01' hard start/knock/tons of white smoke after injector install - Page 3 - Competition Diesel.Com

Mudn_1 · 10-31-2011, 08:15 AM

Quote:

Originally Posted by CATmech945

Did he change the injector cups? Or at least clean the old ones up good before installing the new injectors? Sounds like some sort of issue with the way the o-rings are sealing. I've had them run rough after a fresh install but never as bad as you're describing unless something was installed wrong. O-rings flip flopped, etc.

Thats exactly what i said but no one else has mentioned the cups... i thought it was recommended to change the cups in a powerstroke every time you replace injectors....arent they bad about cracking?

sent from my damn phone

LReiff · 10-31-2011, 08:19 AM

They crack very easily if the injrctor hold down bolt aren't tight enough! Out of all the 7.3L injectors I've replaced I only had cup issues on one set and I fell it was caused by a loose hold down. Now that these trucks are coming in with well over 100K miles we're replacing cups more often.

Oil/fuel on the pistons will only cause problems on the initial start. We always leave the GPs out and crank the motor over by hand before we start them then we change the motor oil as well. If the engine is locking after it's ran awhile it can only be liquid entering the combustion chamber. If it's coolant there will be lots of pressure in the cooling system after you run it a while. If combustion gasses enter the fuel system all sorts of weird chit can happen but I've never seen one hydro lock. However it would be possible if it's leaking fuel badly enough that fuel enters the cylinders as soon as the key is cycled on...I would suspect this if there is a bad misfire that will not clear up and the cooling system appears fine. Cracked cups can also cause fuel/coolant cross contamination.

JJeepyjohn · 10-31-2011, 09:21 AM

Quote:

Originally Posted by Mudn_1

Thats exactly what i said but no one else has mentioned the cups... i thought it was recommended to change the cups in a powerstroke every time you replace injectors....arent they bad about cracking?

sent from my damn phone

No you dont have to replace the cups everytime you replace injectors. You should pressurize the cooling system thou while they are out and check the cup for leaks.. cleaning the cup should be a no brainer, spaying them with good parts cleaner is usually all it takes.Sometimes thou if the engine has been run hot the O-rings will stick and you can use an inj cup brush to clean them up nicely.

CATmech945 · 11-01-2011, 12:06 PM

Would it be safe to assume that your buddy doesn't know much about these engines?? I'm not by any means taking a shot at your friend but I've seen people literally yank the old injectors and stick the new one's in without looking in the hole simply because they don't know any better. I would pull the injectors back out, check the order of the o-rings, pressure test the cooling system for leaks and clean the cups good. Check the oil and coolant too and make sure it doesn't have fuel in it. It's really easy for someone to screw the process up especially if this is their first whack at it. If the problem persists then go to bean's.

LReiff · 11-01-2011, 01:24 PM

Just pulled injectors out of a 169K mile '00 F550 this morning with rough run issues, white smoke and low power. All the injector tips have major carbon buildup and one injector cup is cracked.

JJeepyjohn · 11-01-2011, 01:51 PM

Which cup.. just curious

Mudn_1 · 11-09-2011, 01:08 PM

Quote:

Originally Posted by CATmech945

Would it be safe to assume that your buddy doesn't know much about these engines?? I'm not by any means taking a shot at your friend but I've seen people literally yank the old injectors and stick the new one's in without looking in the hole simply because they don't know any better. I would pull the injectors back out, check the order of the o-rings, pressure test the cooling system for leaks and clean the cups good. Check the oil and coolant too and make sure it doesn't have fuel in it. It's really easy for someone to screw the process up especially if this is their first whack at it. If the problem persists then go to bean's.

yes.....

I would have done things differently, although I am powerstroke stupid too.... but I have done enough injector installs on cummins to know precautions to be taken.....

and NO word on the truck, i havent spoken with him in a while..

*ctdiesel99* · 11-09-2011, 01:15 PM

as soon as you hear from him please let me know!!

JJeepyjohn · 11-10-2011, 08:05 AM

Did you two have a lovers quarrel and now aren't speaking ?

JJeepyjohn · 12-10-2011, 09:49 PM

Waiting..........................

11-01-2011, 01:24 PM	#45
LReiff Name: LReiff Title: The Antistock Status: Not Here Join Date: Apr 2009 Location: Newburg, PA Member`s Gallery Posts: 9,201	Just pulled injectors out of a 169K mile '00 F550 this morning with rough run issues, white smoke and low power. All the injector tips have major carbon buildup and one injector cup is cracked. Last edited by LReiff; 11-01-2011 at 01:28 PM.

11-01-2011, 01:51 PM	#46
JJeepyjohn Name: JJeepyjohn Title: Make Me Fries Status: Not Here Join Date: Apr 2006 Location: Murfreesboro TN Member`s Gallery Posts: 3,807	Which cup.. just curious __________________ 2001 F-350 CC LWB Island Blue TS Performance,Suncoast TC Full Force Diesel Stage 1 Injectors Police Interceptor Pkg. 1999 Dodge 2500 QC 2wd COMPETITIONDIESEL.COM 1998 Ranger Interceptor 6BT FIREPUNK Golden Nugget Competition Stage1 DPC Billet Triple Disc Converter

11-09-2011, 01:15 PM	#48
ctdiesel99 Name: ctdiesel99 Title: Comp Diesel Sponsor Status: Not Here Join Date: Nov 2008 Location: Lansdale, PA Member`s Gallery Posts: 2,789	as soon as you hear from him please let me know!! __________________ http://www.turn14.com 04.5 QC/SB 10.35 @ 135mph 2014 Jeep GC SRT

11-10-2011, 08:05 AM	#49
JJeepyjohn Name: JJeepyjohn Title: Make Me Fries Status: Not Here Join Date: Apr 2006 Location: Murfreesboro TN Member`s Gallery Posts: 3,807	Did you two have a lovers quarrel and now aren't speaking ? __________________ 2001 F-350 CC LWB Island Blue TS Performance,Suncoast TC Full Force Diesel Stage 1 Injectors Police Interceptor Pkg. 1999 Dodge 2500 QC 2wd COMPETITIONDIESEL.COM 1998 Ranger Interceptor 6BT FIREPUNK Golden Nugget Competition Stage1 DPC Billet Triple Disc Converter

12-10-2011, 09:49 PM	#50
JJeepyjohn Name: JJeepyjohn Title: Make Me Fries Status: Not Here Join Date: Apr 2006 Location: Murfreesboro TN Member`s Gallery Posts: 3,807	Waiting.......................... __________________ 2001 F-350 CC LWB Island Blue TS Performance,Suncoast TC Full Force Diesel Stage 1 Injectors Police Interceptor Pkg. 1999 Dodge 2500 QC 2wd COMPETITIONDIESEL.COM 1998 Ranger Interceptor 6BT FIREPUNK Golden Nugget Competition Stage1 DPC Billet Triple Disc Converter

11-01-2011, 12:06 PM	#44
CATmech945 Name: CATmech945 Title: Green Behind the Ears Status: Not Here Join Date: Oct 2010 Member`s Gallery Posts: 93	Would it be safe to assume that your buddy doesn't know much about these engines?? I'm not by any means taking a shot at your friend but I've seen people literally yank the old injectors and stick the new one's in without looking in the hole simply because they don't know any better. I would pull the injectors back out, check the order of the o-rings, pressure test the cooling system for leaks and clean the cups good. Check the oil and coolant too and make sure it doesn't have fuel in it. It's really easy for someone to screw the process up especially if this is their first whack at it. If the problem persists then go to bean's.