Results 1 to 5 of 5

Thread: Hunting at idle

  1. 14th October 2018, 03:50 PM #1
    Fourgearsticks's Avatar
    Fourgearsticks
    Fourgearsticks is offline Master
    Join Date
    Jan 1970
    Location
    South by Southwest. Vic, Strayliya
    Posts
    263
    Total Downloaded
    0

    Hunting at idle

    3.5 V8 Jan 91 model. Been having trouble with excessive fuel consumption, engine hunting and stalling at idle. Did some searching and found a thread that recommended check coolant temp sensor and resisitance on MAF. Coolant sensor was at 280 ohms and MAF was at 425. The guide was for MAF resistence to be 40 I think, I can't find the thead again.
    I adjusted the MAF back to 100 and it seems to run a lot smoother. Can anybody tell me what a target figure would be for MAF resistence? 40 seems a long way back from 425
    Reply With Quote Reply With Quote
  2. 14th October 2018, 04:45 PM #2
    LRJim's Avatar
    LRJim
    LRJim is offline Wizard
    Join Date
    Jun 2018
    Location
    Redesdale
    Posts
    1,524
    Total Downloaded
    0
    Check the MAF for volts on the 2 outside wires, should be around 1v if not dial it down there's a screw hole on top. I've been experimenting with the MAF a little as I can't find an exact figure I keep getting crossed messages. I was at 1.35 but dialed it down to 1v this morn and drove for for 3 hours without an issue. Noticed a bit better fuel consumption at 100ks with headwind and a.c today also. Mines a 3.9 stepper no o2 sensors but should be the same for you with the 3.5. Also check your TPS and adjust base idle if needed too. I adjusted my TPS and it made a world of difference.
    Cheers Jim
    Reply With Quote Reply With Quote
  3. 14th October 2018, 05:28 PM #3
    Fourgearsticks's Avatar
    Fourgearsticks
    Fourgearsticks is offline Master
    Join Date
    Jan 1970
    Location
    South by Southwest. Vic, Strayliya
    Posts
    263
    Total Downloaded
    0
    Thanks Jim, have you seen the figure quoted as resistence in ohms? Took it for a drive into town this afternoon, no hunting at idle, a lot smoother, seems to have more power. Will be interesting to see how K's/L goes.
    Reply With Quote Reply With Quote
  4. 16th October 2018, 07:34 AM #4
    DAMINK Guest
    Quote Originally Posted by LRJim View Post
    I've been experimenting with the MAF a little as I can't find an exact figure I keep getting crossed messages.
    A reference i often go back to is this website Lucas 14CUX Fuel Injection System – Installation and Diagnostic Notes. - ACT Performance Products - your source for after market TVR upgrades, components and performance accessories.

    It has all the values needed to tune the 14CUX.

    1.4 is the number i aim for when setting the maf.
    Reply With Quote Reply With Quote
  5. 17th October 2018, 08:20 AM #5
    Fourgearsticks's Avatar
    Fourgearsticks
    Fourgearsticks is offline Master
    Join Date
    Jan 1970
    Location
    South by Southwest. Vic, Strayliya
    Posts
    263
    Total Downloaded
    0
    Thanks Damink I will recheck it with the meter on volts instead of resistance. Disco is running very well now no sign of hunting and seems more power and smoother.
    Reply With Quote Reply With Quote
« The long to do list. My D1 V8 | D1 dash handle to airbag swap? »

Tags for this Thread

Bookmarks

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
  •  

Forum Rules

Search AULRO.com ONLY!
 Search All the Web!