TheDieselPage.com Forums
 
The Diesel Page Forums

2019 - TDP's 23rd Anniversary
What's New | Feature Articles | Product Reviews | Member's Area | Free Forum Registration
Duramax 6600 Diesel Page | Advertiser's Section | Classified Ads | The Diesel Page - Publications


Go Back   TheDieselPage.com Forums > 2001-2019 Chevrolet & GMC 2500HD/3500 Light Trucks > Duramax 6600
Register FAQ Members List Photo Album Mark Forums Read

Duramax 6600 Welcome to the Internet's first Duramax 6600 diesel discussion forum for the LB7, LLY, LBZ, LMM, LML, LGH & L5P RPO code engines. Tips on performance, fuel economy, troubleshooting and more.

Reply
 
Thread Tools Display Modes
  #1  
Old 11-18-2012, 09:16 PM
dmax_lineman's Avatar
dmax_lineman dmax_lineman is offline
Newbie
 
Join Date: Nov 2012
Location: taft, ca
Posts: 7
Default Loss of power and runs rough

I bought a 04.5 Dmax about 5 months ago, sense then I've had very few problems with it. The problems consist of pulling to the right due to the idler and pitman arms and upper ball joint dismembering itself from control arm. Until recently, about a month ago i noticed that it doesn't pick up the way it when I first got it. I have replaced the fuel filter, that did no justice. So I assumed it had to be an injector problem but the truck is new to me, so I called the closest dealership and had them run the vin# to make sure all recalls had been taken care of on this particular truck: and the had. So the injectors were replaced due to the recall about 10 months prior to my purchasing it. Now I'm stumped, this is my first diesel so this is all new to me. I'm pretty mechanically inclined so doing the work myself isn't a problem, knowing where to go from here is.


I'm running 4in Banks exhaust
Banks cold air and intercooler
Banks sixgun programmer
32in Mckey Thompson MTZ tires

My buddy put his basic code reader up to it and dispite the check engine light not being on it did through a few codes out. One was for coolant temp, one was a misfire in cylendar six, one just said comp.( which I just figured was due to the programmer ), and the last on just said EGR with no other discription.

Does anyone have any suggestions? After all the other stuff Ive done to it I have just about depleted my savings, so cheapest but most efficient way possible.
Reply With Quote
  #2  
Old 11-19-2012, 04:42 PM
Mark Rinker's Avatar
Mark Rinker Mark Rinker is offline
Enthusiast
 
Join Date: Jun 2003
Posts: 5,813
Default

Welcome aboard. I am pretty sure that you'll find this to be the best truck you've ever owned.

Unless you are experiencing knocking and/or white smoke visible in your exhaust (either at idle or under acceleration), or black smoke under acceleration (overfuel condition, lacking enough boost to burn fuel present) I'd say you are looking at a simple fuel or air supply problem. Since you've replaced the fuel filter, how about the air filter? Any chance of restriction or temporary collapsing of an air inlet tube during high demand/acceleration?

The codes could be misleading since they may be from BEFORE the injectors were replaced. I'd take note of them, then clear them all and start again.

If you are NOT seeing white or black exhaust smoke under any of the above conditions, no fuel rattle, and no oil dilution/making oil at the dipstick...

Q1: Is it possible that there is a problem with the power adder, and you're not getting the additional fuel rate that you had grown used to?
Q2: Could you have a leak at one of your aftermarket intercooler connections, and be leaking charge (boost) air?


Keep checking in as you troubleshoot. I think you'll find the root cause of this one to be a simple one.
__________________
2011 Chevrolet Tahoe 5.3L daily driver
  • Previous owner of two 1994 6.5L K3500s, '01, '02, and '05 6.6L K2500s, '04 C4500, '06 K3500 dually, '06 K3500 SRW, '09 K3500HD SRW, '05 Denali
  • Total GM diesel miles to date : ~950K
Reply With Quote
  #3  
Old 11-19-2012, 07:16 PM
dmax_lineman's Avatar
dmax_lineman dmax_lineman is offline
Newbie
 
Join Date: Nov 2012
Location: taft, ca
Posts: 7
Default

Thank you for your prompt response.

