an option, it won't really hurt anything, just warm it up before you get going. :tu:

timing and fuel pressure can also be big problems

heater grid in my opinion is not working

diesels need 3 things fuel air and heat- lack of heat will cause this nothing out of the norm. whitish smoke is just raw fuel as long as it goes away once warmed up nothing to worry about. plugging it in will raise that electric bill lol

I've never noticed any change in the electric bill, and I leave it plugged in half the day for half the year.

does the voltmeter cycle up and down a short while on cold startup?
if yes then it is most likely working , a more direct test would be placeing a inductive
ammameter around the load wire for the grid during warm up, it will draw quite a few amps, if nothing then it is open wich is possible but your truck would really smoke like alot and hard start in the cold for quite a while

good luck
scott:hellox:

Im also leaning twards grid heater as well .... if the grid heater is good then check the grid heater relays ... may only be getting half the power ... I can start my truck and it was 24 out side and fired right up ....
It shouldnt smoke all that bad ... that much unburnt fuel is not real good on rings either ... can start washing cylinders and contaminating oil with the fuel.... :td:

One question i haven't heard yet is what rpm is your truck ideling at when the motor is cold.

I agree check the grid heater.

If you do need to change it out consider going with a 24v style grid heater and a tunnel ram intake plenum for better flow (think cheaper version of the banks twin ram )