When the truck has sat for a while (overnight), I start the truck and the RPMs will fluctuate a second and then the engine will turn off. I will have to turn the engine over for about 10 to 20 seconds, sometimes longer and the engine will finally turn over, all the while blowing smoke out the pipe. The truck runs fine when started. It seems like the discrepancy will gradually get worse the longer it will sit before being started (a couple hours after sitting and attempt to start the truck, the RPMs will fluctuate but the engine will still continue to run. leave the truck sit overnight and then start the engine is when this issue is the most annoying. I suspect it might be a pressure regulator, but I cannot find it. Is it internal to the injector pump?
Is it diesel and what color is the smoke (white or black)?
SOURCE: 1999 suburban starting problem
It is possibly a PASSLOCK problem. Before you start the vehicle, place ignition in RUN and observe the "SECURITY" light. Under normal conditions, it should go out after about 5 seconds. Once the PASSLOCK is activated, the vehicle wil not start for 10 minutes. If you have access to a OBD-II code reader, you will see a code stating a problem with the security feature, code P1626. The problem is most likely a intermittant failure of the contact in the ingnition switch responsible for this signal.
SOURCE: 1985 diesel after sitting overnight will not start
The check valve is a small brass fitting where the return line attaches to the filter head. I believe it takes a 7/16" wrench. There is a 'duck bill' inside that prevents fuel from leaking back to the tank causing air in the system. It should allow flow in only on direction. Some times you can see light through it if it's bad enough. Also, the lines between the injectors can dry out and start to leak air. Air will leak in before fuel leaks out, and you won't see it. There are plastic, cup-shaped connectors for these hoses that press onto the top of each injector. They are sealed by two o-rings on each injector body where it meets the connector. These o-rings can dry out and also leak air and fuel. Your Ford dealer or diesel service professional should have the proper o-rings. Any other o-rings might not seal, as they won't be the exact size. You already changed the fuel solenoid when you replaced the pump. It is inside. There has to be battery cranking voltage to it while cranking, and battery voltage with key in 'on' position. The wire attaches to the top of the pump. This is not likely to be the problem, since it restarts every 2 hours.
SOURCE: hard starting after sitting awhile
I posted the second problem, I did get my car fixed. the problem was a weak fuel pump
SOURCE: turns over but won't start
I'm guessing this vehicle is a diesel. From your description, it sounds like you may have a fuel system problem, bad fuel injector, bad fuel pressure regulator, or possibly even a problem with the fuel injection pump. The white smoke you spoke of is unburned fuel and you are right the system is flooded and takes a little bit of running to clear out. I would highly reccommend taking your truck to a repair shop. The longer you delay, the more likely that you'll cause additional damage to other systems, for example the starting system and charging system as well as shortening the life of your batteries.
SOURCE: 2004 mustang fuel pump issue, start car runs for a
sounds like the fuel pump is getting tired
this is an idle valve after 1996 the ecu control the idleing from the engine with this air by pass if this valve is geting bad it can get stuck open or closed or dont working right is an electric selenoid ......... listen for air leaks ....... wen you push the clutch you push the brake too check the brake booster
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