I check the connection at the intercooler and found them to be secure and leak free. There is no sign of any color smoke coming from the exhaust, and when the problem first occurred I was in the middle of passing about five diesel trucks and the sixgun programmer was turned up to 6. The check engine light did appear as well as the loss of power. I pull over, turned the truck off and reset the programmer by unplugging it for about 30 sec. and plugged it back in, and the truck seemed to be back to normal, for a couple weeks anyways. Then began the gradual depletion of everything. Although the check engine light went off I still borrowed the OBDll code reader and those codes popped up so I cleared them and waited a few days to read it again. The codes came back and have been there ever sense. Any and all suggestion or ideas are appreciated and welcome. Thank you for your time.
Reply With Quote
  #4  
Old 11-19-2012, 07:42 PM
DmaxMaverick's Avatar
DmaxMaverick DmaxMaverick is offline
Administrator
 
Join Date: Apr 2001
Location: CA
Posts: 12,259
Arrow

If the EGR isn't blocked and disabled, it's probably fouled. The excess soot can also foul the vane position servo. Running the Six Gun on level 6 is not a good idea, especially at highway speeds or with a load. If your tranny is stock, you'll be shopping for new very soon. Level 6 also expedites EGR and servo fouling, moreso than lower levels.
__________________
1985 Blazer 6.2
2001 GMC 2500HD D/A
2014 Chevy Cruze Diesel - Fabulous car, no problems at all, but sold Nov. 2016 @ 55K miles.
dmaxmaverick@thedieselpage.com
Reply With Quote
  #5  
Old 11-19-2012, 09:34 PM
dmax_lineman's Avatar
dmax_lineman dmax_lineman is offline
Newbie
 
Join Date: Nov 2012
Location: taft, ca
Posts: 7
Default

Thanks for the info about the six gun. I'm not really too fond of not knowing or being able to monitor or even see the parameters. It didn't come with gauges or a digital screen, just the component and a dial. I never really turned it up past 4 except at night while passing due to the difficulty judging how far away the car in the other lane is.

Now, that being said, my next hypothesis is the head gasket could possibly be blown or maybe leaking by. My reason for this conclusion is: while going over the inlet and outlet to the intercooler I noticed that the coolant hoes on the driver side was slightly collapsed and the coolant level was a little low(less than 2qrts.) So it made me wounder where it went. Upon checking the oil level (which was full), it seemed like it didn't want to stay on the dipstick, and the oil pressure seems to be a little high.

Any thoughts? And what is normal operating oil pressure? Isn't there supposed to be discolored exhaust if the head gasket is blown?
Reply With Quote
  #6  
Old 11-19-2012, 09:54 PM
DmaxMaverick's Avatar
DmaxMaverick DmaxMaverick is offline
Administrator
 
Join Date: Apr 2001
Location: CA
Posts: 12,259
Arrow

That's a risky proposition, a power programmer and no gages.

Head gasket? Difficult to say. Any one of the symptoms you list don't indicate that, in themselves. A collapsed coolant hose is more likely a failed recovery tank cap. "Slightly" collapsed may be normal. Coolant loss can also be caused by a bad cap. All of it depends on how much loss, and under what conditions. If it's very slight, you may not notice foggy exhaust (steam), or the associated odor. Start the engine after cooling overnight, and check the upper coolant hose after a couple minutes idling (as soon as the temp gage begins to move, but not hot). If it gets very hard, you have a bad gasket. If it seems normal (neutral pressure), then it's less likely.

Oil pressure depends on other factors. Cold idle pressure should be 60-80 PSI. Hot idle should be 20-40. It can be higher/lower, depending on the oil brand, grade, and other conditions. If you have coolant in the oil, it will usually have no trouble sticking to the dipstick, and will be cloudy or milky. To confirm, drain some oil after the engine cools overnight. Most of the water, or water saturated oil, will settle to the drain.
__________________
1985 Blazer 6.2
2001 GMC 2500HD D/A
2014 Chevy Cruze Diesel - Fabulous car, no problems at all, but sold Nov. 2016 @ 55K miles.
dmaxmaverick@thedieselpage.com
Reply With Quote
  #7  
Old 11-19-2012, 11:57 PM
dmax_lineman's Avatar
dmax_lineman dmax_lineman is offline
Newbie
 
