Results 1 to 4 of 4

Need Help!! Fuel/air Issue!

This is a discussion on Need Help!! Fuel/air Issue! within the General Help forums, part of the LSx Technical Help Section category; I have an 85 Iroc and I recently switched it back to TPI like it is suppose to be, but ...

  1. #1
    Junior Member
    Join Date
    Oct 2006
    Location
    Central Ohio
    Age
    29
    Posts
    41

    Black
    1985 Iroc-Z

    Question Need Help!! Fuel/air Issue!

    I have an 85 Iroc and I recently switched it back to TPI like it is suppose to be, but in the process I had my throttle body ported to 52mm and I upped the injectors to 24 lb/hr and they were stock 19 lb/hr. It runs and drives but it is running extremely rich and if it sits at idle for more than 30 seconds or so it becomes very chopy and I get a "lean exhaust" code. Code 44 I believe. It also becomes choppy on full throttle. Any ideas what is going on or what else I may have to upgrade to fix the problem?? Thanks for the help!

  2. #2
    Senior Member Orcus79's Avatar
    Join Date
    Feb 2006
    Location
    Canada
    Age
    38
    Posts
    1,346

    black
    2002 WS6

    yea, the computer still sees the 19lb/hr injectors and is running them as such would be my best guess. running rich but getting a lean exhaust code though sounds like an 02 faliure possibly. Also check the EGR but I doubt you would still be running it.

    Could also be a MAP error as well.

  3. #3
    Junior Member
    Join Date
    Oct 2006
    Location
    Central Ohio
    Age
    29
    Posts
    41

    Black
    1985 Iroc-Z

    How would I solve the computer issue? If it is reading as 19 still, how do I get it to read 24? Thanks.

  4. #4
    Senior Member Orcus79's Avatar
    Join Date
    Feb 2006
    Location
    Canada
    Age
    38
    Posts
    1,346

    black
    2002 WS6

    That I do not know, its all in the fuel curves. Sadly those computers are not easily flashed unlike the OBDII systems. As far as I amware you need to get a the driver chip replaced. I would do more digging though as to why you are running rich but the code says lean.

    Pull your plugs and see what they say. It might be as simple as a a plug not firing. Elinate the basics before anything else.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Help: fuel pump issue
    By Fastdak in forum General Help
    Replies: 4
    Last Post: 05-22-2016, 03:55 AM
  2. Fuel Pump Issue??
    By scStormChaser in forum General Help
    Replies: 10
    Last Post: 04-23-2015, 11:30 AM
  3. LT1 to LS2 Fuel Issue
    By MaxPlusTen in forum General Help
    Replies: 0
    Last Post: 03-10-2010, 05:25 PM
  4. Odd fuel issue...
    By kdick91 in forum General Help
    Replies: 5
    Last Post: 09-25-2009, 12:05 AM
  5. Transmission or Fuel issue?
    By jamessr in forum General Help
    Replies: 3
    Last Post: 09-02-2007, 04:26 PM

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
  •