What did you do to your pig today? (4 Viewers)

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Took a nice morning drive today in my pig. Started right up and drove perfectly for 25-30 minutes then after that stalling at idle at every stop unless I feathered the gas…a lot. 1985 2F engine with Holley Sniper EFI. Was thinking it was the EFI tuning but thought I would check out some physical things first. Also some exploring on the fill up issues I feel like I have been having at the gas station. Started with the two doors in the pictures! Pulled the fuel sending unit and the tank looks great. No chunks or floaties in the gas that I could see. The tank was very full. The sending unit I bought from @ToyotaMatt must not be registering exactly right because the guage said a bit above half. Tried a dry test by pushing up the float arm to full position and it still only registered slightly above half. Put it all back in then went to door #2. Pulled the vent hoses on both ends and they are not clogged. Was wondering if that was why it took so long to fill up at the gas station? Put that all back together. Then I went under the truck and pulled the pre-filter on the frame rail mounted fuel pump. All good there too. By this time it was a million degrees in my Las Vegas garage so my plan for the next time:
1) pull the fuel pump and see if the tiny little screen on the inlet side is clogged
2) pull the intake line from the tank and see if that is obstructed
3) run the pump in/out of a gas container alone without any other variable and see how the pump performs.
If all that is good then I will need to dig out the EFI manual and pretend I can figure out how to adjust the idle. LOL

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scrapdaddy said:
Maybe vapor lock? Sorry if you already stated, but what fuel pump, electric?
Click to expand...
Yes. Walbro GSL392 electric fuel pump that is mounted on the frame. Original kit purchased from Mosley Motors.
 
Gordobe said:
I did a clear, UV, tint on all 36 sq ft of glass and it made a noticeable difference. The black dash creates a significant amount of heat that is directed right to the front passengers.

At one point before the tint I measured the heat of the dash at 180 degrees. After the clear tint it measured 150 degrees. Although this test is subject to so many variables.

The odd thing that occurs is that with polarized glasses the reflection of light off of oncoming cars winshields is purple and sometimes clouds have a rainbow type look.

I think its the glasses???:cool::bounce:
Click to expand...
Different tint qualities look different through different polarized lenses. With my Maui Jim sunglasses and the SolarTek tint I put on my 100 I see no issues. With my same glasses and the tint in my sons car I see checkerboards and sometimes weird colors.
Click to expand...

I was a big fan of Duck's Breath Mystery Theater back in the 1970s, and they had a schtick called "Mr. Science" where Mr. Science explained that the the different states were different colors back before the 1940s, but polarized windshields now mad them all look the same. Thus the reason old maps from schools had color coded states.
 
DTC72 said:
Started right up and drove perfectly for 25-30 minutes then after that stalling at idle at every stop unless I feathered the gas…a lot. 1985 2F engine with Holley Sniper EFI. Was thinking it was the EFI tuning but thought I would check out some physical things first.
Click to expand...
Put a fuel pressure gauge right at the fuel inlet on the sniper. I do that on all my installs. Helps a ton trouble shooting.
 
@DTC72 is it building pressure in the tank? When I put the 3FE in my 40 mine was doing this (same pump), it ended up being the evaporator system not keeping up in the heat. You can test by removing the gas cap when it’s doing it, be careful though if under a lot of pressure. Temp fix is a early vented gas cap, long term fix is replacing evap system (most likely with later model parts, I used 60 stuff).
 
bobm said:
Miss Him! Great Comedian 😉🤣
Click to expand...
Yeah man. They filmed Uncle Buck near where I went to HS. I worked at a supper club and one of the waitresses there told me the movie bought her car to use in the film. Maybe in the HS parking lot scenes?
 
DTC72 said:
Took a nice morning drive today in my pig. Started right up and drove perfectly for 25-30 minutes then after that stalling at idle at every stop unless I feathered the gas…a lot. 1985 2F engine with Holley Sniper EFI. Was thinking it was the EFI tuning but thought I would check out some physical things first. Also some exploring on the fill up issues I feel like I have been having at the gas station. Started with the two doors in the pictures! Pulled the fuel sending unit and the tank looks great. No chunks or floaties in the gas that I could see. The tank was very full. The sending unit I bought from @ToyotaMatt must not be registering exactly right because the guage said a bit above half. Tried a dry test by pushing up the float arm to full position and it still only registered slightly above half. Put it all back in then went to door #2. Pulled the vent hoses on both ends and they are not clogged. Was wondering if that was why it took so long to fill up at the gas station? Put that all back together. Then I went under the truck and pulled the pre-filter on the frame rail mounted fuel pump. All good there too. By this time it was a million degrees in my Las Vegas garage so my plan for the next time:
1) pull the fuel pump and see if the tiny little screen on the inlet side is clogged
2) pull the intake line from the tank and see if that is obstructed
3) run the pump in/out of a gas container alone without any other variable and see how the pump performs.
If all that is good then I will need to dig out the EFI manual and pretend I can figure out how to adjust the idle. LOL

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Click to expand...
25-30 minutes might be just long enough to heat soak everything and start causing vapor lock. Are you running fuel w/ 10% ethanol?
Try switching to ethanol free fuel if you can. If you can't, put a quart of ATF in the tank whenever you are filling it up more than half.
 
samc2447 said:
Put a fuel pressure gauge right at the fuel inlet on the sniper. I do that on all my installs. Helps a ton trouble shooting.
Click to expand...
Yep! This ^^^ When I couldn't get my 3FE to behave there were a bunch of issues, but the final problem turned out to be an occluded return line. I had over 70 PSI at the rail.
 
tucker74 said:
@DTC72 is it building pressure in the tank? When I put the 3FE in my 40 mine was doing this (same pump), it ended up being the evaporator system not keeping up in the heat. You can test by removing the gas cap when it’s doing it, be careful though if under a lot of pressure. Temp fix is a early vented gas cap, long term fix is replacing evap system (most likely with later model parts, I used 60 stuff).
Click to expand...
Fun w/ fuel! When it gets hot there is so much vapor volume to deal with...
 
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