Hard starting or won't start [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: Hard starting or won't start


spring48
03-31-2009, 05:13 PM
I have a 1984 Chevy Blaxer with a 6.2 diesel. I have bled the air out of the system at the fuel filter, I hit the glow plugs and the try to start it. I have white smoke comming out of the exhaust but does not start. I have repeated these steps several times and has not started. Ran a good set of batteries down trying to star it. The unit has been plugged in all night and its only 48 -50 degrees out really not cold and it won't start. My concern is if it won't star now what will it be like when its really cold as I am in Ohio and it get cold in the winter. I just accquired this vehicle. Please help I'm at my whits end Thanks

0lee
03-31-2009, 07:38 PM
Did you check if the glow plugs are actually working? Do they get power, are they burned out?

6.2 Gal
03-31-2009, 08:00 PM
Are you SURE that your starter is good? I had an expensive Bosch that seemed fine,
but it was not. I ordered a $100.00 starter that jdemaris, from here recommended and it has been starting like a charm ever since.

It was a gear-reduction starter from dbelectrical.

spring48
03-31-2009, 08:27 PM
I have a 1984 Chevy Blaxer with a 6.2 diesel. I have bled the air out of the system at the fuel filter, I hit the glow plugs and the try to start it. I have white smoke comming out of the exhaust but does not start. I have repeated these steps several times and has not started. Ran a good set of batteries down trying to star it. The unit has been plugged in all night and its only 48 -50 degrees out really not cold and it won't start. My concern is if it won't star now what will it be like when its really cold as I am in Ohio and it get cold in the winter. I just accquired this vehicle. Please help I'm at my whits end Thanks


I have check and I do have power to the glow plugs but have not done a contenuity check on the yet. But even at that its really not that cold should start without the glow plugs as it was 57 degrees last time I tried it.

0lee
03-31-2009, 08:38 PM
It might start without glowing at that temperature if it generally does start very well, but that would take quite a lot of cranking. Chances are good that it doesn't.

Glow plugs are the easiest to start checking. If you can be sure that they do work, there are more possibilities, like air leaks, lift pump, fuel filters, fuel shutoff solenoid. It can also be the starter or battery connections. If the starter doesn't turn fast enough (about 300RPM), it won't start.

dieselolds
03-31-2009, 08:42 PM
The glow plugs may appear operational but many times when they are less than perfect they will only heat up on the inside section of the heated sheath rather than the tip itself.

0lee
03-31-2009, 09:06 PM
Well, I was told the only sure way to check them is to take them out and put voltage on them to see how they glow. But that's not without danger.

4320Diesel
04-03-2009, 09:37 AM
I have check and I do have power to the glow plugs but have not done a contenuity check on the yet. But even at that its really not that cold should start without the glow plugs as it was 57 degrees last time I tried it.

when my glow relay quit i had my truck parked in the shop plugged in and the furnace cranked up to 30*C so it was hotter than summer in there and still no starting so i tryed spraying WD-40 in the intake still nothing so i waited for my relay and low and behold it started right away it will start at -4*C not plugged in but with out glow plugs my truck is lost so maybe your engine is like mine and needs its glow plugs i also wired up a manual control that works with the auto control so when theengine is hot and i park it for a half hour and it wont start (like it wheels over fast and still wont start) i just hit the glow plugs for about 4 missisippi's and it fires right up kinda strange when i have a 8630 john deere that will start with out being plugged in at -10*C and it dont got glow plugs

Jimmy2Legs
04-03-2009, 11:06 AM
do you continuity check with an ohmeter. if it's not glowing properly your resistance should be way up. on an 84 it should be around .8, on a slow glow system (not yours) it would be between 1 and 2... if it's not glowing properly then your resistance should be a little higher. if you get no reading, or one thats approaching infinite then your glow plugs are fried.

my truck does the exact same thing. a puff of white smoke, cranks fast enough (when my batteries are freshly charged, as they're toast from charging so much fixing the truck, sigh) and even sounds like it's gonna catch. no air in my system, IP was good when it was put in.

80Sierra
04-03-2009, 01:43 PM
How are your fuel filters? I recently plugged my sock filter off in the tank and it caused all kinds of havoc related to starting.