Hard start TSBs 18-015-00 Rev. A & TSB 18-024-00 applied?

[rashwor]

For those of you with either TSB 18-015-00, revision A or TSB 18-024-00 applied, how do you get your lift pump to prime the fuel filter after changing?



I have TSB 18-015-00A applied and it changed the operation of the lift pump so that it only runs for a second or so when the key is turned on initially. Also, the bumping of the starter does not cause the lift pump to run at all. Blasted stealers!:--)



What do you recommend when changing the fuel filter?



TIA

 

[Kraut67M]

rashwor



I had this done too along with a liftpump and have been wondering about this too. My question is the pump not coming on or is it too new to make noise. I have heard it for a quick second when fist turning the key without pumping starter, but not when bumping starter. I am going to hook up my guage and see if the pump runs, but is just quiet. Have you tried that?

Kraut67m

 

[BigDaddy]

Although I cannot comment on the TSB, I recently replaced my lift pump and it was no quieter than the old one.

 

[csutton7]

I've been told that it's possible that the program didn't take as mine is doing the same thing and just partially fixed my other probs--that's with the 18-15-00 TSB---I'm going back in tomorrow AM to try it again with 18-014-01 or the 18-15-00 to see if the 2nd time around works---I'll let you know if it worked on this issue---as for now you are out of luck on the lift pump priming issue as far as I know----chris

 

[rashwor]

what i have heard

Here is what I read on TDR not long ago on a thread. I wish I could remember which one and who said it.



Basically what these TSBs are supposed to do is to not pump so much pressure to the VP44 during start mode. The thread said that the lift pump during start mode was sent only about half the voltage by the ECM it gets when the engine is actually running. The run time is also reduced during the start mode. This reduces the pressure fed to the VP44 and stops the engine from having to turn over several times before firing.



I had this done when my lift pump was changed out under warranty. I carried the truck to the dealer (Mike Perry, Nacogdoches TX) to have the fuel filter changed. They changed the filter and after the filter change, the truck would turn over several times before it would fire... never done this before. I tried to tell them that it had to do with the fuel filter change they had done. They tested the lift pump and showed the pressure to me on the test gauge. It would drop to 3-4 psi under WOT, so they replace the lift pump. Still did not fix the turning over several times before it would fire problem, so I carried it back again. This is when the found and applied the TSB. This is when my lift pump started being a wimp. I did not know at that time what these TSBs did. After the application of the 08-15-00A to mine, the truck still turned over several times before it would fire. I figured out that the problem was the water drain on the fuel filter canister leaking and letting pressure escape from the system or letting air into the system, but by this time, the TSB has been applied.



Can Dodge unapply a TSB to the ECM? This would solve my current lift pump problem.



CSutton, keep us posted.



My thought is that I would wire a direct wire to the lift pump controlled by a switch, but bypasses the ECM control. Flip the switch, the lift pump runs, fuel filter canister filled, air removed, rock and roll! Would this work?



Sorry for the long post.



rashwor

 

[rashwor]

Kraut67M...

I put the gauge on mine two weeks ago (Briarhoppers test gauge) two weeks ago when my MAP sensor died. The gauge showed pressure when I could hear the pump running, and no pressure when I could not hear the pump.



When I turned the key on, I would hear the pump, and the gauge would show about 7 psi, and then drop off quickly when the pump stopped. I don't remember what affect bumping the starter had, but I want to say that the lift pump did not run and the gauge showed no pressure.



My pressures are still good... nothing less than 9 WOT, full load, 12-13 idle - POST filter.

 

[Kraut67M]

Thanks All for the responses.



Being an engineer and working with very complex equipment, I have never felt comfortable making or allowing a supplier to make changes to the tooling unless I understood excactly what the change did. I believe that DC owes us an explanation as to what this TSB rally does.

Perhaps we may get lucky and an engineer from DC can answer. Please!!!!



With respect to priming the filter, this may be an issue. I guess I will find out.



Kraut67m

 

[csutton7]

well it didn't help---there's the other TSB 18-014-01, but that's for all trucks except for California--so I couldn't get it---you might try it----good luck---it looks like the BD5's will have to be removed and something else will be installed or I will have to get a federal ECM-----chris

 

[Chipstien]

I have a question...

When I first turn the key on my pressure is 15 to 16. At idle its 14 to 15. At 65 mph it is 13 to 14 and at wot and 5x5 it drops to 6. Is the lower pressures at startup only when reflashed with the TSB's. My truck has had no TSB's or reflashes of any sorts that I am aware of. PS. When the stock pump went out I moved the lift pump back to within 12 inches from the tank and used the 3990105 pump.

 

[rashwor]

Thanks for the update csutton. Sorry about your troubles and I hope you get them resolved. If you are having the same problem I am, you may have a leak in the fuel system somewhere that is allowing a little air in. I know where mine is; it is the water drain valve down near the bottom of the fuel filter canister. When I open the water drain, the valve gets wet all over the outside with diesel. As long as the valve is closed, it is not leaking.



Christian (sp?). Yes, it should only be on trucks reflashed or updated with these TSBs. Your pressures look great. Judging from your startup pressure (when you turn the key on), you don't have one of these TSBs applied. Mine is about 5 psi when I turn the key on, but runs no less than 8 psi once the truck is running, no matter what the conditions (cruisiong, WOT, etc).



The next time it is at the dealer, I will see if I can have the TSB removed... I highly doubt it. :{ :-{}

 

[Chipstien]

Originally posted by csutton7

well it didn't help---there's the other TSB 18-014-01, but that's for all trucks except for California--so I couldn't get it---you might try it----good luck---it looks like the BD5's will have to be removed and something else will be installed or I will have to get a federal ECM-----chris

Chris, where can I learn about this TSB. It isn't in the TSB section.

 

[csutton7]

check out Dave Fritz's web site--I think it might be there, but if not call up to Bill Kondolay(866)504-4002 they have a little info on it---that's where I got the # from---chris

 

[Chipstien]

Thanks Chris.