|01-04.5 LB7 Duramax Powertrain Discussion of components that are directly involved in the power production and all that is needed to get and keep the truck moving . Engine , Transmission Ect|
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|04-27-2011, 03:13 PM||eBay Motors #1 (permalink)|
Join Date: Apr 2011
2001 injectors replacement
i have a 01 chevy truck , 200k miles now . i have been told by a local diesel mechanic that 3 of my injectors are near or at "worn out" . i have never had any injectors replaced . however when the truck was new in the 1st year and a half , there were two recalls (warranty) and all the injectors were replaced , each time . but since then no troubles . so my ??'s would this be normal wear for the mileage 200k . and if so why not replace all at the same time ? since the engine will be torn down anyway . for the majority of the last 10 years i have used a fuel additive , the truck is stock . any thought/comments welcome . btw the price i have was quoted for this work is $$$$$ .
|04-27-2011, 03:35 PM||eBay Motors #2 (permalink)|
Join Date: Apr 2010
it all depends, there's no real cycle for the truck in terms of injector life, some last 5k, some last 50k and there's some guys that go 200k. before you dump$$ in injectors i would request a look at the balance rates ( +/- 4 in park is good). what made you take your truck in to have it looked at?
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|04-27-2011, 03:39 PM||eBay Motors #3 (permalink)|
Join Date: Feb 2007
Location: Zeeland, MI
Your doing your part by running good fuel, additive and keeping the filters serviced
What symptoms are you having? "worn out" is a broad diagnosis
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|04-27-2011, 03:49 PM||eBay Motors #4 (permalink)|
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|04-27-2011, 04:18 PM||eBay Motors #5 (permalink)|
Join Date: Apr 2011
service engine light
the SEL came on about a week ago , while out of town . suddenly i lost power , couldnt go any faster than 40-45 . pulled to the side of the road , turned off the engine and waited a couple minutes . re started , SEL still on but seemed to be normal power . for the rest of the trip no issues . in fact the SEL went off . then this week a day ago (1 week after the original incident) noticed similar problem , eventually the SEL came on . so this am went to have the truck looked at . one issue was that i had gone a little too long without changing the fuel filter , my bad . i dont usually do that . but the shop did some other checking/testing , and discovered the injectors issue . he also did a road test with the diagnostic device plugged in to see what read out he would get . the ruck ran good . but he did suggest/recommend the injector issue . also he discovered two small coolant leaks , around the engine but didnt try to isolate them , as i needed the truck back today . i have had no real issues with this truck , up to this point (200k) . he indicated that 2 of the injectors were at +2.7 and 1 was at -3.4 . he said they all (injectors) should be between no more than -3.0 - +3.0 according to the factory spec.s . does this sound correct ?
|04-27-2011, 04:25 PM||eBay Motors #6 (permalink)|
Join Date: Mar 2011
It only makes sense to change them all since you will have money tied up in the labor for them. I would say you are probably at the point where you could use an injector change but you might not need it yet per se
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|04-28-2011, 12:53 PM||eBay Motors #7 (permalink)|
There is a service Bullitain on all model years for colapsing/kinked suction return hoses. Sorry I don't have it on me. Go to your nerest GM dealer and they can find it for you. As I remember it starts with A PIP.....Seems that under a load they will suck flat and cause either a P0087, P0093,P1093 code and go into limp modfe (won't go over 2K RPM). The repari is to relace the piece of hose that goes over the trans as it gets soft with age. Fixed mine, but took several months to find this Fix. Cost about $4 a foot for 3 ft of hose and 4 clamps.
2009 Chevrolet Silverado 2500 HD
LMM, Allison Stock
AMSOIL bypass oil system
|05-02-2011, 11:05 AM||eBay Motors #8 (permalink)|
Hey mferris, That is exactly what mine is doing, especially when im pulling something and going up a hill and it kicks into passing gear its starving for fuel. Where exactly is this hose so I can check mine?
2001 2500HD 6.6 Duramax
216,500 miles with no programmer
|05-02-2011, 11:45 AM||eBay Motors #9 (permalink)|
Hers the bulletin I was talking about. I found this here on the forum a couple of weeks ago and did mine this past weekend. So far so good. I took a 150 mile trip up into the mountains and no problem. The picture in the bulletin shows the section of hose that goes over the trnsmission. I changed all 4 sections on the fuel suction return line. Why it goes from tube to hose to tube etc...4 time seems unnesessay, but then I'm not an engineer. Change all sections because I found 3 of the 4 bad. The one at the fuel filter was the culprit. Kinked at the area where it bends. Looks like it had been sucking flat pinching off the fuel supply, tripping the code P0093 large fuel leak and dropping it into limp mode. From what I understand the sensor doesn't really know the problem, just that there is a drop in pressure. IE...Maybe a fuel leak? Hope this fixes your problem. At least it a cheap start and a problem that need fixed anyway.
