What happens when a LB7 injector leaks at idle?
When an LB7 injector begins to leak, you’ll notice the truck hazing at idle and you’ll also be able to observe abnormally high injector balance rates (the amount of fuel each injector contributes to maintain a smooth idle) with the appropriate diagnostic equipment.
What are the problems with the Duramax LB7?
One thing the ’01-’04 LB7 Duramax is notorious for is injector failure. The two primary failure points of the factory injectors are internal cracking of the injector body itself and corrosion-induced failure of the internal ball seat.
How to tell if you have a fuel injector problem?
1 Engine misfires and decrease in power, acceleration, and fuel efficiency One of the most common symptoms of a potential problem with a fuel injector is engine performance issues. 2 Fuel odor Another common symptom of a potential issue with a fuel injector is a fuel smell. 3 Check Engine Light comes on
What causes the injector on a Duramax to leak?
Leaking Injectors—LB7 One thing the ’01-’04 LB7 Duramax is notorious for is injector failure. The two primary failure points of the factory injectors are internal cracking of the injector body itself and corrosion-induced failure of the internal ball seat.
Do you need a Duramax LB7 fuel injector?
In need of a replacement Duramax LB7 fuel injector? Or a performance set of injectors to match up with your aftermarket tune? Shop Sinister Diesel’s full collection of Duramax LB7 diesel injectors below:
How long does it take to replace an injector?
Based on the labor time it takes to replace the injectors, (book time is around 16 hours) many owners decide to replace the entire set of eight at once since labor costs would be duplicated if you had to come back later to replace the ones you skipped.
What kind of transmission does the LB7 have?
The Allison found behind the LB7 was a 5-speed model, and it will live a long life when used behind a stock powerplant. A few minor upgrades that will keep the trans happy revolve around keeping the fluid clean and cool, since ATF is the lifeblood of any automatic transmission.
Are there any issues with the 2001 to 2004 GM LB7?
Once you have the injectors crossed off the to-do list, there aren’t a ton of major issues that plague the 2001 to 2004 GM’s, but there are several smaller ones which you should be aware of if you own or plan to own an LB7, and the next most common issue lies with the transmission.