Fuel PUMP!!!!!
Thread Starter
|
Posting Guru
Joined: Jun 2003
Posts: 1,854
Likes: 1
From: Des Moines, Iowa
Fuel PUMP!!!!!
need help!!
i have an electric fuel pump on my truck added by previus owner, and i have replaced it 2 times now... what is going wrong? any ideas why he would add an electric fuel pump? the 400 is rebuilt now with eldelbrock intake holley 750 performence roller rockers cam. and headers. will the stock mecanical pump go back in place and flow enough fuel? can i get a high flow version? what can be going wrong with these pumps? i have a a fuel filter before the pump and everything, also it is hooked up to a switched 12v source. need help fast! i have to get back into town for my birthday! thanks!
i have an electric fuel pump on my truck added by previus owner, and i have replaced it 2 times now... what is going wrong? any ideas why he would add an electric fuel pump? the 400 is rebuilt now with eldelbrock intake holley 750 performence roller rockers cam. and headers. will the stock mecanical pump go back in place and flow enough fuel? can i get a high flow version? what can be going wrong with these pumps? i have a a fuel filter before the pump and everything, also it is hooked up to a switched 12v source. need help fast! i have to get back into town for my birthday! thanks!
Senior User
Joined: Oct 2003
Posts: 347
Likes: 0
From: in a house
the old stock pump may have been too weak for the 750carb. maybe he was picky on saving 2 or 3 horseshow many miles were on the motor? do you have a filter between the carb and pump as well?
I upgraded to a 600cfm and lost all fuel pressure at the end of the 1/4" mile loosing power. I put in a fuel pressure gauge before I found it out. all I did was bolt in a new replacement(under 25bucks I think) and problem solved. it only dropped to about 3 psi. is that enough for your 750? I'm not sure, but I don't see why not
I upgraded to a 600cfm and lost all fuel pressure at the end of the 1/4" mile loosing power. I put in a fuel pressure gauge before I found it out. all I did was bolt in a new replacement(under 25bucks I think) and problem solved. it only dropped to about 3 psi. is that enough for your 750? I'm not sure, but I don't see why not
Thread Starter
|
Posting Guru
Joined: Jun 2003
Posts: 1,854
Likes: 1
From: Des Moines, Iowa
the pumps quit working and the engine would stall out because of lack of fuel. i returned one under warranty. they would just stop motor and everything, if i turned it off, then on they would make a thud sound. i don't think they cloged up but i don't know because i didn't take it apart. i have a second filter between the pump and carb and it is a see through type. i don't see any crud in it. it is a carter 5-7 psi electric universale style pump.
Thread Starter
|
Posting Guru
Joined: Jun 2003
Posts: 1,854
Likes: 1
From: Des Moines, Iowa
well i was pricing new mecanical holley pumps and edelbrock pumps and they cost just as much and the holley electric pumps, so now i am thinking i would like to stick with an electric pump. any ideas on what i am doing wrong? or what might make this work better? thanks.
Trending Topics
Thread Starter
|
Posting Guru
Joined: Jun 2003
Posts: 1,854
Likes: 1
From: Des Moines, Iowa
what would it take to run this pump? http://www.jegs.com/cgi-bin/ncommerc...97&prmenbr=361
the holley red fuel pump is what i want. what is ment by 3/8 npt fittings? how can i run this in my standard fuel lines and system?
also i am going to buy that relay kit too hopefully i can keep this pump running longer than a month.
the holley red fuel pump is what i want. what is ment by 3/8 npt fittings? how can i run this in my standard fuel lines and system?
also i am going to buy that relay kit too hopefully i can keep this pump running longer than a month.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
3 Best / 3 Worst Parts of Modern Ford Ownership
Brett Foote
10 Amazing Upgrades That Solve Common Ford Truck Owner Headaches
Pouria Savadkouei
Every 2026 Ford Engine Explained
Brett Foote
10 Ugly Ford Trucks That We Still Kinda Love
Joe Kucinski
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
Thread Starter
|
Posting Guru
Joined: Jun 2003
Posts: 1,854
Likes: 1
From: Des Moines, Iowa
ok now i can't deside what to do. i talked with a tech at jegs, and one of the reasons i am burning pumps would be because of the pump mounted under the front tank is good but when i switch to rear tank it is to far away and it has to pull fuel to far and thats why it could be going bad. anyone heard this? so now i am back to thinking about a mecanical pump. so what do i need to look for behind the block off plate? what should be there for the mechanical pump to work? need help fast, i need this truck back on the road.
Senior User
Joined: Oct 2003
Posts: 347
Likes: 0
From: in a house
just take off the block off plate. remove your coil wire to dist and bump the engine till the cam eccentric is at it's lowest point or the lobe to the top. use sealant and place your gasket on the pump and start the top bolt followed by the second you will feel tension on the pump as you tighten it up evenly. good luck
Thread Starter
|
Posting Guru
Joined: Jun 2003
Posts: 1,854
Likes: 1
From: Des Moines, Iowa
whould there be any reason this cam eccentric would be gone or non-functional? also some of these mecanical pumps don't say specific applications, they say something like SB ford or BB ford. so should i get bb or sb?
Senior User
Joined: Oct 2003
Posts: 347
Likes: 0
From: in a house
the eccentric is held in blace by the cam gear bolt so it should be there. unless the guy that built the motor didn't put it back on for some reason. it looks like a shallow cup about 2" dia.
you would want the small block pump.
you would want the small block pump.
Senior User
Joined: Oct 2003
Posts: 347
Likes: 0
From: in a house
I take back the sb choice. I checked and only the 335 series engines use the same pump which is the verticle bolt pattern. so if you get the SB pump you would maybe selling it to someone with a 302. sorry Tex