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Fuel pump is running, changed fuel filter, replaced mega fuse: temperature is very cold (varible)fuel lines froze-6 wind chill. still won't start! Any Ideas?
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If you have a way to check the fuel pressure, that's a good starting point. I'm not sure if a 2006 Trailblazer has a fuel filter or not, but if it does, you should consider replacing that to make sure that's not the cause of the symptoms. Often the symptoms of a failing fuel pump are long starter cranking times before the engine starts, or the engine won't start at all. Additionally, a cold engine may start just fine, but after driving for a bit, shutting off the engine, then starting it again within a few minutes, the engine will fail to start. The duration of the short rest would be something like running in to do some grocery shopping, etc.
well, the only cause is no fuel. it could be a blown fuse and or relay to fuel pump. or a restricted fuel filter. or a bad fuel pump. heres how to hear if pump is running. place hand on bottom of fuel tank, have a person turn key to on. you may have to do this a few times,if working, you will feel a vibration in tank. for a fuel pump only runs for a few seconds to pressurize the line to engine. but it runs all the time the car is running. check for a bad fuse or relay first ! good-day !
THE FUSE LINK TO ALTERNATOR. YOU HAVE TO DISCONNECT NEGATIVE BATTERY CABLE BUT FIRST TURN OFF RADIO BEFORE DISCONNECTING NEGATIVE BATTERY CABLE.TELL ME WHAT SIZE MEGA FUSE YOU REPLACING 40 AMP FUSE IN FUSE BOX..FORD CARRIES MEGA FUSE 175 AMP FUSE A MEGE FUSE DOES SAME JOB FUSE LINK.YOU NEED TO REPLACE FUSE LINK.FUSE LINK IS HEAVY GAUGE WIRES TWISTED TOGETHER THEN USE ROSIN CORE SOLDER AND SOLDER WIRES TOGETHER.WRAP A LOT OF ELECTRIC TAPE AROUND SOLDER WIRES TO KEEP FROM GROUNDING STARTING A ELECTRICAL FIRE. FUSE LINK LOCATED IN THE WIRE FROM THE BATTERY TO THE ALTERNATOR YOU WILL SEE WORDS FUSE LINK ON THE LINK.
Rad Ride, It is common that the dodge in fuel tank screen on the fuel pump, clogs with small particles from bad or contaminated diesel fuel, I have a 06 Mega same thing, if you are stock no mods I would turn the key to run but do not start it , listen for the pump running in the tank. You can look through the driver side rear wheel well and see the upper corner of the tank. I put a broom handle on it and one end to my ear makes for easy check. If no sound check the fuse, but changes the screen if you hear the pump running. If so, run as much fuel out of the truck with out running it dry and then you have to drop the tank and remove the fuel sending unit and pump with screen. You may get lucky and just clean the screen and if not the pump as a kit. I have a few mods so I went with the Airdog system which takes the pump out of the tank and adds better filters and air reductions. Hope for the best, Good Luck,
start by checking the fuel pump fuse and relay. will the fuel pump run for a few seconds when you turn the key to the run position? If so you may need to replace the crank position sensor. When this goes bad the engine will turn over and start, but only run for a second or two then die like its out of gas.
If you do not hear the fuel pump coming on and the fuse and relay check out good then you will have to see if there is power going to the fuel pump. if power is present at the fuel pump plug then the fuel pump is bad
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