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Kennedy lift pump installation http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=98&t=39362 |
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Author: | Gypsy62 [ Fri May 06, 2016 1:46 pm ] |
Post subject: | Re: Kennedy lift pump installation |
After struggling with picks to (succesfully) remove the OEM connectors, I removed that fuel line, and was shocked to see color-coded "easy removal tabs" on the stock connectors! Ummm, tempted to say... why hasn't anybody mentioned this fact anywhere? Do I have a freak line, or are those push-tab release connectors common and stock? Green tab on connector above tank; Yellow tab, other end of same line on connector above rear diff. Spare yourself time and grief! PICS IN POST BELOW. -Due to the underwhelming search-engine algorithms on LJ, to help reduce both search-aggravation and thread-redundancy I encourage "Thread-Starters" to include relevant topic-specific keywords at the tail of their first post. Subsequent "Posters" can always supplement additional keywords- KEYWORDS: (VIEW ENTIRE THREAD); fuel-pump, Kennedy fuel pump installation, installing fuel pump, kennedy, inline, in-line, fuel-line connectors, air in fuel, air-in-fuel, fuel-supply problems, fuel supply troubleshooting |
Author: | undrgnd [ Sat Jun 04, 2016 1:38 am ] |
Post subject: | Re: Kennedy lift pump installation |
Hi Gypsy 62. Any chance you can reload the pics. They are all broken. Cheers Chris |
Author: | Gypsy62 [ Wed Jun 15, 2016 1:36 am ] |
Post subject: | Re: Kennedy lift pump installation |
From my location, pics still appear on thread. Is it possible that photobucket is only permitting viewability from my IP address? |
Author: | acuboy [ Fri Dec 09, 2016 1:58 pm ] |
Post subject: | Re: Kennedy lift pump installation |
Sorry for the noob-ish questions, but I'm going to try to tackle this job in the next few days and I have limited mechanical skills. So, with the quick release fuel lines do they have problematic quick release connectors at the tank itself? I bought a kennedy lift pump in hopes that I wouldn't have to drop the tank, but I want to eliminate the known air leak areas. Assuming the fuel line issue is resolved is it really necessary to mount the pump near the tank? Are there other areas along the fuel line that are known to be problematic for leaks? It just seems like it would be easier to mount the pump in the engine bay. And sorry for this next question... Why is it necessary to power the pump from the wire that is only active for 20 seconds when the ignition is engaged? Is there a similar power source easily available in the engine bay? Thanks, everyone. With the cold mornings I'm starting to get quite a bit of air in the system and I'm sick of bleeding the jeep before heading to work. |
Author: | flash7210 [ Fri Dec 09, 2016 8:08 pm ] |
Post subject: | Re: Kennedy lift pump installation |
I use a facet type pump in the engine bay. It works great. I think the kennedy might be a bit too big and works better attached to the frame rail. |
Author: | WWDiesel [ Sat Dec 10, 2016 10:56 am ] |
Post subject: | Re: Kennedy lift pump installation |
acuboy wrote: Sorry for the noob-ish questions, but I'm going to try to tackle this job in the next few days and I have limited mechanical skills. So, with the quick release fuel lines do they have problematic quick release connectors at the tank itself? I bought a kennedy lift pump in hopes that I wouldn't have to drop the tank, but I want to eliminate the known air leak areas. Assuming the fuel line issue is resolved is it really necessary to mount the pump near the tank? Are there other areas along the fuel line that are known to be problematic for leaks? It just seems like it would be easier to mount the pump in the engine bay. And sorry for this next question... Why is it necessary to power the pump from the wire that is only active for 20 seconds when the ignition is engaged? Is there a similar power source easily available in the engine bay? Thanks, everyone. With the cold mornings I'm starting to get quite a bit of air in the system and I'm sick of bleeding the jeep before heading to work. The factory fuel pump relay/system powers the fuel pump for 15-20 seconds when the ign. sw. is first turned to the on position, then it powers / runs the pump continuously as soon as the engine starts up... There is no need to change the OEM fuel line fittings if the lift pump is installed inside the fuel tank as they are designed for positive pressure applications and will not leak air into the fuel system... Dropping the fuel tank is a little bit of work to access the tank module change out, but it provides the cleanest trouble free factory like system available... |
Author: | Gypsy62 [ Wed Jan 11, 2017 3:24 pm ] |
Post subject: | Re: Kennedy lift pump installation |
