Conversion to carb issues
Thread Starter
|
1st Gear
Joined: Mar 2024
Posts: 1
Likes: 1
Conversion to carb issues
There's no reason for people to be nasty mean and rude when a man asks for help in a question I'll be logging out of this and never coming back
Last edited by Creeklife; Mar 31, 2024 at 01:36 PM.
Hotshot
Joined: Jun 2015
Posts: 12,771
Likes: 2,420
…and will shut off in an accident. I’d run it through the inertia switch.
Fleet Mechanic
Joined: Mar 2014
Posts: 1,926
Likes: 116
From: Saskatchewan Canada
Hope it's not too late to change your mind and keep the EFI.
The electric pumps are of the high pressure in tank variety and can deadhead a considerable amount of pressure. That's why a bypass regulator is your only hope and the pressure differential between the 100 PSI those pumps can develop and the 3 to 5 PSI a carb requires is simply too much to regulate reliably. Further, the PCM which runs the EFI system does a clever trick which shuts down the fuel pump if the distributor tach pulses disappear. Between these two problems, a carb conversion represents a serious fire hazard.
If disregarding safety is the right thing to do, grounding the fuel pump test point at the EECIV test connector will run the fuel pump with the ignition on. Please consider the preceding information carefully before doing this.
The electric pumps are of the high pressure in tank variety and can deadhead a considerable amount of pressure. That's why a bypass regulator is your only hope and the pressure differential between the 100 PSI those pumps can develop and the 3 to 5 PSI a carb requires is simply too much to regulate reliably. Further, the PCM which runs the EFI system does a clever trick which shuts down the fuel pump if the distributor tach pulses disappear. Between these two problems, a carb conversion represents a serious fire hazard.
If disregarding safety is the right thing to do, grounding the fuel pump test point at the EECIV test connector will run the fuel pump with the ignition on. Please consider the preceding information carefully before doing this.
Thread
Thread Starter
Forum
Replies
Last Post
Charles2703
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
9
Jun 23, 2014 07:35 PM
KsCop
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
10
Dec 3, 2013 08:07 PM
KsCop
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
4
Nov 19, 2013 05:29 PM
whisler
1980 - 1986 Bullnose F100, F150 & Larger F-Series Trucks
29
Mar 17, 2012 10:55 PM
