Engine/Transmission (1998.5 - 2002) 2000 24v problems

[CAROLINA CUMMINS]

Hello,



I was hoping I could get a little advice on this since I am not as familiar with the 24v as I am the 12v.



I replaced the LP on my cousin's truck(2000, auto, 279,000) The old one did not have any fuel pressure. It also smoked alot of white smoke revving up at an idle, in park or neutral. I replaced it(LP) and it seemed to run alot better, alot stronger and it did not miss as much at first. It will still miss alot when revved up, alot of white smoke, but will run good down the road, no missing.



I checked all the connections, and fuel lines, and the only place where I could tell it might suck air was the plastic fuel filter cap, I know I didn't tighten it down too tight, it looks like someone may have used the 1/2" drive part at one time, it is broke on that part.



I also checked the codes, none except 1693, on the odometer, then I disconnected the batteries for 30min to clear them(not sure if it did?) yes/no



When I was at town I went to autozone, and they hooked up the scan tool.

This is what came up.

PO234 Turbo boost limit exceeded

PO1689 No communication between ECM and Injection pump module

PO236 Map sensor too high too long



On the 1689, I did have the fuel system relay out, but before I disconnected the batteries(if that accomplished anything). It seemed to be real hot for the truck not running but a minute??



Any help would be appreciated.



Thanks, Steven

 

[DieselRam30]

You might want to try an APPS reset as opposed to simply disconneting the batteries. Is the white smoke only right after startup or all the time?

 

[Devan Manis]

Is the wastegate stuck shut also?

 

[CAROLINA CUMMINS]

It smokes even when warmed up, only revvving it up in park or neutral, it does not miss going down the road.

Wastegate? I'm not sure, If I get time I'll check



Thanks, Steven

 

[CAROLINA CUMMINS]

Did disconnecting the batteries clear the codes? I couldn't find a definite answer by searching the forum.



I think the problem doesn't occur until or is worse when the truck is warm. I cranked it this morning, and It didn't miss a lick, ran perfect.



Thanks, Steven

 

[Alphacowboy]

ya may have replaced the lift pump, but I bet you fried the Injection Pump (vp-44) mine did this exact same thing, no codes but the 1683. It ran one day, didnt the next, better get ready, because one of these days it aint going to run. Just to let ya know, thats what happened to me.

 

[CAROLINA CUMMINS]

Yeah, the VP44 may be on it's last legs, who knows how long the truck was run without much fuel pressure. He's only had the truck for a month or two.



The car lot/garage where he bought it is questionable, I have seen a few Cummins come from them that were ragged, or otherwise neglected. When I serviced the truck for him a month ago, It was lacking an air filter I was :-{} . I asked my cousin if he had messed with it, and he said no. So they have pretty slack inspection practices, I guess he didn't check before he bought it.



Thanks, Steven

 

[DieselRam30]

Did disconnecting the batteries clear the codes? I couldn't find a definite answer by searching the forum.

Possibly, but an APPS reset couldn't hurt. Check the wastegate and possibly look for a boost leak as well. What kind of fuel pressure is he getting?

 

[CAROLINA CUMMINS]

I don't have the truck here, he needed it back, it runs great down the road, If I get a chance I will check it out.





Thanks, Steven