What should the idle knock sound be on a Duramax Diesel?
The sound is often more pronounced in the interior of the truck as it’s amplified by the transmission bell housing. Idle the engine at about 600 RPM with the transmission in Park or Neutral. The engine oil temperature should be 113–185°F (45–85°C). Turn the HVAC fan and radio off. Remove the accessory drive auxiliary belt.
Why does my Duramax throttle response take so long?
He said that the throttles are sensor controlled and when you push on the gas the sensor can interpret that you want to go faster/slower than you want and it takes it a split second to figure out the correct reading and that can cause the hesitation. He said there was no adjustment and said i had to change the way i drive or deal with it.
What happens when a Duramax engine goes down?
Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet. The failure is most common in higher horsepower engines, but can still occur in moderately modified and even stock power plants.
What causes idle surges on a car ECM?
Idle surging can be caused due to other issues in the car, but if it happens in conjunction with other throttle position sensor symptoms, the culprit is often the TPS. At idle, the ECM will not get the correct information and the throttle will variate randomly causing idle surges.
Why is my GMC Sierra not locking in overdrive?
It’s way less expensive than replacing a bad torque converter. Transmission Not Locking in Overdrive – The 4L60E and 4L80E both have torque converters that lock. That is to say when they are moving at a certain speed, they’ll lock and create a direct 1:1 connection between the engine and transmission.
Why is my 2004 GMC Sierra not moving?
It is pretty applicable to the 4L80E as well. Not Moving in any Gear – If your 2004 Sierra Transmission has a problem moving in any gear, it’s likely caused by a lack of transmission fluid. No matter how silly that sounds, and how convinced you are that it’s not the problem, go ahead and check it anyway.
What kind of engine does a Silverado 2500HD have?
April 15, 2020 Some 2020-2021 Silverado 2500HD/3500HD and Sierra 2500HD/3500HD trucks equipped with the 6.6L Duramax diesel engine (RPO L5P) may have a thumping or knocking sound coming from the rear of the engine. The sound is often more pronounced in the interior of the truck as it’s amplified by the transmission bell housing.
How does the DPF work on a Duramax truck?
Take your Duramax-equipped truck out for an extended straight drive, such as on the highway. The DPF will fill up with soot during typical operation, such as stop-and-go driving. The DPF system will store soot during this type of operation, but the engine will not get hot enough to engage regeneration mode.
When do you clean a Duramax diesel engine?
On the Duramax diesel engines, cleaning of the DPF happens automatically. Take your Duramax-equipped truck out for an extended straight drive, such as on the highway. The DPF will fill up with soot during typical operation, such as stop-and-go driving.
How long does it take for Duramax engine to regenerate?
The Duramax engine needs to see steady cruise speed, not stop-and-go traffic, in order to properly enter regeneration mode. You must travel above 30 mph for at least 20 minutes until the clean filter message goes off. Periodically engage in steady speed cruises to insure your DPF regenerates.
When to start a GMC Duramax diesel engine?
Remote start and a little time letting the Elevated Idle function do it’s thing before driving the truck goes a long way to warming the oil enough start the pressure drop process. I don’t like to work any engine until it has warmed enough for the oil to at least start to crop, and for the coolant temp to start to rise.
What is glowplug fault on GMC Duramax Diesel?
P133F is #8 glowplug hot resistance fault. Did you determine if the Elevated Idle is enabled? Are you using remote start? If not, are you giving waiting for glowplug light to go out before turning key to ‘start’? Elevated idle was not activated….it is now though.
Why does my GMC Duramax have high oil pressure?
High oil pressure at cold weather start up is normal for these engines. Remote start and a little time letting the Elevated Idle function do it’s thing before driving the truck goes a long way to warming the oil enough start the pressure drop process.
What’s the Check Engine light on a Duramax?
Started up fine. Only thing i noticed was that the oil pressure was pegged out at 120 and the battery was around 10 or 11 marker on the gauge. Ran and drove fine. Keep in mind the temp was around 18F this morning when i left for work. You will need a scanner to pull the codes.
Why does my car make a knocking noise when the oil is full?
Even with the oil full, if it is not being sent to the places in the engine that need it. Low oil pressure can be caused by a clogged line, a bad pump, or a clogged filter. The low oil pressure would rob the engine of the oil it needs and produce a knocking sound.
What to do if your Duramax oil pressure is low?
Duramax Oil Pressure The 2005 Duramax is notorious for bad wiring connection on the 2 large engine plugs on the driver side by the battery. Unplug them and clean them with electrical cleaner and plug unplug them a couple times. This is also the cure for low oil pressure problems.
How can I tell if my Duramax has a head gasket issue?
You can check for a head gasket issue by squeezing the top radiator hose when the engine is running and right after you shut it off. You should be able to squeeze the hose very easily. If it is rock hard, you have a head gasket issue.
The sound is often more pronounced in the interior of the truck as it’s amplified by the transmission bell housing. Idle the engine at about 600 RPM with the transmission in Park or Neutral. The engine oil temperature should be 113–185°F (45–85°C). Turn the HVAC fan and radio off. Remove the accessory drive auxiliary belt.
What should the oil pressure be on a Chevy Duramax?
Lb7 – 15w, 80lbs on start up at 20°. Then at temp about 30 according to the gauge. These are high volume low pressure pumps. Lb7 – 15w, 80lbs on start up at 20°. Then at temp about 30 according to the gauge. These are high volume low pressure pumps.
What to do about warm engine idle knock sound?
Loosely place the air box and intake duct back in place. (So a DTC is not set for the sensor when starting.) Start the engine and verify the sound is gone. Remove the loosely installed air box and intake duct. Separate the CAC tube. Install the belt. Install the CAC tube. Install the air box and duct.
What to do if your Duramax has bad wiring?
The 2005 Duramax is notorious for bad wiring connection on the 2 large engine plugs on the driver side by the battery. Unplug them and clean them with electrical cleaner and plug unplug them a couple times.
What kind of engine does a GM Duramax have?
It’s been said before, but that doesn’t make it any less true: The 6.6L Duramax is one heck of an engine. In stock form and even when substantially modified, GM’s legendary V8 diesel can provide hundreds of thousands of miles of trouble-free use.
What happens if the crankshaft on a Duramax goes bad?
Perhaps the most devastating of all Duramax failures is a broken factory crankshaft. Not only does this mean game-over for the engine, but it results in a truck that’s down for weeks (if not months) and a huge chunk of change missing from your wallet.
Which is the strongest crankcase for a Duramax engine?
This Duramax was being built to withstand more than 100 psi of boost, 1,000-rwhp, and was constructed around using the LML-based block (‘11+), which is said to be the strongest crankcase of all model year engines.