Why is my Duramax not starting after fuel filter change?

Changed the fuel filter today, and cannot for the life of me get the system primed back up. I loosened the bleeder screw, and have been pumping for so long that there’s a blister on my hand.

What to do if your Duramax won’t start?

There are hundreds of thousands of duramax’s on the road that don’t have lift pumps. Pressurize the fuel tank with a little bit of air watch for fuel leaks and then try and start it. Click to expand…

What to do if you lose prime in fuel system?

Dump the factory filter and replace with Nick’s underhood Cat setup. When you order the Cat filter and adapter also order a filter head rebuild kit which replaces the o-rings. Did you find the recommended reading relevant to this discussion?

Do you need a lift pump for a Duramax?

They suck, you can have someone crank the engine while you hover over the bleeder screw. Or pour diesel into the filter directly. But even doing that you’ll still need to prime it good. Lift pump my friend…a lift pump will be your friend someday.

Changed the fuel filter today, and cannot for the life of me get the system primed back up. I loosened the bleeder screw, and have been pumping for so long that there’s a blister on my hand.

How to stop a Duramax truck from losing Prime?

Tried running fuel line from injection pump to tank of diesel.. No go Pressurized the fuel tank primed it and tried starting.. Nothing Pressurized fuel tank sprayed soap water on lines.. No leaks found Tried having someone prime while I cranked. Truck will run off starting fluid through airbox but dies when you stop spraying.

Can a Duramax diesel engine be kept warm?

Huge no-no for modern diesel engines as your grid heater in the intake and glowplugs stay on until the truck is “warm”. Also sometimes rebuilding the filter head isn’t enough, you have to replace it. Click to expand… Yeah I wasn’t to fond of spraying it.

How does the fuel pump work on a Duramax?

Finally, once the pressurized fuel enters the injector, it either gets sprayed directly into the cylinder to make a big boom, or if there is extra, it flows back to the tank through the injector return to start its journey all over again.

What happens when you Prime a Duramax Diesel?

It starts and runs really good for a few weeks or so after each fuel filter change then wont even start at all til i prime it and bleed it. Hope the new injectors fix this problem!

Why does my GMC Duramax not start up?

Sat in drive way moved it around a couple of times and parked it in the garage to do tcase. Almost two months later I finally finished it and now it won’t start. Acts like it will, fires up then dies right aways like the fuel shut off.

Why is my priming bulb not working on my Duramax?

There could be a hairline crack in that causing your problem too and not dripping on the ground. Can you just bypass the stock filter, by installing a after-market filter system. The only thing about most of the after-market filters is that theire isn’t a priming bulb.

What are the signs of a bad fuel filter?

Some of the most common signs of a bad fuel filter include: If you were driving your vehicle uphill and noticed that it’s losing power, it could be a sign of a bad filter. When the vehicle is under stress, like going up a Hill or has a lot of hauling, it will need much more fuel to produce more power that could resist and work against gravity.

How much power does a Duramax Diesel have?

Power was at an all-time high coming in at 397hp and 765 pounds of torque, and in order to provide this much power while still keeping pollutants low, GM needed to be able to increase the pressure in the fuel system to levels above what the tried-and-true CP3 could safely deliver.

What causes a Duramax injection pump to fail?

As a result (allegedly), the lack of lubrication in the fuel can cause a premature failure of the injection pump, to a point where it won’t allow the LML Duramax to run. You can be driving down the road and everything seems normal, and when the pump fails, the truck just shuts off.

Where is the CP3 injection pump in a Duramax?

The CP3 injection pump sits in the valley of the engine between the cylinder heads and is driven by the camshaft gear, and it has two main jobs: get fuel from the tank up to the engine, and pressurize the fuel to 26,000psi and ultimately inject it into the engine.

What to do if your diesel fuel line is bleeding air?

Here are the steps to take in bleeding air from a diesel fuel system: 1. Turn off fuel valve. 2. Clean outside of filter housing. 3. Install new filter element and new gaskets. A little oil on the gasket will aid a tight seal. 4. I’d suggest that you fill a spin-on filter with clean fuel before installation. 5.

How do you fix a bleed plug in a fuel pump?

Most all equipment has a hand priming pump lever to pump fuel through the system and replace trapped air. (Check operator’s manual.) Pump several times until full flow, without air bubbles, escapes from the bleed plug holes. 8. You may need to bleed filters, fuel pump and lines to the injectors.

When to close bleed plugs on diesel engine?

Close bleed plugs after all air is removed from the fuel tank, filters, settlement bulb, and fuel pump (only one at a time working through all bleed screws beginning closest to tank and ending at nozzles if necessary). 10. Try the engine; if it doesn’t start or runs poorly, you may have to bleed the injection

How can I Keep my Duramax Diesel pump healthy?

However, there are measures you can take to keep the pump happy and healthy, the first being to always buy your diesel from a high-traffic, reputable filling station that’s known to dispense good, clean fuel. Second, always change the fuel filter at or before the recommended service interval.

What kind of pump does a Duramax cp4.2 use?

Like all Duramax engines from ’01-’10, the LML was also void of a lift pump from the factory. This means that not only does the CP4.2 have to pressurize fuel as high as 29,000 psi before sending it to the rails, but it also has to pull its low pressure fuel from the tank.

Does the fuel filter need replacing?

