Bringing TBI and Multi Port Fuel Injection to a New Level.     EFI Conversions and Tuning! Seattle to Portland! E-mail Tuning Consultant!
Results 1 to 8 of 8

Thread: LS1 Miata

Hybrid View

  1. #1
    Carb and Points!
    Join Date
    Jul 2018
    Posts
    5

    LS1 Miata

    Hello. My LS1 Miata is a bit sick lately and I'm trying to figure out what's wrong. Its been running for 8 years without an issue, but recently the MAF sensor wires cam in contact with the power steering belt and threw a code. It was running with the wires repaired and quit after I cleared the code and hasn't started since. It briefly starts and fires for about a second and quits like the VAT. VAT is disabled and there are no codes to give a clue.

  2. #2
    Administrator
    Join Date
    May 2011
    Location
    Lakes Region, NH
    Age
    49
    Posts
    2,897
    Hello,

    Are any of the MAF wires common to any of the other sensors as well? Are you able to scan the pcm for data? Maybe another sensor isn't providing a signal?

  3. #3
    Electronic Ignition!
    Join Date
    Nov 2017
    Posts
    19
    Replace the MAF, it got smacked.

  4. #4
    Carb and Points!
    Join Date
    Jul 2018
    Posts
    5
    I have one order. It will be a week before it arrives

  5. #5
    Carb and Points!
    Join Date
    Jul 2018
    Posts
    5
    not that I know of. A standard LS1/12200411 wiring harness. No codes and its not running so realtime data. It was running at the time I cleared the codes, it coughed backfired then stalled and hasn't started since
    Last edited by lcreech; 07-09-2018 at 06:06 PM.

  6. #6
    Electronic Ignition!
    Join Date
    Nov 2017
    Posts
    19
    If you are sure the wiring has been fixed, unplug the MAF so it set's the MAF code and then it will be running on SD which is why it ran till you cleared the code. Again, if wiring is good and you have 12v going to the MAF(I want to say the MAF has a fuse), that is an easy test.

  7. #7
    Carb and Points!
    Join Date
    Jul 2018
    Posts
    5
    I got it working. I replaced the MAF, that didn't work. I turned out to be the tune. I had had a shop some years ago dyno'd it and put a custom tune on it. That tune now appears to be broken. I put my original one back in from when I built it and it fired right up.

  8. #8
    Carb and Points!
    Join Date
    Jul 2018
    Posts
    5
    Although it was running, it was still throwing a P0102 code and a couple of heated O2 sensor codes. Found the cause to be a blown fuse. It had no 12 volts going to the MAF.

Similar Threads

  1. My twin supercharged tbi 350 miata build
    By Shawn1989 in forum GM EFI Systems
    Replies: 70
    Last Post: 10-03-2017, 01:19 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
  •