So the truck cooled off, and it still won’t run very long. I’m thinking maybe a pump too.
CK5
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‘83 C10 4spd Scottsdale-Gone but not forgotten. New replacement loading...
- Thread starter GWeakland620
- Start date
Mild restoration build to use as a truck should be used.
Efi. Higher pressure helps alleviate vapor lock.
beags86
Eastbound and Down
6.5 swap?
Make sure to check that little fuel filter in the front of the carb. My crew cab was having fuel starvation issues when I moved from Idaho to Utah. It was at random times. I thought it was sucking air and changed out all the rubber line sections and it has a pre-pump see through filter and I even did a new pump and then it finally dawned on me about that little filter and it was plugged solid. Funny thing is that it would run fine sometimes and then other random times starve for fuel.
A co-worker said the same thing. That thing is getting checked tonight.
There's a lot of stuff going on in this picture I don't under stand.
What is that contraption on the thermostat housing? Just below that, kinda between the thermo housing and the heater hose, there something poking up with 2 hose barbs on it, what is that? I assume those don't pull vacuum? The EGR valve isn't connected to vacuum? Don't know enough about them, but would that cause trouble?
As @beags86 mentioned, the fuel line is kinky going into the carb and it looks like it's kinked under the heater hose too.
In my experience, vapor locking is more of a problem running slow speeds and stop and go driving. If you were running at speed down the road, there's usually enough fuel flow to keep it from happening. What temperature does the engine run at?
What is that contraption on the thermostat housing? Just below that, kinda between the thermo housing and the heater hose, there something poking up with 2 hose barbs on it, what is that? I assume those don't pull vacuum? The EGR valve isn't connected to vacuum? Don't know enough about them, but would that cause trouble?
As @beags86 mentioned, the fuel line is kinky going into the carb and it looks like it's kinked under the heater hose too.
In my experience, vapor locking is more of a problem running slow speeds and stop and go driving. If you were running at speed down the road, there's usually enough fuel flow to keep it from happening. What temperature does the engine run at?
beags86
Eastbound and Down
Fuel filter was definitely not good. Plugged up pretty good. Still had some fuel flow but couldn’t have been much. Also snapped a picture of the filter number for future reference.
Also replaced the jacked up fuel line with some 3/8 braided line (I know overkill), then wrapped it in thermal insulation for keeping the fuel temps down.
Unfortunately, that did not fix my issue. Fired the truck up and it idled for about 90 seconds, then sputtered out and died. Fuel pump is next.
Also replaced the jacked up fuel line with some 3/8 braided line (I know overkill), then wrapped it in thermal insulation for keeping the fuel temps down.
Unfortunately, that did not fix my issue. Fired the truck up and it idled for about 90 seconds, then sputtered out and died. Fuel pump is next.
I did have some good in that 90 seconds it ran. The truck idled a lot better and was a little more snappy and crisp when I rev’d it. Definitely needed to change that filter.
If it was mine, I would pull the filter again when you do the fuel pump, just to verify that it wasn't storing some junk in the line after the pump, which then went right into the new filter. Just peace of mind, to me.
And you should send more pics of the thermal vacuum switches in the thermostat housing and intake to @mrk5 . Then he can study the old smog crap parts...
Good call!If it was mine, I would pull the filter again when you do the fuel pump, just to verify that it wasn't storing some junk in the line after the pump, which then went right into the new filter. Just peace of mind, to me.
And you should send more pics of the thermal vacuum switches in the thermostat housing and intake to @mrk5 . Then he can study the old smog crap parts...
And yes, there is a lot of old smog crap on this truck still.
My truck has a little longer loop of hose from the frame to pump and one of those clear plastic inline filters there to catch junk before it hits the pump. Mine also has the fuel line ran down the outside of the frame so it makes it easy to setup that way.
Smog crap! Ewwww ick!
With it running 90 seconds and then dying definitely seems to indicate a fueling issue. Have you looked over the line between the tank and the pump for any damage? With that rusty tank, you never know if a previous owner might have put a filter in somewhere closer to the tank or something.
With it running 90 seconds and then dying definitely seems to indicate a fueling issue. Have you looked over the line between the tank and the pump for any damage? With that rusty tank, you never know if a previous owner might have put a filter in somewhere closer to the tank or something.
That there is the number one cause if engine bay fires... the plastic gets brittle and cracks. Do yourself a favor and replace it with a metal filter asap.
beags86
Eastbound and Down
I'm confused. I thought one of these was mandatory for every car and truck made with a carb?
Is that the glass version? That is a good one too.I'm confused. I thought one of these was mandatory for every car and truck made with a carb?
View attachment 308008
beags86
Eastbound and Down
Yeah, it's what I always use. But I also see a metric s*** ton of them on everything over the years.
I may drop the tank tonight and make sure I didn't pinch any lines when I put the new tank in.
I had that trouble and I couldn't get the damn line to not kink so I ended up putting a braided line on it. In my case it was the return line so it was causing really high fuel pressure. I found it by shining a flashlight up between the frame rail and the tank. When I lowered the tank I couldn't tell it was kinking.
This was on the crew cab with the EFI so I have a fuel pressure gauge. Been thinking I should put a gauge on the 73 too for reasons like you're running into and I've had.