UPDATE: JANUARY 2017. My jeep has been undergoing major surgery the past five months as time & task has permitted. I just wrapped for post-tbelt testing and had a fuel-supply issue. I isolated my virtually unused shiny new Kennedy pump to confirm operation: ZIP. Whirls like a wizard but no flow. PO'D at its premature failure, I just spoke to John at Kennedy: THESE ARE NOT SELF-PRIMING!!! What is the point of this thing if you can't rely on it to pressurize the ENTIRE fuel system? It's useless for sparing the battery/starter: A. If you're changing fuel filters or servicing the fuel head and the line backflows dry to the tank. B. If you're drunk-err, I mean distracted and run out of fuel. No way would I have chosen a non self-priming pump for this application. Sure, my fault for assuming that it was, but I just erroneously trusted that any aftermarket pump being discussed on LJ for lift purposes would be self-priming. Therefore, NO WAY do I recommend these Kennedy pumps! %#@&[×* !!! I'm not entirely abandoning my position that an external pump has some advantages over an in-tank pump, but now I may grudgingly burn the kennedys cost and replace it with the type of heavy-duty SELF-PRIMING pumps used in agricultural spray applications. I'm toooo familiar with them from WVO systems in pre-pstroke fords; they're indestructibly reliable, but you have to dial-in the correct pressure down from 45psi. I'll also research pressure-correct SELF-PRIMERS and report back. In-favor of the in-tank, I have to say KJ tanks are very easy to drop and dangle to the right-side permitting fairly speedy and painless access to an in-tank pump when necessary to service. |
Author: | flash7210 [ Wed Jan 11, 2017 7:23 pm ] |
Post subject: | Re: Kennedy lift pump installation |
A check valve in the line would prevent fuel drain back. I use a facet pump. It's self priming and has a check valve. Sorry, I don't remember the part number. |
Author: | WWDiesel [ Wed Jan 11, 2017 8:59 pm ] |
Post subject: | Re: Kennedy lift pump installation |
Absolute best option; put in an-tank pump and FORGET IT!!!! PROBLEM SOLVED!!! I don't understand why some insist on toying with these external fuel pumps that always seem to give problems at some point and time! Not to mention all the mounting and location issues... Most of the external in-line pumps cost more than the in-tank pump anyway!!! |
Author: | Gypsy62 [ Wed Jan 11, 2017 9:59 pm ] |
Post subject: | Re: Kennedy lift pump installation |
The Kennedy didn't die, it just needed to be primed (which is unacceptable to me). Yeah, obviously the in-tank option has advantages, too. Probably more. I may go that route. My normal bias for external pumps doesn't really apply here: A. Ease of access for installation & service: these tanks are easy to drop. B. Being able to source a greater variety of pumps. C. Multi-purpose pump configuration: utilizing valves/lines, being able to use the external pump as an independent transfer unit. Besides, in order to maximize that function it would require an on-off switch, not just the ignition-on burst. Again, I'm shocked this kennedy brand of non-priming pump earned it's own thread. BUYER BEWARE: DON'T USE THE KENNEDY, OR ANY OTHER NON SELF-PRIMING PUMP. After purchasing one new and investing time, energy and money into installation, I've repeatedly suffered priming issues, imho compared to any non-priming external pump an in-tank pump is a 10x better option. I may mount the Kennedy somewhere as a dedicated transfer unit, and keep a squeeze-primer next to it #&%@ ! On the upside, if I do go in-tank then at least I've already bypassed the first 2 funky OEM fuel fittings. |
Author: | GordnadoCRD [ Thu Jan 12, 2017 9:36 am ] |
Post subject: | Re: Kennedy lift pump installation |
I'm just curious why you didn't prime the kennedy you had with the priming pump at the fuel filter head. We already know they will pull from the tank to the filter.... |
Author: | Gypsy62 [ Thu Jan 12, 2017 12:25 pm ] |
Post subject: | Re: Kennedy lift pump installation |
Because I did not know that the Kennedy wasn't self-priming and wanted to confirm precisely why I wasn't getting flow solely using the ignition-on as a power-primer. I still can't be 100% certain that there wasn't some crimping/constriction occurring above-tank where the modified fuel line made its 180 to route forward. Now, at least that possibility has been eliminated. Anyway, I'm self-disgusted that I bought and installed a non-priming pump. However, since I've already plunged headlong into the rocks of stupidity I'm going to reinstall it and insert a quality check-valve downstream. Waste less money on a partial solution, and the pump's fittings and wiring are already installed. (Thanks to Flash for the check-valve reminder. Infuriation can veil the obvious) A quality non-primer is certainly better than nothing, and as long as the fuel gauge doesn't take a surprise dump I have no plans to run it dry. Of course, you are correct; the manual primer is always available. I'm just PO'd that I'd have to use it at all. |
Author: | acuboy [ Thu Jan 19, 2017 2:11 pm ] |
Post subject: | Re: Kennedy lift pump installation |
If anybody is looking for a kennedy lift pump I have a brand new one to sell. I ended up going with the in-tank solution and missed the window for returning the kennedy pump. I'll probably throw it on ebay in a week or so. If you want just pm me and I'll give you a good price! thanks duncan |
Author: | mass-hole [ Thu Jan 19, 2017 4:07 pm ] |
Post subject: | Re: Kennedy lift pump installation |
It's really not worth skipping the in tank pump. I mean the thing is about as OEM as you can get. Dropping the tank is NOT hard if you have a floor jack. The only thing I've heard is getting the new pump to twist in to the locking tabs can be tough, but all I had to do was put my knee on the pump, put my weigh on it, and then use a piece of wood and a hammer to give it a few taps and it clicked in. |
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