How long does it take to change a fuel pressure regulator on a LLY Duramax?
How long does it take to change a fuel pressure regulator on a LLY Duramax?
The first time it probably will take 8 hours. If you have done it a few times, you can do it a lot faster. There is no way you can do it in two hours.
How do I know if my fuel pressure regulator is bad on my Duramax?
The symptoms of a bad regulator usually manifest as a surge when idling, though sometimes the surge can happen at speed while driving. Other symptoms include power loss on acceleration or hard starting. Sometimes it can get bad enough to force the truck into limp mode with a low rail pressure warning.
What causes a Duramax to go into limp mode?
It fails to maintain enough rail pressure when the vehicle is pulling a load up a hill, and your Duramax may go into a limp mode. If the actual rail pressure is between 2176 psi or 2900 psi (depending on model year) below desired pressure, this would cause a P0087 or P0093 or P1093 code to set.
How much fuel pressure should a LLY Duramax have?
Use common sense safety practices when servicing any diesel system: While maximum control oil pressure on a Power Stroke can reach nearly 4,000 psi, the Duramax fuel system is pressure-relieved at a blistering 27,550 psi.
Why does my Duramax surge at idle?
The most common culprit is a tiny air leak in the fuel system somewhere. Inspect the flexable fuel lines from the tank to the fuel pump, if there is even the tinest air leak, surging, hard starting, and infrequently small drops of fuel on the driveway happen.
How do you know if you have a bad fuel pressure regulator?
A faulty fuel pressure regulator may result in engine misfires, reduction in power, poor acceleration, and a decrease in fuel efficiency. That said, the symptoms can also take place owing to other mechanical issues.
How do you reset limp mode?
If you know that the transmission issue was temporary, then you can reset the limp home mode by following these steps.
- Bring your car to a complete stop.
- Shift your automatic transmission into PARK.
- Turn the ignition switch to OFF.
- Wait 10 seconds.
- Turn your vehicle back on.
- Select the gear of your choice.
What should Duramax fuel pressure be at idle?
5,000 psi
For starting a Duramax, you’ll need a minimum of 1,500 psi fuel pressure at the rail while cranking and at idle a minimum of 5,000 psi.
Where is the diesel fuel pressure regulator located?
Fuel Pressure Regulator Location The fuel regulator is most commonly close to the intake manifold in most cars located on the fuel pressure rail.
What would cause a diesel to surge?
What Causes Diesel Engine To Rev Up And Down? Your erratic engine is most likely caused by a vacuum leak, sensor failure, or an issue with your exhaust gas re experiencing could be a vacuum leak, sensor failure, or an EGR system malfunction.
What happens when a fuel pressure regulator goes bad?
A faulty fuel pressure regulator can cause a loss of fuel pressure. As a result, the engine may exhibit performance problems, such as hard-starting, rough running, stalling, and a lack of power.
How long does it take to replace a fuel pressure regulator?
A professional mechanic would require roughly 5 hours. (If just the regulator is replaced that takes about 1 hour).
How do I get my Silverado out of limp mode?
This is done by disconnecting the battery and letting the vehicle sit for 30 minutes. Then after this time has elapsed you will reconnect your battery and retest the system.
How much does it cost to replace a CP3 pump on a Duramax?
2-to-CP3 conversion is about $3,500 for parts and labor. That might take the breath away from many Duramax owners, but compared to the $8,000-plus it costs should the CP4. 2 fail, it’s a bargain.
