tdeal823
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Re: Low fuel pressure Duramax
How many miles are on your truck? Being a 2003 LB7 truck if the mileage is high and the truck has only had factory filters you could have injector or CP3 issues starting. Lift Pump with filtration..... Everyone hates to spend the money on one but they are a fuel system saver. You could add one now and get your injectors and or CP3 to last longer.706Views0likes0CommentsRe: Low fuel pressure Duramax
What is the mileage of your truck? If your getting up there in mileage your CP3 could be getting tired. This is common in Duramax trucks. GM Duramax trucks are the only diesels that do not use a lift pump. They use the Injection pump (CP3) to deliver injection pressure to the rail and also suck fuel from the tank through the filter and up to the pump sitting at the motor. That is a long way to suck fuel. If you have any minor air leak you will get a loss in vacuum and starve for fuel. With any fuel maintenance you have to be extra extra clean. I can not stress this enough. Here are the steps I would take. 1...The easiest thing to check is a new filter. If you are using factory style filters you need to clean and maybe replace all seals along with it. This includes the water sensor gasket and the bleeder screw. 2...Is you are reasonably mechanically inclined you can rebuild the filter housing. Autozone, KOI, NAPA will all have filter housing rebuild kits for less than $50. It is all the o-rings and seals for the housing. The housings are very susceptible to dirt and debris at the primer plunger. If you are worried about the work involved you can buy a new housing also. If you get a new housing make sure it is for your year truck. GM slightly changed the hose routing somewhere in 2005-08. 3...Get a NICKTANE filter housing adapter and a Donaldson filter. http://nicktane.com/osc/product_info.php?cPath=22&products_id=63 http://nicktane.com/osc/product_info.php?cPath=22&products_id=51 This will not always fix the problem. But if you have a week CP3 the larger filter will allow the pump to suck through the filter a little better. 4...The best solution is to install a Lift Pump back at the tank with a good water separator and filter built into one. These are expensive but once done are wonderful. AirDog 2 165 or FASS 150 are great options. http://atptrucks.com/airdogii165-2001-2010-gm-duramax.html Feel free to PM me with any questions. I will do my best you help. good luck Tony204Views0likes0CommentsRe: Gas or Diesel
DutchmenSport wrote: Regardless of size, .. if he's a diesel man now, he'll be disappointed if he goes back to gas. True statement. Once you have the torque of a diesel at your foot anything else will be like pulling with a KIA. The camper is at that point of diesel territory anyway unless it is all flat towing.233Views0likes0CommentsRe: Post your MPG in Diesels.
Just came back from a 486 mile round trip. From south/east of toledo Ohio to south haven Michigan and back. Truck trailer loaded to camp is 20-21.5k total weight. Averaged 11.2 MPG hand calculated running 68-78 MPH. Info on dmax and trailer are in sig. Just thought I would add my current experience. My trucks empty numbers are...... Normal mixed daily driving is 15-17 All highway at 68 or slower is 20-27 All highway at 70+ is 18-22292Views0likes0Comments
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