Results 1 to 6 of 6

Thread: Need help with a few codes.

Hybrid View

Previous Post Previous Post   Next Post Next Post
  1. #1
    Junior Member
    Join Date
    May 2007
    Posts
    28

    Default Need help with a few codes.

    Still trying to tune my ls6 conversion and still getting a few codes.
    p0171
    p0174
    p0327
    p0322
    Ok, history on the car. It's an 02 ls1 vette that I just dropped a 04 ls6 longblock in including electronics etc.
    Battled a p0300 and found that I was getting 48lbs of fuel pressure. Swapped out the fuel filter (PITA) and violla 58 to 62 lbs so p0300 is gone. I have replaced both o2's and both knock sensors twice. Still same thing. My wideband shows me at 11.9 afr at cruise and 12.1 12.4 at throttle.
    I was getting max kr all the time at anything over 40% tps but, that was due to me placing silocone all around the kr sensor (per tech pub) and running straight exhaust with solid motor mounts. Removed rtv sealant and replaced kr sensors and knock is gone.
    I have a pvc catch can in place and a breather cap on my oil filler. Would this cause a vaccum leak? I wouldn't think so but, I have gone over this car 100 times and can find NO vaccum leak. My boost guage shows 25 to 30 lbs of vaccum at idle (planning to s/c once mystry codes are gone).
    Any ideas?
    Tune is still a stock 04 zo6 tune less the ethnol tables and the tranny. I have an a4 not an m6.
    Thanks,
    -Chris

  2. #2
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    http://www.ls2.com/forums/showthread...hreadid=178439

    Are you getting P0322 or P0332...?

    I have a pvc catch can in place and a breather cap on my oil filler. Would this cause a vaccum leak?
    So it sucking air thru the breater cap into the crankcase, out to the PCV/catchcan and into the intake manifold (just past the throttle blade)... that is an air leak; are you running with a MAF sensor...?

  3. #3
    Junior Member
    Join Date
    May 2007
    Posts
    28

    Default

    Thanks for the response.
    Yes, it is p0332 not p0322
    I have the gm sp software and have done all the tests. No short to ground and I do register KR with grounding the unit and tapping.
    I am running a Maf sensor.
    Just wondering if I need to close up the crankcase or just increase IPW like others have suggested in other threads?
    Keep the ideas coming.
    Thanks,
    -Chris

  4. #4
    Joe (Moderator) joecar's Avatar
    Join Date
    Apr 2003
    Posts
    28,403

    Default

    MAF is not measuring air entering thru breather on filler, so something has to be done (more air is entering than is being measured).

    You may need to measure your actual AFR using a wideband...

    Knock can be caused by:
    actual AFR is lean (air leak(s));
    ignition advance is too much;
    engine is running too hot;
    intake air is too hot;
    MAF sensor is dirty;
    carbon deposits in combustion chamber (run a good dose of SeaFoam or GM TEC);
    oil being sucked into intake (you have a catchcan, but check behind throttle blade anyway);
    wrong or worn spark plugs;
    wrong gas;
    other...

    -> Can you hear it knock...?
    -> When does it knock (MAP, RPM...?)...?

    Knock sensors and/or their subharness may be faulty;
    Knock sensors may also pick up other noise (valvetrain, piston slap, bearings...).

  5. #5
    Junior Member
    Join Date
    May 2007
    Posts
    28

    Default

    Nope, can't hear any kr and remember I have resolved all the kr issues.
    Keep in mind that this block is new and approx 40 miles on it.
    Now, I did not purchase a z06 maf as they were 150$. Instead I got a brand new ls1 maf but, I put in the stock ls1 maf table.
    I do have a vararam intake with a KN. I will check the maf (clean) for possible oil on the element.
    My Afr is reading on the lc1 11.9 to 12.4 afr so I suspect a leak somewhere or a computer issue. I will drive the car with the engine sealed up after I clean the maf and report back.
    Thanks for your help joecar I do appreciate it
    -Chris

  6. #6
    Junior Member
    Join Date
    May 2007
    Posts
    28

    Default

    well, that is weird as he$$.
    Sealed the case and all codes went away. How in the world do the s/c guys run a breather filter?

Similar Threads

  1. Dtc 040 & 041 ?? EGR codes...
    By Nor-Cal Nick in forum Duramax 06 LLY / 06+ LBZ & LMM
    Replies: 14
    Last Post: October 12th, 2014, 12:21 PM
  2. E38 & Codes
    By eboggs_jkvl in forum E37, E38 & E67 PFI ECM's
    Replies: 6
    Last Post: March 31st, 2009, 03:07 AM
  3. Error Codes
    By Chevy366 in forum FlashScan V2
    Replies: 0
    Last Post: November 28th, 2007, 03:22 AM
  4. abs codes
    By slimdad920 in forum General
    Replies: 5
    Last Post: July 9th, 2006, 12:34 PM
  5. o2 codes
    By johnv in forum General (Petrol, Gas, Ethanol)
    Replies: 11
    Last Post: June 5th, 2005, 06:20 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •