Why does my 2004 Duramax surge at idle?
Why does my 2004 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.
What causes a Duramax to idle rough?
Rough idle can be caused by bad engine mount– exhaust contacting the frame, bad injector, or weak cylinder compression.
Does it hurt a Duramax to idle?
It won’t hurt a thing.
How long should I let my LB7 warm up?
2-3 minutes is plenty unless it’s extremely cold and you didn’t plug in the block heater. You need just enough to get oil circulated and let the pistons warm up a little, no more than 10 minutes on a very cold day (-10 and colder).
Why does my 6.6 Duramax surge at idle?
more than like that is a bad FPR (fuel pressure regulator). 99% of the time surging is caused by that. Very common on the LLY motors.
What do I need to know about LB7 Duramax?
LB7 Hard Facts
| Production | ’01-’04 | Cast aluminum, six 14mm diameter head bolts per cylinder (with sharing) |
|---|---|---|
| Displacement | 6.6L (403ci) | Bosch CP3 |
| Compression Ratio | 17.5:1 | IHI RHG6 fixed geometry (with wastegate) |
| Block | Deep-skirt, cast iron (gray iron alloy) | Air-to-air |
| Rods | Forged steel, fractured | 300hp at 3100 rpm |
What causes a diesel engine to surge at idle?
If an engine is not getting enough fuel (this is called “running lean”), due to fuel pressure (regulated by the fuel pump and regulator), restricted fuel injectors, a vacuum leak or really anything that throws off the fuel mixture going in to the engine, this can cause the surge.
What causes Duramax to surge?
How long can I leave my Duramax idling?
Any LB7 truck can be ran at idle with no problem. GM says the lly and up trucks with an egr cooler and valve can only be idled for 10 minutes MAX is what gm technical assistance tells us.
Is it bad to drive a diesel cold?
The best solution to cold weather diesel starting problems is to avoid them by being prepared for cold weather before it happens. Diesel engines are harder to start in cold weather because they depend on high temperatures created by compression to ignite the injected fuel.
Should diesels be driven hard?
A hard driven diesel burns the soot that both hard & soft driving generate but which only hard driving will burn up leaving it to cause damage in a gently driven car. 3. It is about turbo boost. An small engine with lots of boost produces more soot than a bigger less boosted engine producing the same power.
Will a little gas hurt a diesel engine?
As little as 1% gasoline contamination will lower the diesel flash point by 18 degrees C. This means the diesel fuel will prematurely ignite in the diesel engine, which can lead to engine damage.
Can I leave my diesel running all night?
Manufacturers recommend running the engine for five minutes to cool it down before shutting it off, but many drivers won’t wait. They simply leave the engine idling while they eat, shower, or shop at a truck stop. ”There is no need to leave an engine idling except in cold weather,” Mr. Allen says.
Should you let a diesel warm up?
Allow Time to Warm Up the Engine In order to start a diesel engine and keep it running in cold weather, you must make sure you allow plenty of time for your engine to warm up. If you do not let your engine warm up before driving, you will make it work harder than necessary, which will lead to problems later on.