Found a Fix for P0087, P0093 when under a load
My original thread with the full story of the problem was posted a couple weeks ago under "P0087 when under load going up mountains".
I FOUND A FIX FOR THE PROBLEM-COST ME $50 IN PARTS, LESS THAN AN HOUR OF MY OWN TIME, AND $30 FOR A TECHS ANSWER ON Ask Question & Experts Answer You ASAP! Name Your Price, Get Online Answers & Help - Just Answer!!!!!!! GM BULLETIN #PIP4526!!! Go to a GM dealer and ask them to print out this bulletin for you and do the repair. I had to order the hose (special kind) from a distributor of the supplier listed in the bulletin-$6 a foot x 3 ft (more than enough) + shipping, use standard hose clamps from a local autoparts store-2 clamps on each end of the hose.
When my husband got under the truck and looked at the section down by the tranny there were 2 spots in this 1.5 ft area that were soft and collapsed, replaced the section per the bulleting last night, went thru Jellico Mountain today with a camper like usual and the code DIDNT set.
What happens is after the hose gets good and hot (4-6 hrs driving), it softens and then collapses when you put the truck under pressure with a load---this cannot be duplicated in a shop with any testing due to special circumstances---unless someone is gonna hang underneath your truck while you drive down the road and watch to see if it collapses (LOL), which is why no one can figure out this problem. The $50 for the parts is worth the try...worked for us.
If anyone has any questions you can email me at "email@example.com"...I will be more than happy to help. I would like to thank Hal at Eisinger Chevrolet in Columbia Falls, Montana for leading me to this bulletin for the fix!!!
(this bulletin actually has pictures of where the hose sections are located but they wouldnt transfer onto here, so have a GM dealer print it out for you)
#PIP4526: Diesel Engine Fuel Line Repairs - keywords DTC hose kink loss P0087 P0093 P1093 pipe power reduced repair restrict restriction SES suction supply vacuum - (Nov 7, 2008)
Subject: Diesel Engine Fuel Line Repairs
Models: 2001-2007 Chevrolet Silverado Classic
2001-2007 GMC Sierra Classic
2007-2009 Chevrolet Silverado
2007-2009 GMC Sierra
Equipped with the 6.6L Diesel Engine RPO codes LB7 LBZ LLY LMM
The following diagnosis might be helpful if the vehicle exhibits the symptom(s) described in this PI.
A dealer may need to perform a repair on the rubber portion of the fuel supply (suction) lines. The rubber section of the line could become kinked or collapse. Fuel lines that kink or collapse may induce a fuel system restriction (high vacuum gauge readings) or DTCs P0087, P0093, and/or P1093 to set.
If a technician was to suspect the rubber portion of the fuel feed line collapsing or kinking, replacement of only the rubber line is acceptable.
Complete the steps below to repair the rubber section of fuel supply line:
Carefully cut, split, and remove the OEM crimp from both ends of the flexible hose. These crimps can be cut with a small cut-off wheel. Split the crimp into two pieces (use your discretion on first cut location, then cut directly across from, or 180 degrees from first cut). Special care must be taken not to damage the flare on the end of the steel pipe that will be reused.
Remove the OEM crimps and flexible portion of hose from the existing supply line.
If replacing the rubber section of the supply line, a 1/2 ID hose meeting SAE specification 100R3 is suggested. Dealers may be able to find a local supplier for this hose, or can contact the manufacturer Parker Hannifin. The replacement hose would be a 1/2" diameter Parker part number 601-8 or H017-8. To find a local distributor the Parker website can be accessed at Please wait while we redirect...
Use worm type hose clamps (use double clamps on each end) to attach the replacement hose to the existing pipe.
The locations of the flexible hoses are pictured below.
2009 Chevrolet Silverado 2500 HD
LMM, Allison Stock
AMSOIL bypass oil system
|05-23-2011, 09:52 AM||eBay Motors #10 (permalink)|
Does any body have pics of this fix and which hoses to replace? my truck is 9 years old and does not have this problem YET....I am thinking of replacing the line now ...Why wait. What kind of hose do I ask for?