Simply noticing a sudden drop in fuel efficiency is enough for the car owner to suspect that the fuel filter needs to be replaced. A rule of thumb for maintenance is that fuel filters should be replaced approximately every 24,000 miles or once every two years.

How often does fuel filter changed?

You must change your vehicle’s fuel filter at 50,000 miles. Subsequent filters should also be changed at least every 50,000 miles, but changing them annually is even better.

How do I replace diesel fuel filter?

How to Change a Diesel Fuel Filter Step 1 – Locate the Filter Step 2 – Detach the Old Filter Step 3 – Install the New Filter Step 4 – Clean Up Step 5 – Refill Fuel Lines with Fuel Step 6 – Dispose of Old Filter

How often should you change fuel filter for diesel?

For most Diesel trucks it is recommended that you replace your fuel filter every 10,000-25,000 miles depending on how you drive, how often you commute and what type of vehicle it is. Most cars will have information on how frequent you should change the fuel filter in the owner’s/maintenance manual.

Why does my 2004 Duramax truck not start?

CLICK HERE TO RESET YOUR PASSWORD! 2004 Duramax WONT START! I have a 2004 duramax that i reciently changed the fuel line that goes from my fuel sending unit to my steel feed line.. I also replaced my fuel filter housing because the truck was loosing prime..

Are there any problems with the Duramax fuel pump?

It can also be relatively difficult to prime the fuel system once air has been introduced into the system, such as when the fuel filter is changed. The 2001 to 2004 LB7 fuel filter housings seem to be the most prone to problems. Water pump failures for Duramax engine are somewhat common.

What causes fuel starvation in a Duramax Diesel?

Fuel Starvation and/or Air in the Fuel Lines. The Duramax diesel is susceptible to fuel starvation and getting air in the fuel lines. This can be contributed to the fuel filter housing design and the fact that the Duramax does not use a lift pump. Rather, the high pressure fuel pump (injection pump) is responsible for vacuuming fuel from the tank.

Is there a 6.6 Duramax that wont start?

Chevrolet: 6.6 duramax wont start all of a sudden . Turns… I have a 2009 chevy 2500HD with the 6.6 Duramax. I started I have a 2009 chevy 2500HD with the 6.6 Duramax. I started the truck with my remote while I was opening my shed it ran for a couple of seconds … read more

What to do if your diesel engine won’t start?

Diesel no start after fuel filter change. – YouTube Your body type? If playback doesn’t begin shortly, try restarting your device. Videos you watch may be added to the TV’s watch history and influence TV recommendations. To avoid this, cancel and sign in to YouTube on your computer.

What makes a diesel engine start after a diagnostic?

If the engine has the proper compression, the proper cranking speed and the proper amount of fuel injected at the proper time, the engine will start. Before a technician can start on any diagnostic problem, he or she needs to be aware of how the system works.

Can a Duramax 6.6 start without a fuel pump?

My son has a 2011 duramax 6.6 that will not start on fuel but will start with a shot of either and runs like a top. He has replaced the fuel pump, … read more Vocational, Technical or Tra… Vocational, Technical or Tra… Vocational, Technical or Tra… I was low on fuel and drove to station to get more but never ran out.

What causes a fuel filter to leak on a Duramax?

Fuel Filter Housing Oring Leaks – The Duramax fuel system does not have any sort of low pressure fuel pump pushing fuel to the engine from the tank. The injection pump sucks all the fuel from the tank.

How do you fix a frozen diesel fuel filter?

Remove the frozen diesel fuel filter and pour Sno-Cat™ directly on the filter element. Do the same to the filter housing as well. You will now start to hear the filter lines crack as the product starts to thaw these components. 3. Replace the filter element and housing and prime the diesel fuel system as recommended by the manufacturer.

Where to come when your 6.5L diesel will not start?

Where to come when your 6.5L Diesel will not start! “The PMD / FSD (Pump mounted driver) is by far the #1 cause of 6.5L no-starts (at least 90%). If your truck experienced random stalling like someone shut the key off before ultimately refusing to start again, the PMD is very likely the issue.

Can a 6.6L Duramax Diesel stop running?

My GMC 2500 6.6L Duramax Diesel stopped running and will not start. Turns over but sounds like it gets no fuel. Has My GMC 2500 6.6L Duramax Diesel stopped running and will not… My GMC 2500 6.6L Duramax… My GMC 2500 6.6L Duramax Diesel stopped running and will not start. Turns over but sounds like it gets no fuel.

What causes a GMC 2500 diesel to stop running?

My GMC 2500 6.6L Duramax Diesel stopped running and will not start. Turns over but sounds like it gets no fuel. Has happened in past and dealer fixed short in wire. That time it would blow fuse but not this time. Submitted: 10 years ago. Category: GM Experience: GM Grand Master Technician 2007. 14 years experience. Hello, I’m Cam.

Why is my Duramax fuel rail pressure so low?

This is a very common problem that we hear about from our Duramax customers. Actual fuel rail pressure is not keeping up with desired fuel rail pressure. This may only happen in high fuel demand situations like towing or racing but it can also happen with everyday use.

How much does it cost to rebuild a Duramax fuel rail?

Airdogliftpumps.com sells an inexpensive rebuild kit complete with filter and instructions to repair this important part.The water separator screws into the bottom of the filter itself and must be replaced if cracked or damaged. Common hand tools are all that is needed. Approximate time is 1 hour. Parts Cost: $19.99

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