Results 1 to 5 of 5

350 TBI missing, how to interpret ALDL logging results

This is a discussion on 350 TBI missing, how to interpret ALDL logging results within the Technical / Maintenance forums, part of the General Discussion category; I've been having some issues with my '95 on accel and higher load situations (ex. hills), especially in hot weather. ...

  1. #1
    Registered User
    Join Date
    Aug 2010
    Location
    Al
    Posts
    193

    350 TBI missing, how to interpret ALDL logging results


    Support FSC and see no ads! - Click Here
    I've been having some issues with my '95 on accel and higher load situations (ex. hills), especially in hot weather. A lot of the time it will feel like it is missing on 2 or 3 cylinders in a row every few seconds. I finally hooked my homemade ALDL up and did some datalogging with winALDL, but am having trouble interpreting all the parameters in the results file. I get the basics like making sure the TPS, MAP, CTS readings make sense, but what exactly am I looking for to make sure everything is working properly? There are also quite a few knocks tending to center around 1500 RPM and high throttle applications which I think might be the cause of the issue, but I am not sure how to tell what is wrong or how to fix it.

  2. #2
    Registered User
    Join Date
    Dec 2011
    Location
    olivebranch mississippi
    Posts
    42

    Re: 350 TBI missing, how to interpret ALDL logging results

    id replace plugs and wires b4 i did anything else

  3. #3
    GMC RULZZ NEUMANNZZ's Avatar
    Join Date
    Mar 2005
    Location
    San Diego
    Age
    46
    Posts
    17,855

    Re: 350 TBI missing, how to interpret ALDL logging results

    fuel pressure 9-13psi?
    O2 GMC RCSB 4.8L V8 AUTO 3.73's
    rebuilt/beefed up 4L60E(at 43,000miles)
    Matching Ninja 500r


  4. #4
    Registered User
    Join Date
    Mar 2007
    Location
    mi
    Posts
    5,102

    Re: 350 TBI missing, how to interpret ALDL logging results

    Timing at zero with EST wire disconnected. Any codes?
    04 K1500 Silverado EXT 3:73 gears, 5.3L 265/75-16,Pace Edwards tonneau,

  5. #5
    Registered User
    Join Date
    Aug 2010
    Location
    Al
    Posts
    193

    Re: 350 TBI missing, how to interpret ALDL logging results

    I have a new set of plugs ready to go in after I seafoam the truck this weekend. The wires are about 1.5 years old, probably good idea to go ahead and replace the set, are there any brands that are better than the others? My fuel pressure is around 12.5 psi, I have an adjustable FPR and that is as low as it will go. The timing is set to 0° with the connector off, but I am wondering now if I am using the right reference mark. Is the screwdriver in cylinder 1 plug hole trick the best/easiest way to verify timing?

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
     BMW - Cadillac - Camaro - Corvette - Mercedes - Mustang - F150 - Ferrari - Lamborghini - Porsche - Ranger