[BPA]

My truck has been throwing the 216 code for the last week or so. I get an occasional dead petal in 2nd to 3rd gear(more like a hesitation) but it immediately clears up and runs fine. Over the last 2-3 weeks Ive been having hard starts in the morning or when the truck hasn't ran in a day or so which points to a fuel leak but I can't find it at all. I don't have any puddles or anything obvious on injectors lines, inj. pump, lift pump, fuel filter canister, nor the drain valve. Fuel heater has been deleted and plugged. banjo on the back of the head looks fine with no sign of a leak along with the tee in the return line.

Things to note: Fass ddrp has been relocated in front of the tank with 3/8" lines, Fuel psi gauge reads 21 at idle and can only pull it down to 17 at wot, fuel psi has been tested with a mechanical gauge and it reads exactly like my elect. gauge. Fuel psi usually is 19-idle and 14wot.
I just replaced my fuel filter and went around making sure everything was tight and took it for a test drive and got the 216 again. So….where else can a fuel be leaking from? Is it possibly something inside the fuel tank? and has now caused my vp to go out?

 

[BPA]

Installed Timbo Apps about 6 months ago as well

 

[me78569]

What have your temps been like over the last couple weeks?

I would guess you are sucking air into the system, which wouldn't show any "leak". Park nose downhill and see if the issue goes away.

However you p0216 code paired with drivablity issues pretty much mean it is time for a new VP.

 

[BPA]

Temps have been anywhere from 40-80 degrees since this has been happening. It started doing it in warmer weather. I will jack up the back end overnight and see fit that helps with the cold start.

 

[Yankneck696]

If it's happening in the warmer weather, you most likely are due for a new VP44. You may be able to get a bit more time out of it with some 2 stroke in the fuel for lubricity.
Start saving up.

Ed

 

[me78569]

I would agree

 

[BPA]

Dang the luck, I do already add 1oz/1gal of tcw-3 every fill up. I probably need to pull my tank down and check my fuel tank out, what should I upgrade my fuel tank set up to?

 

[me78569]

I like my draw straw.

 

[BPA]

Another thing I noticed while doing a test drive today was that my scan gauge would only read boost up to 17.8 while my electronic gauge showed up to 25. Anyone know why? I know it used to read higher and accurately.

 

[Mopar1973Man]

Here is what a P0216 could be...

When the timing piston can no longer advance timing when commanded then the P0216 could occurs. Since your fuel pressure is good then its not a fuel pressure problem but a piston seizure.

As for the fuel leak the best way I now to find external leaks is to use a good degrease like I use "Power Clean" at work and then take your time with a 3000 PSI power washer and absolutely peel all the crude off the engine allow it to dry. Then fire it up and leave idle and watch all the fuel fittings closely. If you need place cardboard under the truck to show you drips.

 

[me78569]

your map might be bad and not reading above a certain psi, guessing 3psi according to the 17.x number.

14ish psi for standard atmosphere pressure plus 3 psi gets you the 17 number.




Figure out your fuel issue though.

 

[BPA]

What have your temps been like over the last couple weeks?

I would guess you are sucking air into the system, which wouldn't show any "leak". Park nose downhill and see if the issue goes away.

However you p0216 code paired with drivablity issues pretty much mean it is time for a new VP.

I did park downhill overnight and it seemed to start up better than on flat ground. I washed the engine off and high idled for about 45 min and still couldn't find any leaks...I'm stumped

 

[cummins6sp5.9]

Check or tighten the fitting at the back of the head.

 

[me78569]

The fuel system may not leak fuel out, rather it might actually "leak" air into it. That would be why you might not be seeing a leak.


However pointing nose downhill should be much improved when it comes to starting the truck if this was the issue.

You say it "seemed to start better" doesn't really lead me to believe that you noticed a big difference.

 

[Junkman]

I've dealt with a primitive water system at my cabin in TN. Long crank = losing prime. Leaks are almost always at joints or fittings. I would install new washers at banjos and prints on injector tubes and T fitting. Do the same for any other joint.

Clean injector tube ends with scotch brite, not sand paper. Be thorough. Parts are cheap in this case.

 

[BPA]

The fuel system may not leak fuel out, rather it might actually "leak" air into it. That would be why you might not be seeing a leak.


However pointing nose downhill should be much improved when it comes to starting the truck if this was the issue.

You say it "seemed to start better" doesn't really lead me to believe that you noticed a big difference.

It did start better like it is supposed to, should have worded it differently.

 

[dozer12216]

You do not seem able to comprened a air leak into the fuel system............
Fuel molecues are larger than air. Between the fuel cooling down after shutdown causing a slight negative pressure in tank. (equals suck) and the weight of fuel will go to a lower level if air can seep through a hole and allow fuel to drain back into tank.
The main issues I see causing this are loose fitting and three way fitting at back of engine and banjo bolt at back of head. You MUST get dirty and get wrenches on these fittings. The next is o rings on crossover tubes. Behind injector line fitting at head. These Orings are 1/2 inch outside diameter and 3/8 inside diameter. Avaliable at any hydraulic shop or even the universal oring kits. Cummins and Dodge will absolutelly rob you for these parts.
After the above likely most likely are VP 44 fittings, Fuel filter seals and lift pump seals. Then there is always possibility of age cracked line or damaged fitting at fuel tank..
Getting fustrated is non productive and doing same repairs repeatelly expecting different results is useless...

 

[Off-road]

question, does the edge ez do boost fooling? if so that could be the reason for different boost readings....