04 f250 6l diesel cranks but will not start when cold.
Truck not used very much, might sit 2 weeks at a time. When I attempted to start it just cranked away . I am told that the oil could be the trouble , because the injectors use oil to fire. I don`t use the truck much,so oil changes are only once a year.
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Re: 04 f250 6l diesel cranks but will not start when...
It seems that because it sit's for a while that perhaps it's losing it's prime. if ythis happens generally you will have to reprime the fuel system. in a diesel system you also have glow plugs to help ignite the fuel. check to make sure your glow plugs work, but i would start with whether you have proper prime in the fuel system.. please rate this
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the problem that you're having is caused by a code DTC you need to replace the crankshaft position sensor part number 10456607 I have a 94 GMC 1500 v6 this bulletin is on the Internet GM Technical Bulletin reference number 00 06 04 014 I hope this helps good luck
install pressure gauge and watch when key is turned off to see if pressure drops to zero if so bad drain back valve in fuel pump replace it or deal with it or could be cheap aftermarket pump and has hard time building unnecessary pressure to open poppet valves between before fuel injectors
Hi Mike: Glow plugs-on fed truck usually the controller-on cal.equipped truck usually glowplugs themselves.
We are assuming the you have some of this codes:
- P0380 Glow Plug/Heater Circuit A Malfunction
- P0381 Glow Plug/Heater Indicator Circuit Malfunction
I found this after searching this and other diesel sites for about a week glow plugs are covered on factory extended warranty-10 years or 200000 miles call GM @ 1-800-462-8782 have VIN# ready
Models: 2002 - 04 Chevrolet Silverado
2002 - 04 GMC Sierra
Equipped with 6.6L Diesel V8 (RPO LB7 - VIN 1) Engine; and California Emissions (YF5/NE1), or Clean Fuel Emissions (VCL)
Condition: Some customers of 2002 - 04 model year Chevrolet Silverado;
and GMC Sierra trucks, equipped with a 6.6L diesel V8 (LB7) engine, and
California emissions (YF5/NE1), or Clean Fuel Fleet emissions (VCL), may
experience a condition where the engine glow plugs may fail. Failure of
the glow plugs on these vehicles will cause illumination of the MIL.
Also, depending on the ambient cold start conditions and the number of
glow plugs failing open, some customers may also comment about hard
starting, misfiring and white smoking after cold start.
Customer Notification: General Motors will notify customers of this
special coverage on their vehicles (see copy of typical customer letter
included with this bulletin - actual divisional letter may vary
Ask your local dealer.
Hope this helps; also keep in mind that your
feedback is important and I will appreciate your time and consideration if
you leave some testimonial comment about this answer.
there are two batteries in all diesel's one batterie doesnot provide enough cranking power to start the truck they work together you still have 12v just as everyone else but it requires two to crank it over diesels are the hardest to start so they started doing this to help with that hope i answered your questions have a wonderful day
Diesel engines utilize a compression ratio about 2 and1/2 times higher that a gasoline engine. This means it takes much more power from the starter to crank it over. Two batteries are necessary to power the oversized starter required to turn a diesel engine over. Also, many diesel engines use glow plugs to warm up the combustion chamber to aid cold starting. The extra battery provides power reserve for this function also.
diesel engine have small starter helpers called glow plugs that heat the combustion air so that it can self ignite the diesel fuel
reasons for hard starting are
slow cranking speed---battery not charged enough or not big enough to do the job
injectors squirting and nit atomizing--- take the car to an accredited diesel pump/ injector repair shop for tip replacement and adjustment
the check engine light could be from faulty glow plugs
keep the fuel tank full ,especially in cold climate as there is hot return fuel from the injectors that causes condensation in the tank--water -- and that promotes the growth of a fungus which damages the pump and injectors
use diesel fuel condition on a regular basis to prevent that condition or keep the tank more that 3/4 full to stop condensation occuring
oil drop from the valve stem (from engine head to cyclinders)
diesel soot collect inside the exhaust system.
I will take a 5-10 minutes high rpm (not redline) ran on the highway.
Pay close attention to the rear view mirror and look for black diesel soot.
I will use Diesel Cleen or similar product to condition the fuel. (keep moisture down)
Use the recommended amount of SEAFOAM oil additive to condition the valve stem seal/rubber parts.
I can not rule out excessive blown by.
Can you get a diesel compression tester?
When was the last valve adjustment?
Please post the actual odometer on the engine and I will follow up on it.
The 01 DuraMax trucks do not have a block heater, unless they were special ordered with one. Just turn the key to the on position a few times before you try to crank it, and hold the accelerator partially down while doing it. However, don't hold the accelerator if it starts to crank, it DOES need a minute to warm up before being revved. Also, use a diesel treatment when its cold, it helps a lot.
some diesels are like that i have a diesel truck i have to plug it it on winter does yours have a plug to plug it in that keeps it worl on winters so when you start in the morningsyou are all warmed up diesels are slow lazy starters need to get warmed up first but they are excellent cars will last longer than gas engines