Truck wont start again

[COlmsted]

My 2003 is now dead in the driveway. I posted about a hard start condition about 2 months ago and everyones feed back was the injectors going bad and that they were a common problem. I priced injectors and I can't believe how expensive they are. I figured I would take the slow approach and change the lift pump to a BD pump installed down on the frame. Well that seemed to fix it because the truck ran and started normal. I went to start it the other day and all it does is crank. I shot some WD-40 down the intake hose and it still would not start. This trick worked when I had this problem 2 months ago but now it doesnt. I put a code scanner on it and it came up with P0366 crankshaft sensor. I put a new sensor in today and it still would not start. Do you think the injectors are the problem. The truck has 106K miles on it with no past problems. I just dont understand how the truck could run so good and then all of a sudden the injectors quit working. The air temp was 33 degrees and the grid heaters are working. Any suggestions will be greatly appreciated. Thanks, Charlie.

 

[jelag]

we tried with an early 04 to add a boost pump... . when the lift pump failed it still would not run with the added boost pump... .

We changed the lift pump to the in tank unit and have not had a problem... . until we removed the old lift pump and replaced it with the fuel line kit the truck failed to start...

We discovered the problem by removing the fuel filter and looked for fuel when we turned the key on and off... .

BTW - with the in tank lift pump... the aux pump on the frame rail works... ... so something in the failed stock lift pump kept fuel from flowing.....

hope this helps...

 

[rbattelle]

I think you should open the filter canister and be sure you're getting fuel before going any further.

Could be a fuel gelling/freezing issue.

Ryan

 

[betterthanstock]

This is unlikely on a 3rd gen truck, but one of my relatives older mercedes diesel was getting next to impossible to start. The valve lash was down to zero, it sounded like it was starting on 2 cylinders. Just one more thing to eliminate from your list.



If you got a crankshaft sensor code, it may be a bad ground, or other connector, to the ECM.

 

[COlmsted]

I will check all the grounds and connections to the ECM. The original lift pump was on the fuel filter so the kit I installed had a plate to cover the hole where the pump went and the new pump on the frame is the only pump in the system. I will take the top off the filter and see if fuel is pumping up from the tank. I will keep you posted. Thanks, charlie.

 

[COlmsted]

Well heres the latest. I kept trying things thinking the problem is fuel related and the batteries started going dead. I charged the batteries and tried to start it but it still would not start. It was about 30 degrees out so I figuered I would plug in the block heater for a couple of hours. I went back out later on and the truck started right up. I ran it around all day and it was fine. Next morning I tried to start it and it would not start, plugged it in again, waited a couple of hours and it started right up. I checked the power to the grid heaters and I have power to them. I put my hand on the air horn and it doesnt feel very warm while the wait to start light is on. How hot should it feel and has anyone ever had to replace there grids? The start problem has to be temp related, could there be another sensor not telling the computer the engine is cold? Thanks, Charlie.