Join Date: Nov 2012
Location: taft, ca
Posts: 7
Default

I appreciate all your help,

The oil on the dipstick is not milky nor does it look to me like the is any foreign liquid present, but the dipstick is stainless and for some reason (it's probably been reading this way sense I acquired the truck) I just noticed the oil doesn't want to really adhere to end of the stick except for where the reading marks are.(the end is round and forms an point)

Anyways, the level of the coolant was about an inch under the "FULL COLD" mark but not as low as where it drops down to go into the radiator. As for the hose, it still had plenty of room for me to squeeze it and make the water go back into the fill tank.

To better explain, the truck was my daily driver. It went back and forth to work (about 8 miles a day) and to pick up the kids 3 to 4 times a week (round trip approximately 110 miles 3 to4 times a week). When I noticed a drastic decrease in performance I parked and have driven it maybe twice in a months time, for no more than a mile or two either time.

Now I have cleaned the MAF sensor, just to rule it out as a suspect, it seems to have developed a slight tick but it doesn't go in rhythm with the motor. It sounds like its coming from the a/c compressor. Any other ideas or suggestions before I begin dismantling things to replace the gaskets?, which is the culprit in my personal opinion.
Reply With Quote
  #8  
Old 11-20-2012, 12:58 AM
dmax_lineman's Avatar
dmax_lineman dmax_lineman is offline
Newbie
 
Join Date: Nov 2012
Location: taft, ca
Posts: 7
Default

566817_494162120617034_1736956786_o.jpg

567155_494162373950342_1070339304_o.jpg

567348_494161737283739_148970691_o.jpg

567446_494161713950408_464140454_o.jpg

567587_494161933950386_1022808628_o.jpg

this what I'm working with. sorry they aren't that clear its dark and the battery on my phone is dieing so the flash doesn't work.
Reply With Quote
  #9  
Old 11-20-2012, 01:44 AM
DmaxMaverick's Avatar
DmaxMaverick DmaxMaverick is offline
Administrator
 
Join Date: Apr 2001
Location: CA
Posts: 12,259
Arrow

Your oil checking sounds normal. Mine has always been that way. As long as you can check the level by the notches, it's normal. I've never noticed oil adhering to the "bulb" or cable part of the dipstick. As long as the oil you are seeing is normal, nothing to worry about there.

Your coolant level may or may not be normal. It will decrease over time, normally. The description of the hose sounds normal, as well. If it isn't sucking down flat, it isn't significant. A little is normal, after a cool-down. Not a reason to suspect head gaskets.

If the DTC's are persistent, you really need to read/report them better. The actual code numbers would be much more helpful.

I'm not sure what you are trying to show/say with the pics. In any case, any time you have a running issue, and you are using a power module, the first thing you should do is remove/disconnect the module. Get it out of the loop so the system can be properly diagnosed. Often, the problem is the module, or as a direct result of using it (such as a fouled EGR). Now, in CA, if you have emission system codes, you can't pass the smog inspection. You have to get it clear, one way or another.
__________________
1985 Blazer 6.2
2001 GMC 2500HD D/A
2014 Chevy Cruze Diesel - Fabulous car, no problems at all, but sold Nov. 2016 @ 55K miles.
dmaxmaverick@thedieselpage.com
Reply With Quote
  #10  
Old 11-20-2012, 04:22 AM
EdHale's Avatar
EdHale EdHale is offline
Enthusiast
 
Join Date: Feb 2000
Location: Maplesville, AL - Home Base
Posts: 503
Default

One more reason I have no desire to ever go back to California and definitely will never live there.
__________________
Ed
KM4STL

'06 Sierra LBZ 4x4 Crew SB, Titan 52 gallon fuel tank, TTT/Schefenacker Mirrors
'98 Suburban, 245,000 - sold 7-4-06
Reply With Quote
Reply

Tags
04.5lly, banks, duramax, loss of power, misfire

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -7. The time now is 10:22 AM.


Powered by vBulletin® Version 3.8.2
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Copyright 1996-2019 by TheDieselPage.com - All Rights Reserved