installed high idle, gently washed the engine, no pressure and mild cleanser. everything checked OK, idle for 15 minutes no problem. next day headed about twenty miles on the highway went up a gentle slope and noticed my fan on for longer than usual. tranny temp was about 185, just cruisin at 55. just about got to the top and my console started blinking "service brake system". ABS and park brake light stayed on also. Also, tranny limped (range shift inhibited). Pulled over, checked fluids, connections, etc all looked fine. restart did not clear it. let it cool down for an hour, restarted and noticed I could drive slowly in 3rd gear (on the column). had to pick up the family at a school function and had no problem going 4 miles, so tried to start after that and had no problems ?? called Onstar, no codes .


drove the next day to determine if a problem, nothing !! drove harder with the juice to see if I was going to break anything and it was fine.


Weird ?? should I take it in to get it checked out anyway ? sorry for the long post, any thoughts would be helpful.


marcEdited by: ski1

Marc


Was engine warm when you did this, never had it happen to me on the diesel but if engine is warm sometimes causes condensation in tight areas, such as plug connections etc. I run the engine after the clean up and blow with air hose. Also I try to use dielectric grease on all my electrical fittings and plug's


Genohttp://www.dieselplace.com/forum/smileys/Hug.gif

geno,





engine was not warm, only fired up to back out of the garage, test idel conditions and shut it down in the shade. did not wash it until 20 minutes later. I dried everything by hand and then let it air dry for about thirty minutes before I started it again.


i was not sure about adding grease on ECM/PCM connectors with their rubber seals

I have seen water accumulate in the Bale Connections (Juice) a day after washing engine as you describe.


Dollars to Donuts that was your problem.





Mac http://www.dieselplace.com/forum/smileys/Embarrased.gif

Ski


I was reffering to dieletric grease that stops corrision in connectors and bulkhead connections. It will not hurt the rubber if anything it will help in pushing them back together.


Genohttp://www.dieselplace.com/forum/smileys/Hug.gif

geno,


thanks, not sure what I was thinking but thanks for clarifying. I tore the pcm/ecm and juice connections apart today and everything looked the same as before install. I think I will add the grease pretty soon, would have done it today but do not have any

I am a heavy duty class 8 diesel mechanic and I use dielectric grease on any electrical connector I remove.Strongly recommended by Cummins and any major manufacturer.I can't count how many times I have steamed off a engine and got moisture somewhere in something and incurred a problem that I didn't have before I went to the steam rack.Usually I let dry out and all is fine.Which also usually ends my concerns.

my ABS light and warning buzzer will do the same thing after I wash the engine.... as soon as I start the truck after washing they'll come on and stay on. It clears itself up the next day..I assumed the connecters were getting a bit wet and took overnight to dry before clearing the light/buzzer.