2001 7.3 wont start while cranking

[superduty1987]

I cant get my 7.3 to start it cranks over r.p.ms are all guages work wait start works...etc but while cranking it makes a buzzing noise under the dash by my feet? what could be the issue. i had to charge my batteries casue they got run dead and found out one of them was bad and wouldnt take a charge. I bought a fuel filter and was going to replace it, opened water fuel separator and drained it its been a year exactly for the filter change and temps been around 45 50 degrees in the mournings i dont get it. please any suggestions? why there is a buzzing noise in the past its happened to me i would just turn key on and off couple of times and then it would start, this time it left me sitting in the drive please help

[SuperCrutyPS]

The PCM (Power Control Module) is under the dash next to the parking brake. Left to right - Kick panel, parking brake assembly, PCM (Box roughly 6" square, 1-1 1/2" inches thick, standing verticle.) Once you find it, put your hand on it while cranking to see if its buzzing. PCM could be an issue.

Mine died about 2 1/2 months ago - I got nothing no Wait to Start, no fuel pump....dead.

Has your truck had the CPS (crank position sensor) changed? There is a recall for these and it "Potentially" could be it. If the PCM doesn't see input from the CPS the truck won't run.

Just some suggestions. Good luck!

[superduty1987]

could that one bad battery cause that box to buzz i cant try it yet still waiting on a battery this morning but i am sitting ouside right now looking over the truck and waiting on replys so i can check on stuff as you guys give me tips...lol

[SuperCrutyPS]

When my batteries went bad....ever once in a while it would just crank until the batts were dead. No start. Replaced my both batteries - All good ever since. I don't recall any buzzing when that would happen. BUT, I've seen weird things happen with vehicles. It's possible I suppose.

[superduty1987]

if there is a recall on it do i have to pay out of pocket for it? i bought the truck used last feb it been almost a year ago ? maybe its a dum question but i would like to know

[SuperCrutyPS]

Nope - Free.

You can probably call a dealer with your VIN to see if the truck had been in for it.

If you bought it from a private party it may not have been done.
If you bought it from a dealerr, they may have done all the updating.

Still worth checking it out.

[superduty1987]

i am going to be changing out the filter in twenty or so, now i read and heard of dringing the water fuel separator. I found the yellow lever and opened it and diesel poured out onto the ground i did this for ten seconds then turned the lever back. I opened up the filter housing and it drained the fuel out. I am thinking before i put the new one in i am going to fill the housing back up with fresh diesel then install the new filter. Is this the process? i am scrared of getting air into the fuel system ? if this is not the proper way then what is? i have never drained the water fuel separator ever ? so do i leave it empty and put filter in or do what i think is correct??...lol

[superduty1987]

i bought it from a mom and pop shop i doubt they did

[SuperCrutyPS]

I do what you described. After the lid is back on, I turn the key to on a couple of times without starting. The fuel pump will prime the system. Usually starts right up after that.

You're probably right - Mom/Pop may not have known to check.

[superduty1987]

i was going to get a cup of diesel and pour it into the housing with cap off. then install the fliter. But if the truck can prime its self then i will just put the filter in and turn key with out starting it a couple of times and let it do its our work then if thats what you do then