ive got a problem

[GoldieStroker944]

hello all first just wanted to say hi i am kind of new to the page but this is the best thing i have ever seen for psd now on to my problem i have an 01 psd and here latley it sounds like it is mising and idles rough and the injectors sound like they are knocking and when i get to higher speeds(45mp) it shakes really bad i changed the cam sensor and that dident do anything i have hear the it is my injection control module but i was just wondering what some of your guys thoughts were are there any other sensors that i need to check the truck just turned 100 000 miles so i am sure there are some that i need to check but ya just trying to figure out how these babys work so i hope to hear from you guys

[mschn99]

get the valve covers off of it and check the wiring harnesses under them. You probably have one of the two coming disconnected. There is always the possibility its a bad injector too....but the harnesses are more common....

[sldghamr]

i had that knocking sound years ago. ended my fuel pump was going out.

[GoldieStroker944]

so if it was the harness under the valve cover comming disconected then that could be why every once and a while it will run fine till i either get into it real hard. when this problem first started it just did it till the truck got to operating temp then it would run fine now it just does it all the time??

[mschn99]

Originally Posted by GoldieStroker944

so if it was the harness under the valve cover comming disconected then that could be why every once and a while it will run fine till i either get into it real hard. when this problem first started it just did it till the truck got to operating temp then it would run fine now it just does it all the time??

if the harness is barely making contact....when you get on it hard the electrical current then cant pass through well enough.....but based on what you just told me i would say it is probably an injector. It could be dropping fuel pressure too as stated above. You want to test fuel pressure and then do a buzz test and a cylender contribution test on a scan tool if you can....

[GoldieStroker944]

ok i will see what i can do thank you i have had it scanned but i dont remember what the codes are but my mech told me that he thought it was the injection control mod but those are like 1000 bucks so i wanted your guys opinion but i will definatly get it in and check it out and see what i can do thanks alot

[mschn99]

the code he got just stated "idm codes detected" which means it has detected injector codes. The only way to get the actual injector code is to run a buzz test or cylender contrubution test.

[GoldieStroker944]

ok i will keep that in mind thank you

[alabamafrog]

Sounds like how my truck acted when I got a bad load of fuel that crapped up my whole fuel system and injectors. Have you changed the fuel filter since it started acting up? May be UVC wiring but fuel system would be my first guess. There is a big difference between reading codes and doing a real scan and buzz test and real contribution test. Make sure your mechanic know what he is doing and is trustworthy. Total cost for a full scan and all the tests should be around $75. Hooking up a fuel pressure gauge to the heads that you can see in the cab while making hard runs will help a lot with diagnostics. Again it is free and relatively easy to inspect the valve cover wiring.

[GoldieStroker944]

well i know that the mech that i take my truck to is trust worthy i have been doing diesel buisness with him for a couple of years and he has never failed me yet but funny you should ask about the filter because i just changed it right before my truck started acting up and it could be bad fuel becuase got knows that 15ppm sulfer diesel sucks if you ask me but ya i guess i cant do anything about it now but i will for sure try and get it in and get it further tested because i want to be as accuarte as a can be