GMC 6.2 Pickup -82 Won´t start...

slappen · Nov 6, 2005

Hey all...I live in Sweden and have a huge (according to me) problem.
I bought my pickup with major electric problem, but most of it is now taken care of.The problem right now is that i cant seem to get diesel through the system at all..I put a container with a hose on the roof of the car and connected it where the primary filter hose goes to(I don´t know all the english terms.. /ubbthreads/images/graemlins/smile.gif...).There are still a few cables left to connect,but isn´t it so that if an diesel engine is able to glow it should be able to start?
Do i have to bleed for air manually or does it bleed it self when i run the starter?The starter runs perfectly and the plugs get warm. Please comment this and if u don´t understand what i mean I´ll try to explain again..
I´m really new to therse american cars....as u notice.. /ubbthreads/images/graemlins/blush.gif

Cadillacdiesel57 · Nov 6, 2005

The 6.2 has an mechanical lift pump to push fuel to the main fuel injection pump.To bleed the system,unplug the heavy pink wire leading to the injection pump.On the fuel filter housing,you'll see a small petcock.Unthread it a few turns.Then crank the engine over in 10 second inervals.After 10 seconds,let the starter cool off for a minute,and then try again.Once you see fuel squirt out of the petcock,close it up and reinstall the pink wire leading to the fuel injection pump.Once you have the fuel filter housing bled,you can loosen a couple of the high pressure steel lines leading to the injectors.Just loosen 3 or 4 and crank the engine over to get fuel through the lines.Once you see fuel there,tighten them up.

Then you can restart the vehicle.

Hope this helps.

Good luck /ubbthreads/images/graemlins/smile.gif

Greenie · Nov 6, 2005

The truck has electrical problems - I wonder if the fuel solenoid is getting power. That pink wire on the injection pump should have 12 volts when the key is on, testing with a light, right?

arveetek · Nov 10, 2005

Yes, the pink wire on top of the injection pump should be getting 12v+ when the ignition is turned on. Also, an '82 model won't have any air bleed valves...they used two round spin-on filters, which makes it harder to get air out of the system.

Depending on which hose was disconnected and is now run to the bucket, it may not be getting enough fuel. The best way to get fuel to the injection pump would be to use a small electric pump and pressurize the system. Just relying on gravity feed to go through the filter and into the IP may not be enough.

Once you've determined you have fuel going into the injection pump and that the fuel cut-off solenoid is being energized with the key on, go ahead and try to start the engine with your foot to the floor on the throttle. It will take a while. Once a 6.2L gets airlocked, it can be a real pain to start. It may help to crack all the injection lines to see if you're getting any fuel when cranking the engine. Once they start to drip fuel, go ahead and tighten them back down.

Casey

GMC 6.2 Pickup -82 Won´t start...

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