Why did my Chevy Duramax lose power under load?

Follow diagnostic chart, test system pressure, relief valve failed” so they replaced the FPRV. More limps and a year later there was a P0101 code indicating the Mass Air Flow (MAF) sensor failed so I had it replaced. The air filter was changed then too.

Why does my Duramax diesel engine keep overheating?

I and 3 friends with duramax diesels are having same issues. The top radiator hose is collapsing ,preventing flow of coolant to engine. Replacing hose seems to fix problem for a while but need to figure out why the hose is collapsing when engine is under heavy load ,pulling trailer up long grades.

Can a GMC Duramax run with no trailer?

Dropped the boat, let it sit a while then it ran great with no trailer. Took it back and they replaced “some fittings”. So 2 months later, I don’t fish near enough, I drove it 8 hrs to the coast and hooked up to a boat. It ran about 5 miles. Same thing , light comes on loss of power but can feather it up to 40-50 but cant push it.

What’s the RPM on a 2005 GMC Duramax?

Check out the thread “2005 6.6 max rpm 2000”, there are some suggestions there. Also search for the “ice pick trick” as it is one of the suggestions that often comes up for this problem.

When did GMC Duramax lose power under load?

In 2012 there was a P1093 code and the dealer invoice states “…low rail pressure during enrichment. Command high fuel rail pressure, pressure drops. Follow diagnostic chart, test system pressure, relief valve failed” so they replaced the FPRV.

What is the towing capacity of a LMM Duramax?

If you have a rear wheel drive truck your tow capacity will be slightly higher. Dually models will also have much better overall towing capacity. Maximum conventional tow capacity for the 6.6L LMM Duramax is 13,000 lbs. When equipped with a properly equipped dually, the LMM is capable of towing 16,700 lbs with a fifth-wheel hitch.

Is the LMM Duramax a reliable diesel truck?

The DPF system and the regeneration process it undergoes is one of the LMM Duramax truck’s biggest problems. Despite the DPF system, the LMM Duramax is still a reliable and capable diesel. You can find everything you need to know about this truck in our LMM Duramax specifications chart below.

What is supply side restriction on Duramax LBZ?

Supply side restriction runs normally in the 2-4” hg range on this gauge. If it is any higher than 4”hg start with a fresh filter. If the restriction does not improve then you will need to trace lines back to tank from the filter housing and possibly open the tank to inspect the pickup assembly.

Are there any problems with the Duramax LB7 diesel?

Since the LB7 is a bit behind the performance curve compared to more modern diesel engines, performance modifications are common. Once you reach the 550rwhp mark, the LB7 is very prone to bending rods and also snapping crankshafts. Additionally, more power requires more fueling and more cooling.

Are there any problems with the Duramax LMM?

One problem can rear its head when you are pushing the power of the LMM to a level GM never imagined, and that’s with the pistons. Simply put, they can crack under pressure. There are a lot of factors which dictate the power level where a piston bites the dust, but it’s usually north of 600 horsepower.

When did the first Duramax V8 engine come out?

Duramax Engine LB7 2001 to 2004 The first Duramax V8 was introduced in 2001 and was given the code name LB7. The introduction of common rail injection powered by the Bosch CP3 injection pump made the LB7 Duramax stand apart from other diesels of the day with excellent power and efficiency.

When does a Duramax chev.p.u.lose power?

Duramax Chev. P.U. (2003) loses fuel prime and motor stops running at low RPM or at an idle. No visible leak around filter area. Fuel pressure … read more Vocational, Technical or Tra… Hi, I just purchased a 2004 Kodiak C4500 crewcab with the Duramax diesel engine mated to an Allison with 4:44 gear ratio. What rpm do you … read more

What makes a Duramax LB7 diesel so special?

The introduction of common rail injection powered by the Bosch CP3 injection pump made the LB7 Duramax stand apart from other diesels of the day with excellent power and efficiency.

What causes a Chevy 2500HD to lose power under load?

