Fuel pump losing prime overnight. What would cause my cat 938g to lose fuel prime at night.

Fuel pump losing prime overnight Thanks again, I will keep posted on what I find. Customer: 2019 cascadia with dd15 losing fuel prime overnight. I probably should just do the whole thing, IP, new everything and be done with it, but that's expensive for me right now. sometimes it. Jump to Latest (overnight) and cause you similar problems starting. Put fuel in the tanks, it didn’t have this issue before the cam housing. 1 2. Paul I put a fuel pump on my 52 willys and it turned out to be a problem with a hose going from the tank to the metal line on the frame. That tells me that maybe it is the seal you spoke of because it might be shrinking with the cold. I'd crank it up and take off and it would run for a few There is so many places you could have a air leak, Fuel head,lift pump,Duel tank switch(O rings),At the fuel tank (O rings),Return line O rings,Dry rot fuel lines etcId say just start at the oldest part and work from there, I got mine from the Diesel store. then the only way it starts is with someone dumping gas down the carb while i turn it over. The tractor will start all day but It seems like after several days it should at least fire and stumble from pumping the throttle and fuel coming from the accelerator pump, but its just dead and cranks and cranks. Retest. When running it runs great and maintains speed to hit 60 Hz for as long as we need Fuel is meant to drain back to the tank its the way it is designed to work the fuel gets siphoned back thru the return line when the truck isnt running hence the fact it looses prime . If I unscrew the cap and turn the key, the housing fills right up, then I can put the cap back on and the truck starts up after a few cranks. Fuel line damage is a common cause of fuel pump issues (This could account for 90% of cases). If the truck is off for longer, I I am losing prime overnight and have extended initial crank times now. CFFFC112-A6C0-4E30-B278-452392D03482. This morning I tried pumping the hand primer, but it was hard to push and didn't seem to make any difference. I have a set of new replacement injectors in my parts stash, and have ordered a new fuel filter top/pump. I thought it was my fass filters on my lift pump so I changed them, was fine for a few days but then It started losing prime again. AZ_Chip. my jeeps fuel system seems to lose its prime after sitting more than a few days. A quick bleed and a couple dozen pumps and it will start right up and run fine. : This can be caused by fuel transfer pump check valve not seating, letting the fuel drain back,or it can be caused by an air leak in the suction side of the system, from the It’s fine during the day but loses prime overnight. A. 06 GMC 3500 DUALLY AFE stage ll TransGo, deep pan, de-badged, 65 Gallon replacement Aero tank, LBZ-mp, Kennedy pump, Cummins NT-855 PG270. By this time I'm convinced lines have to be bad, so I replace both lines from filter housing to pump. I havent I go to Chevy dealer and replace with acdelco this time. starts doing same crop again, losing prime overnight. I have a cat 3208 marine diesel that keeps losing prime to the injector pump. The pressure side of the fuel system will hold pressure fine. Reply reply My 2007. Home of Mazda3, CX-3, CX-30, 323, and Protege. Joined Nov 3, 2002 Location The easy fix is a lift pump or external fuel pump. The so called check valves in in the transfer pump arent to hold the fuel up to the motor they are just to supply fuel when running . I am assuming I need to check the return line that goes from You need to replace the lift pump which is mounted on the high pressure injection pump with three little bolts in a triangular pattern. There is a diaphram inside the injection pump that can crack. Works fine for 3 days. Could fuel draining back from the filter to the tank cause this? Is there a check valve I should examine somewhere? 1996 Int 4700, 175hp DT466, 5 speed, 2x Fuel pump losing prime. But it didn’t go on the ground. nope. I am assuming I need to check the return line that goes from the back side of the engine to the tank. Your pump may lose prime if there are leaks in the I always lose my fuel prime if I let the truck sit for more than a few hours. If the car sits for more than a couple of days, it's like the gas has all evaporated and drained back into the tank. DPE73120 Injector Installation Kit for 1990 - 1994 Ford 7. Bypassed the fuel water separator and I've got a 2015 D13 and I'm losing fuel prime completely randomly. 11,135 Satisfied Customers. Diagnostics: 1-Numerous O2 sensor codes (P0141, P0157, P0158, P0160, P0161) 2-Loss of prime on turn of key. After sitting overnight I get in to start and it just turns over but no fire. r/mazda3. 3L IDI Non Turbo Diesel Trucks PLEASE HELP Truck is losing prime overnight and hard starting!! Jump to Latest The problem with the truck in the article was the fuel injection pump. Thank you. Joined: Jul 2, 2008 Messages: 70. To rule out the possibility of a leak in the fuel line(s) or connections, I ran a direct 3/8 inch fuel line from the tank to the pump and another one from the pump to the fuel bowl. GM trucks are bad for rusting out metal lines and losing prime also. My feeling is the fuel pump lets pressure off and loses prime? 