Post by: vastub on January 07, 2007, 06:04:00 pm
Anyways....
I have a 1986 Chev. K-10 Scottsdale that I bought from the second owner last summer. The origional owner replaced the 305 with a 350 but everything seems to "correct" based on what I see in the Haynes manual. It is equipped with a 4 bbl carb and mechanical fuel pump and has a single drivers side saddle tank.
I have driven this truck about 300 miles so far and it drove great. Then about a month ago it stalled out in the driveway, which has a slight incline, but the tank is full. I did some troublshooting and found that there was no fuel coming into the carb.
I blew into the line and heard the air bubbling in the tank. I replaced the fuel pump and filter (at the carb) and still wasn't able to to get any fuel delivery. I then drained, dropped and cleaned out the tank and replaced the sending unit and its three rubber fuel lines to the fuel lines.
The truck started up and ran fine. I drove it about 10 miles and parked it back in the same spot on my driveway.
Went to start it the next day and discovered that it wasn't getting any fuel again. I went out and got a glass fuel filter and installed it close to the carb and then hooked up an inline electric fuel pump.
When I turned the pump on with the truck off) I saw the glass filter fill completely up with fuel for 20 seconds and then all of a sudden, while the pump was still running, I saw the fuel get sucked back down into the tank.
I then removed the gas cap and tried it again, but now nothing seems to get any fuel flowing into the carb.
What else should I be checking? Is there some sort of vent that could be plugged?
Post by: Lt.Del on January 07, 2007, 09:21:00 pm
If no fuel then, I'd double check to see if pump was installed correctly so the crank hits the lever on the pump ok.
If still no gas, it has to be the lines. It is a very simple system. Are you sure there is no other fuel filter b/w the pump and tank??? some people put these things in weird places.
SgtDel
aka "Andy"
www.delbridge.net
1979 Big 10 383 stroker
1991 Blu 'Burb 3/4 ton 4x4
Post by: roundedline on January 08, 2007, 09:06:00 am
73-87.com/7387garage/driv...elpump.htm
Chris Lucas
www.73-87chevytrucks.com
www.captkaoscustoms.com
Project Su
Jimmy 2WD Project
Post by: vastub on January 14, 2007, 02:31:00 pm
I don't understand how this happened....is it possible that when I installed it the first time I didn't lock the rod up high enough?
The pump seems to be ok and when I pressed the rocker arm in a little bit (it's pretty stiff) some fuel out out of it, so I don't think it was damaged.
I had to wrap it up early last night because it started raining and I have a banquet to go to tonight so I'll try re-installing it tomorrow.
Thanks to those who replied so far, I really appreciate it.
Post by: vastub on March 18, 2007, 03:25:00 pm
First, I had replaced fuel pump....but it didn't fix the problem. Then I replaced the sending unit. It fixed the problem for a day.....but then for some reason there was no fuel output.
I took off the new fuel pump and based on some marks on it i thought that it had somehow not been connected properly when I replaced it (since I barely have an idea about what I was doing). I checked the pump by pushing on the lever and it worked, so I re-installed it.
So then, I started checking the lines and when I disconnected the large fuel line (after cranking the engine a bunch of times) there was a fairly large "pop", almost like when you disconnect an air hose. So now I figure there is a blockage.
I really start looking and I used a mirror to check the hoses coming from the sending unit and discovered that the big hose had kinked slightly and it was just far enough for it to get pinched betweed the tank and the botton of a support member on the frame.
This happened because when I replaced the lines during the sending unit replacement I left them each about 1.5 inches longer than the original lines. It was the only way I could get them to reach when nhooking the tank back up.
So I dropped the tank, cut the lines to the correct length.....and then they couldn't reach the connections.
By this time I was really aggravated and made the decision to remove the bed so that I could hoog them up. The bed is in good shape, but the bolts were not. I ended up having to cut off 7 of the 8 bolts to get it off but I got it done and fixed the lines. I reinstalled the bed with new bolts and the truck is running great now.
Hopefully this story will help other novices like myself and save them a little aggravation too
Post by: jseifert on March 19, 2007, 04:29:00 am