How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask Hal Your Own Question

Hal
Hal, Chevy Master Tech
Category: Chevy
Satisfied Customers: 1020
Experience:  ASE and Chevy Master , 31yr Dealership exp,
39646262
Type Your Chevy Question Here...
Hal is online now
A new question is answered every 9 seconds

6.6duramax p0087 p1093 p1094 lack of power hard accel some

Customer Question

6.6duramax p0087 p1093 p1094 lack of power hard accel some black smoke
Submitted: 4 years ago.
Category: Chevy
Expert:  Paul M ASE Master replied 4 years ago.

Hello and thank you for using Just Answer

 

there is a common problems with the fuel injectors causing these codes and lack of power

 

there is a TSB from Chevy on changing out the injectors

 

click here to view this TSB

 

I would contact Chevy and see what they can do for you on this

 

let me know if you need more help

 

thanks


Paul

Customer: replied 4 years ago.
had 8 new inj installed 3 mons ago had a ford 7.3 did same thing turned out to be supply pump
Expert:  Paul M ASE Master replied 4 years ago.

I will open the question to see if any other experts have an idea for you

 

thanks

 

Paul

Expert:  Hal replied 4 years ago.

Hi my name isXXXXX

I under stand from your post that you have already had the injectors replaced, and now are still setting codes that are similar to injector failure codes. correct?

You also mentioned that the fuel filter is hard to get primed.

Does it just feel soft all the time , or when you try to pump it , it sticks down and doesn't return to full up position?

 

 

Customer: replied 4 years ago.
does feels soft sometimes does not stick truck runs ok till i acell full throttle then it noses over
Expert:  Hal replied 4 years ago.

The suction side of the fuel system can cause this if a hose is pinched/kinked. The same exact trouble codes will set because the pump cannot get fuel PIP 4526 bulletin explains this from GM . Check all the rubber lines( cut off the outer foam cover to inspect) .

The most likely one to kink is the hose from the fuel injection control module to the fuel filter inlet on rt side of engine. Check all rubber lines, from tank to engine.

I have seen the pumps do this also, but not have the (hard to prime fuel filter ) concern.

If you can have someone hook up a bidirectional scan tool where they can control fuel pressure. Have them ramp up the pressure to 160 MPA ( 2250 psi )If it reaches this pressure then the pump is not your problem.

Injector replacement is a major job, and things sometimes don't get put back in the correct place. I would concentrate on the rubber lines on top of the engine.

I also assume since you are having a hard time priming the filter that you have already installed a new filter.

Verify there are NO air leaks at the filter housing to. This sounds more like a restriction than an air leak though.

 

If you need more info, PLEASE ask and i will help.

Tanks HAL

Customer: replied 4 years ago.
had tech run fuel del presure test says fuel pressure des with scan tool should be 2500 only 1200/1300 like i said runs but acts likes starving for fuel sorry i didnt get back too you yesterday
Expert:  Hal replied 4 years ago.

Did he also check the low pressure side with vacuum gauge? You have to cut open the foam cover over the supply hose to fuel filter to see the rubber hose.

If all the hoses are good. and suction side vacuum is 3 1/2 ". and the injectors have already been replaced, then all thats left is the pump.

A return rate test should be performed just to make sure the new injectors are not returning too much fuel ,resulting in a low fuel pressure reading. 16 ml per bank Max.35-38 API specific gravity 20 ml max 39-42 Ap specific gravity. If that is good then it is definitely the pump.

Fuel filter vacuum should be 3 1/2 "- 4 1/2 " max at idle ,If it is higher then the problem is in your supply side . Fix that first, then recheck the high pressure side max fuel pressure. has to reach 160 MPA. If it can't get the fuel volume to the pump the pump can't build the pressure.(like sucking air, pump cavitates)

Customer: replied 4 years ago.
if fuel inj pump is the problem im going to have to wait dont have 2200.00 to fix it thks for your help
Expert:  Hal replied 4 years ago.
Wow thats allot for a pump replace. Pump should run about $1000. and labor 450-600 depending on labor rate 5.@ hrs for installation. O, forgot about sales tax. We don't have sales tax here in Montana.
Hal, Chevy Master Tech
Category: Chevy
Satisfied Customers: 1020
Experience: ASE and Chevy Master , 31yr Dealership exp,
Hal and 4 other Chevy Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
< Last | Next >
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
< Last | Next >
  • http://ww2.justanswer.com/uploads/TI/tim37857/2011-10-28_23053_S6301814.64x64.JPG Tim's Auto Repair's Avatar

    Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
  • http://ww2.justanswer.com/uploads/DT/dt69nova/2012-6-15_234154_pic1.64x64.jpg Dave Nova's Avatar

    Dave Nova

    Chevrolet Technician

    Satisfied Customers:

    6870
    ASE Master Certification. GM World Class Certification
  • http://ww2.justanswer.com/uploads/ggrote1/2009-06-27_031011_me.jpg Gary's Avatar

    Gary

    Chevy Technician

    Satisfied Customers:

    5404
    15 years GM master tech
  • http://ww2.justanswer.com/uploads/testedtuff/2009-09-26_170108_pictures.jpg John's Avatar

    John

    Master A.S.E Automotive technician

    Satisfied Customers:

    4071
    A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
  • http://ww2.justanswer.com/uploads/RO/rodcuda/2011-7-25_224114_Donhoff1.64x64.JPG Neal's Avatar

    Neal

    Chevy Mechanic

    Satisfied Customers:

    2306
    Shop Owner and Mechanic on multiple makes.
  • http://ww2.justanswer.com/uploads/goodwrench9124/2008-11-09_220838_dscf0007.jpg goodwrench9124's Avatar

    goodwrench9124

    ASE Certified Technician

    Satisfied Customers:

    2041
    Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer, Hybrid certified
  • http://ww2.justanswer.com/uploads/DR/drivefast1971/2012-1-12_172422_0009051tQKh.64x64.jpg Ron Z.'s Avatar

    Ron Z.

    - Chevy Tech -

    Satisfied Customers:

    1912
    18+yrs experience. State Inspector and Chevy Diagnostics
 
 
 
Chat Now With A Chevy Mechanic
Hal
Hal
Chevy Mechanic
1020 Satisfied Customers
ASE and Chevy Master , 31yr Dealership exp,