2. I have to crank and crank and crank, and lately, it's easier to just stuff an air hose But if it sits overnight it gets hard to get it started. Runs perfect until it sits overnight and problem repeats. It runs fine, but loses prime overnight, if I keep it inside it does not do it as bad. Transfer pump has been replaced as well as all fuel lines, tank flushed for debris, filter housing thoroughly checked, filters replaced. fruitcakesa Well-known member. Did it at 12 degrees out on a cold start, then 3 days later at 60 degrees after sitting two hours and today at 50 degrees after sitting an hour. Any ideas?? Attachments. Last few times we've run it seems like fuel system is losing prime after it sits overnight. I’ve got a 2006 C15 Acert that is getting air in the system on the suction side before the fuel pump. I have a 2000 peterbilt with a c-15 6nz motor and sometimes it will lose its prime overnight sometimes not. Nothing. losing fuel prime overnight. 06-27-2024, (Subject: Losing prime overnight/fuel pressure problem ) Post: #9. Air leaked in, the injection pump could not pump air, and it was necessary to bleed fuel pump losing prime? Discussion in 'Intermediate CJ-5/6/7/8' started by toy89yota, Jul 28, 2008. I started the engine, it idled fine for a minute, the knocking sound came back and even stronger, and the engine stalled. Swapped housing and injection pump, PLV in fuel rail. I do find the lose of prime issue seems to occur more often on level ground rather than the car Even if I subscribe to your logic, I would've said the fuel manager is after where the lift pump would be, but I didn't. Possible areas are loose hose clamps, or even a cracked line, After I thought I had solved my no start/no fuel issue, I now find that after sitting for just a little while, it loses prime. Once the truck is running, it actually runs pretty good. If you have good power under load, I would just install an electric fuel pump for priming before starting truck, similar to a cummins with electric lift pump but you I know the problem is that the secondary fuel filter housing is losing it's fuel prime. Works for about 2 days. have . Jump to Latest Bad news, the ip is now pissing out the bottom. yellowman99. Borrowed the MV (Mityvac) again and verified the filter holds vacuum with no lines attached and filter empty, ok. Not sure where it’s going but it won’t keep the fuel in the filter housing. We tried priming it with the lift pump many times and it wouldn't start. but others may be dealing with this, and I need help. 1994. DOM 10/73. I am trying to help diagnose a 9860 which is losing fuel prime overnight, also running rough. starts losing prime overnight like previous housings. I changes the fuel pump and still have the same problem. then it will start right up with If it's still losing prime I will replace the lines and the fuel pump. Only 1 psi fuel pressure,while cranking and can not pump it Losing Prime Overnight. Rawze Forum Reject (14171 Likes) Posts: 11,391 Joined: Jun 2013 : RE: Losing prime overnight/fuel 2019 cascadia with dd15 losing fuel prime overnight. By chatting and providing personal info, you understand and agree to our Terms I have a cat 3208 marine diesel that keeps losing prime to the injector pump. If you're sure that you're losing prime then air is getting in somewhere and allowing the fuel to go back to the tank. I have cycled the key several times to try to get fuel moving but still doesn't start. I still do not see any fuel leaking. Now what? Re seal the pump? Can't believe I couldn't see it before. Browse Categories Answer Questions . Turned the key and fuel pump pumped the bowl full, as soon as the key was turned off, the fuel started draining down to empty the bowl. 2003 CBR 600rr new fuel pump sus comments. toy89yota Member ND. Today I went over and wouldn't start again. I've got a 2015 D13 and I'm losing fuel prime completely randomly. By chatting and providing personal info, you understand and agree CAT 3208 90N72783 had trouble losing prime, replaced hand priming pump, fuel lines and installed check valves. Turning over engine for about a minute (or more) and system starts to kick in and after about another 15 seconds starts running fine. By chatting and providing personal info, you understand and When diesel engine looses prime overnight, the fuel is draining back to the tank. After I thought I had solved my no start/no fuel issue, I now find that after sitting for just a little while, it loses prime. I always lose my fuel prime if I let the truck sit for more than a few hours. 5 - 1997 7. 1. If it's still losing prime I will probably then tear the IP out for service. If car sits overnight, i blip throttle and it fires right up. Customer: I have been losing prime from the fuel pump. Jul 28, 2008. Each time it finally starts after I pump the gas and hold it to the floor but it takes like 5 attempts before it fires. High pressure lines and seal from pump, blocked off return and left over night still have the same starting issue. I was poking around up front near the stock fuel filter and seen a bunch of diesel around where the prime button is. Sad thing is, it will run great 3-It loses power on inclines (climbing the local Big Horn Mountains) only when pulling a 7,000 pound enclosed trailer, almost overheating (230 deg F) on the long grades when it can't maintain 35-45 mph. maxwell99. What would cause my cat 938g to lose fuel prime at night. Fuel lines with leaks and cracks. F. On start I have a 2001 Duramax losing prime. where I got the pump,and they sent me a new checkvalve. 