Probably P0087. Check the fuel hoses at the side of the trans– they can get kinked, weak and collapse. I’ve just experienced a very similar situation with my 2005 2500HD. After driving about 2 hours, over varying terrain, I had to stop at a light (not the first on the trip).

Why is my diesel losing power under load?

I don’t know stuff about diesels, but your truck is a couple years old. It is always a possibility. Get back with us when you get the codes, they will help narrow down the problem. You’re probably losing fuel pressure. It might be a bad fuel pump .

Where did the smoke come from in my Chevy Duramax?

As I tried to keep the truck moving enough to pull off to the side of the road, blue/white smoke came pouring out of the right front fender well so we stopped and bailed out. The smoke stopped immediately and 30 minutes later I was able to drive the truck again.

Check out the thread “2005 6.6 max rpm 2000”, there are some suggestions there. Also search for the “ice pick trick” as it is one of the suggestions that often comes up for this problem.

When is the GMC Duramax going to the dealer?

It’s going to the dealer’s on Wednesday, but I’d like to know if anyone has any further suggestions on what may be going on here.

What to do if your Chevy Silverado loses power?

While generally the Chevy Silverado is a premium, reliable truck, there are times when even the best vehicles can end up having problems. If you’ve ever had your Chevy Silverado or GMC Sierra suddenly lose power, you may be wondering exactly what is going on with your truck.

What does it mean when your check engine light stays off?

Once you fix the problem then you can use your scanner again to erase or reset the check engine light. If the problem has been fixed the Check engine light will stay off. If it comes back again that mean the problem has not been fixed or there is another problem.

How to turn off service engine soon light?

The simplest and the safest way to turn off check engine light soon is by using an OBD2 scanner which can be obtained from any auto shop. The scanner will retrieve the error code and clear it completely. 1. Connect the Scanner

How often should I Change my Check Engine light?

Spark plugs should be replaced approximately every 25,000 miles to prevent their eventual failure. A diagnostic test can determine if the spark plugs are the reason the Check Engine warning light has come on. Our Cardinale GMC Service technicians can replace your spark plugs and reset your vehicle’s computer.

Why does my check engine light not light up?

If your Check engine light is ON, the easiest way to diagnose this problem is to always check your trouble code memory with an OBD2 scanner. The check engine light will not light up if there is a scheduled service as the service engine soon light.

When does the service engine soon light come on?

What to do if your engine maintenance light goes out?

Check your engine control unit for any stored trouble codes. If you receive any codes, save them and try to get information about what they mean. If there are codes for emission problems that are not dangerous for your engine, you can try deleting the code to see if the engine maintenance light goes out.

Why does my Duramax not run over 30 mph?

Took it to dealership because of a surge at idle, and at 55 to 60 mph. Dealership replaced fuel pressure regulator. $900.00 dollars later and a half mile down … read more I have a 2003 Chevy 4500. New injectors, new fuel filter. Will not run over 30 mph. Could it be a lift pump?

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.

Are there any major problems with the L5P duramax?

Mechanically, the L5P Duramax is stout and very few major problems have been reported. One common problem is with the MAP sensor however, as it tends to clog with soot and throw a check engine light, but a simple MAP sensor spacer and a can of electrical cleaner can get you back on the road worry free and prevent the soot from building up again.

Why is my Check Engine light not working?

If the seller was worried that the car wouldn’t pass an emissions test, thus causing you to not want to buy it from them, they may have disable the ECM and prevented the vehicle from storing Check Engine Light Codes. Situations like this are rare – but it has happened.

Why is my Duramax diesel engine not working?

The trucks computer keeps track of how much fuel needs to be added or subtracted from each individual cylinder to make the engine run smoothly, and this value is called the balance rate. If one cylinder is contributing too much or not as much as the rest, the cause is usually a bad injector and the cure is a replacement.

Are there any problems with the LLY Duramax?

In terms of LLY injector problems, GM had sorted out the internal failures with the 2004 ½ redesign, but the LLY Duramax would occasionally exhibit a trouble code for the injectors, but in most cases it turned out to be an issue with the injector harness rubbing through and causing a short or open in the wiring.

Why did my Chevy Duramax lose power under load?