![]() |
![]() |
#701 |
Post Whore
![]() ![]() Join Date: May 2015
Location: Alabama
Posts: 14,632
|
Re: Project "Popeye"
what kinda gas you running in it?..octane?
__________________
Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver Last edited by mongocanfly; 10-13-2019 at 02:30 PM. |
![]() |
![]() |
![]() |
#702 |
Registered User
![]() Join Date: Jul 2006
Location: Ozark, MO
Posts: 4,887
|
Re: Project "Popeye"
Just 87 octane that I had in a safety can. I plan to go fill it up with 91 ethanol free and see if that helps. Is that what you are thinking?
Also going to bump my idle speed down a hair and play with the timing.
__________________
'20 Silverado Trail Boss ~ '17 Tahoe ~ '79 K15 Sierra Grande ~ '76 Blazer 2wd ~ '71 Cheyenne swb ~ '55 Pontiac Safari ~'50 3100 bagged ~ '80 Wife ~ Late model kids
|
![]() |
![]() |
![]() |
#703 |
Post Whore
![]() ![]() Join Date: May 2015
Location: Alabama
Posts: 14,632
|
Re: Project "Popeye"
Yeah...its one solution...but may not fix it...
I copied this... Dieseling is a common problem, especially in warm weather or when the engine is hot. In this case, it is usually caused by running "cheap" gas with inadequate octane. In this case it can usually be remedied by switching to a higher octane fuel. In milder street engines, another big cause for engine run-on is having the idle set too high, or the carb is misadjusted which requires the idle speed screw to be screwed-in too far to allow the engine to idle. When the idle screw is screwed-in too far, it opens the throttle plates too wide and actually pulls fuel through the main jets a little, so when you shut the engine off, the inertia of the spinning engine still pulls air (and some fuel) through the carb and into the cylinders and the heat built-up inside the combustion chambers is enough to light a few of the cylinders at random to keep the engine spinning and sputtering. Again, this is especially true with fuel that isn't high enough in octane. The more the octane, the less volatile the fuel. Even though the key is off, the engine won't stop sputtering because the throttle plates are opened up enough to still pass a little fuel and air Fuel injected cars don't have any Dieseling or run-on problems because the fuel is electronically pushed to the injectors via an electric fuel pump, and the injectors electronically fire, so with the key off, the fuel delivery completely stops. Carburetors aren't electric, so even when you shut off the ignition, the inertia of the engine still rotating is still sucking-in a little air and fuel, and as long as it is still rotating
__________________
Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
![]() |
![]() |
![]() |
#704 |
Registered User
Join Date: Jan 2010
Location: Titusville, PA
Posts: 3,585
|
Re: Project "Popeye"
You sort out trans controller? I haven't gotten any dieseling with my carbed LS on crap gas. Last SBC I did was pretty good about it and hot starts. My first truck I did 355 with crap heads dieseled and hot started like crazy. All used eddy 600 cfm carb. Congrats, enjoy driving it really loved seeing this build.
__________________
51' 99toLife finished 2011,355 sbc,5speed, patina, redoing whole truck, inter, bags, etc http://67-72chevytrucks.com/vboard/s...d.php?t=382481 49Hardtimes s/10 susp- bagged, vortec sbc, 5 speed, patina, sold http://67-72chevytrucks.com/vboard/s...d.php?t=594874 VIDEOS https://youtu.be/E8zHhjgS_lA https://youtu.be/E8zHhjgS_lA Geronimo 54' LS engine, static drop IFS, Client build, just about done http://67-72chevytrucks.com/vboard/s...62#post7399162 52' 3100 Slowly in progress, will be painted two toned, have 235 with a t-5, lowered OG frame Other projects, 49' farmuse 3100, killer Patina, will be slammed, LS engine, full done interior up next! www.coffeeandcustoms.com |
![]() |
![]() |
![]() |
#705 |
Registered User
Join Date: Dec 2018
Location: Winnipeg mb canada
Posts: 18
|
Re: Project "Popeye"
I read thru this whole build in a couple days... man your truck is addicting! good job i love your truck!
|
![]() |
![]() |
![]() |
Bookmarks |
|
|