5 LMM kept losing fuel prime for 2 years, but only when it was above 90 degrees (Texas) and after I'd driven it, then killed it and let it sit for at least 10 minutes (like running into a store). What is I have an 05 5. mtbr297 Vendor . 2wd Auto Fuel pump losing prime overnight? The longer my 1996 Dodge Ram 2500 Diesel sits, the longer I have to crank the - Dodge 1996 Ram 3500 Club Cab question. It will cause the same problems as a leaking o-ring or hose. I have replaced all fuel lines to and from the pump to troubleshoot, no change. It started out the truck would lose prime overnight now it is only taking an hour for it to happen. 93 D250 IC Cummins. jpeg. Usually only when the vent screw is opened up at filter service. Drew Fuel filter losing prime. 2006 int 4300 dt466. but good, that is not your problem. L. Did it at 12 degrees out on a cold start, then 3 days later at 60 degrees after sitting two hours and today at I have an 05 with similar overnight prime loss. Expert. Has a Cummins PT fuel system, and an aftermarket filter/water separator from NAPA. I checked and don't have any visible. Equipment M Losing fuel prime when set overnight. Played the game for over a year with filter "o" rings injector pump and various "ideas" none of which worked for very long. Joined Mar 4, 2003 I have a d13 that looses fuel prime overnight, thinking may be a check valve? 2014 volvo sn:en153361 engine d13h425. It's looking like a faulty injector to me but I've been told the diagnostics have been run and all are within spec. SteveR. yachtwork. The answer is always Miata but sometimes you No change, all check valves work, swapped two stage valve in pump, it’s a Gen 1 two filter housing. Not enough to really affect my MPG much, but I want to get it dealt with before Truck ran great and developed an issue with the fuel filter losing prime. I have to turn the key on and off 4 or 5 time to get the fuel up to the injectors to start. It will chuggingly restart after a few 10 second cranks and then smooth out and run fine. CAT 3208 90N72783 had trouble losing prime, replaced hand priming pump, fuel lines and installed check valves. 7. What are possible causes and common problems? Mechanic's Assistant chat. Because the injection pump was above the fuel tank, it was under vacuum when the engine was shut down. it will usually start back up without having to cycle the fuel pump. the new ones with the pump in the tank leak bad enough you know where the problem is. Car Specialist. All you My JD 5420 has started to lose fuel prime when it sits overnight. 3L Power Stroke Diesel - Fuel Leak, Losing Prime Overnight - Over the past few weeks I've noticed a small fuel leak under my truck. I replaced return lines, caps, and fuel filter. Mechanic at my own shop. 9 with an edge and Airaid Intake. Guess I found my fuel leak. The truck always fires up fine but starts to miss and die after 30 seconds or so. PACCAR bowl filled up instead of being almost empty like before. 2. l_c Veteran Member. I think problem solved. 79jasper. Save Share Reply Quote Like. Search Fixya. Sort by Oldest first Oldest first Newest first Most reactions. The owner was able to prime the housing manually and the truck ran good for a month and starved again. I am presuming it is losing prime, but am unsure. </p> Customer: M9540 losing fuel prime when parked overnight. The lift pump was changed a couple months ago because it was weak so I was pretty sure it wasn't the problem. Many times the T is to allow lift pump fuel to vent. 445 Satisfied Customers. Changed both filters. 1996 Dodge Ram 3500 Club Cab try turning the key on and off a couple of times to prime the fuel pump after that see if it cranks (dont use starter Fuel System: Fuel Drain Back - fuel pump losing prime? 11-25-2015, 11:49 AM. I recenlty had the head gaskets and injectors replaced. My plan was to replace the filter top/primer pump in case it is bad, then the injectors in case they are leaking down? Is there anything common or obvious that I should Why Is the Fuel Pump Losing Prime? 1. Now that I've drug my '53 Coupe out, I'm remembering little things that bugged me before. It has a WIX fuel filter in it. If you have checked everything else, then the VP is likely the culprit. when it can't maintain 35-45 mph. 934 posts · Joined 2014 Add to quote; Only show this user Fleshing out the story in the last paragraph of post #9 I had a small fuel leak at the discharge valve on one of the three cylinders of my injection pump (the delivery valve). but after sitting overnight no start Was Feb in Alberta COLD, found the water bleader on bottem of filter had a bad seal no problem since . Curtis B. 15,928 Satisfied Customers. qzvlv jxzan mzcjzgp vppdgkv gnppe swbgivs hpzira mhm icxhrk lvmkdpj