This problem has me stumped!

[pepsi71ocean]

19 hours ago, my99ram said:

Swapped it with the horn relay.  Went for a 10 mile test.  No problems, ran fine.  However, it started and ran fine for about 100 miles after the first time it quit before it quit the second time.

I hate intermittent problems.

 

My Fuel pump relay (on the lower left side of the PDC) gets gnarly hot when I'm running the truck. You may not notice this as an issue if your using it for the horn as the relay isn't running when the engines running like the FP relay is for the VP-44.

 

Also I believe that that throws a code, it dies throw a hard code for me on my 99 when I forget to put it back into the PDC.

[my99ram]

5 hours ago, IBMobile said:

The relay is needed if there is an electric lift pump used.  The stock system has the  ECM powering the lift pump directly.  With this mod the power for the pump is drawn from the PDC and not the ECM.

 

I too have a Fuel Boss lift pump and have the electric lift pump disconnected.   I only run the electric lift pump to prime the system. 

Thanks to both Dripley and IBMobile for clearing that up.

So I guess my next option is to drive til it dies again or not.  I am hoping for the drive option.

Edited December 7, 2018 by my99ram

[my99ram]

Update:

I had a check engine light that stayed on after the truck hard started after it quit. Code P1689. Did NOT clear code.

Swapped fuel pump relay with the horn relay.

Truck started and ran with the check engine light still on.

Bought and installed a new fuel pump relay.

Started the truck and all the normal dash warning lights correctly cycled on and then off.

The check engine light cycled itself off.  I did NOT clear the P1689 code.

Went about 12 miles turned the truck off, waited about 5 minutes, started it back up, all lights normal cycle and check engine light went off again.

Did the truck reset its own 'check engine light' code?

Did I fix my problem? 

Only time will tell I guess.

[int3man]

On ‎11‎/‎27‎/‎2018 at 7:21 PM, int3man said:

I chased intermittent Engine shutting off.  It was the relay.  Cheap fix!!

 

Michael

It is still working for me!!!!  And yes I was able to reset the Check engine light.

 

Michael

Edited December 15, 2018 by int3man

[Mopar1973Man]

11 hours ago, my99ram said:

Did the truck reset its own 'check engine light' code?

 

No it won't.

 

ECM and PCM only drop the CHECK ENGINE light after about 5 run cycles that do not report the error. 

 

ECM and PCM can only self erase codes after 40 warm-up cycles. This means the engine has to start below 140 coolant temperature and rise above 160 coolant temperature without tripping the same code again. This usually takes about month and half for most to happen. 

 

Highly suggest you just get an OBDLink LX and reset the codes yourself. 

[dripley]

Mine has turned the CEL on its own. Just happened today. Got a 237 code when goingmto eat lunch. When I came back and restarted the light was off. The code however is still there. Gremlins.

[Dieselfuture]

32 minutes ago, dripley said:

Mine has turned the CEL on its own. Just happened today. Got a 237 code when goingmto eat lunch. When I came back and restarted the light was off. The code however is still there. 

I was hoping you had that fixed with your ground splice fix 

[dripley]

9 minutes ago, Dieselfuture said:

I was hoping you had that fixed with your ground splice fix 

Worked fine until today but I only got the code the truck ran fine. The splice I fixxed was the 5v supply to the other sensors not the one to the map. I did not understand that one. But we shall see, about to hit the road back home.

[my99ram]

Thanks for the replies and the info.  I have a reader and will reset the code.

Now hopefully I can be as lucky as Int3Man.

[Mopar1973Man]

2 hours ago, dripley said:

Mine has turned the CEL on its own. Just happened today. Got a 237 code when goingmto eat lunch. When I came back and restarted the light was off. The code however is still there. Gremlins.

 

Again... Codes can't self erase till 40 warm up cycles occur. This means cooldown below 140*F and warm up past 160*F 40 times before the codes erase.

[dripley]

2 hours ago, Mopar1973Man said:

 

Again... Codes can't self erase till 40 warm up cycles occur. This means cooldown below 140*F and warm up past 160*F 40 times before the codes erase.

Again, I still have the code, you Idaho potato farmer you!!

 

Kidding aside, i have had some codes self erase but never tried to count any cycles. I do believe you, just lazy sometimes.