In another post on "So What Did You Do To Your GMC Today?" I shared some engine problems I was having on the way down to the Spring Rally. Someone suggested that it would probably be better to make this topic its own post. So, I have attached the history on this topic from the other post in a PDF below.
In a nutshell, I traveled down to Vidalia for the Spring Rally. I took 3 days to get there. After driving more than 4 hours, when I would slow down or come to a stop, and then started to accelerate, the engine would shut down. This happened on the first two days getting down there. The third day was a short trip, just 2 or 3 hours long, and I had no issues. Each time I had this issue, it would not restart for between 10 minutes and 30 minutes.
This happened on the way back home as well. However, on the way back home, once I got past Dallas, it started to cool down outside, and was getting dark. I reasoned that I wouldn't have vapor lock running at night, so I drove all the way home non-stop except to refuel. No vapor lock troubles after dark.
I have since replaced my fan clutch, as well as the thermostat. I disconnected an electric fan I had purchased on the way down to the Rally. I had also replaced the Ignition Module in the distributor cap before I returned home. I have also replaced the carburetor fuel filter.
I have purchased an electric fuel pump to install near the fuel tank, but have not installed it yet.
I was thinking of installing a 3 port mechanical fuel pump to replace the 2 port pumps our rigs come with, and then run a return line back to the tank as I had heard that was helpful. Others thought it not a good idea because of potential fire hazards.
A new issue has since arisen. I drove the GMC to the gas station to put non-ethanol fuel in it. As I pulled out of my drive way, and onto the street, as I attempted to accelerate, it died. While rolling, I put it in Neutral and it fired right up. I made it to the gas station and back, and it stumbled a few times. It wasn't even warmed up yet. I didn't have much power as well.
Today I was tracing out the fuel lines to see if there was another fuel filter I didn't know about. I didn't find an inline fuel filter, but I discovered I have a 3 port mechanical fuel pump with line running back to the tanks.
I'm thinking I have a fuel delivery issue. Would a worn out or close to failing mechanical fuel pump cause my issues? Could something with the fuel return line be causing my issues? I'm in over my head here.
In a nutshell, I traveled down to Vidalia for the Spring Rally. I took 3 days to get there. After driving more than 4 hours, when I would slow down or come to a stop, and then started to accelerate, the engine would shut down. This happened on the first two days getting down there. The third day was a short trip, just 2 or 3 hours long, and I had no issues. Each time I had this issue, it would not restart for between 10 minutes and 30 minutes.
This happened on the way back home as well. However, on the way back home, once I got past Dallas, it started to cool down outside, and was getting dark. I reasoned that I wouldn't have vapor lock running at night, so I drove all the way home non-stop except to refuel. No vapor lock troubles after dark.
I have since replaced my fan clutch, as well as the thermostat. I disconnected an electric fan I had purchased on the way down to the Rally. I had also replaced the Ignition Module in the distributor cap before I returned home. I have also replaced the carburetor fuel filter.
I have purchased an electric fuel pump to install near the fuel tank, but have not installed it yet.
I was thinking of installing a 3 port mechanical fuel pump to replace the 2 port pumps our rigs come with, and then run a return line back to the tank as I had heard that was helpful. Others thought it not a good idea because of potential fire hazards.
A new issue has since arisen. I drove the GMC to the gas station to put non-ethanol fuel in it. As I pulled out of my drive way, and onto the street, as I attempted to accelerate, it died. While rolling, I put it in Neutral and it fired right up. I made it to the gas station and back, and it stumbled a few times. It wasn't even warmed up yet. I didn't have much power as well.
Today I was tracing out the fuel lines to see if there was another fuel filter I didn't know about. I didn't find an inline fuel filter, but I discovered I have a 3 port mechanical fuel pump with line running back to the tanks.
I'm thinking I have a fuel delivery issue. Would a worn out or close to failing mechanical fuel pump cause my issues? Could something with the fuel return line be causing my issues? I'm in over my head here.
