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hot start problem

Discussion in 'EFI Tuning Questions and Engine Management' started by mikeg, Aug 19, 2013.

  1. mikeg

    Joined:
    Apr 6, 2013
    I need some help. I have tried everything i can think of. I have a 95must gt with r331 /tea205 heads/ track heat intake/ fcam/ a1000 fuel system/ pih running a9l computer/ 50lb injectors with blow tru pro-m protube/ msd 6al with btm/ 76mm master power turbo. when cold car starts easily and runs great. once up to operating temp the car continues to run great however when turned off it will not restart. I turns over easily. It just does not start. It has fuel pressure and fire at the coil and wires. I have changed distributor/ coil/ and bypassed msd with no change in problem. After car sits for approx 30minutes it starts like normal. Any ideas would be greatly appreciated.
     
    mikeg, Aug 19, 2013
    #1

  2. Matt Cramer

    Joined:
    Sep 29, 2006
    Do you have any ability to get into the A9L's tune and change its hot start settings?
     
    Matt Cramer, Aug 20, 2013
    #2

  3. mikeg

    Joined:
    Apr 6, 2013
    I don't have any way to adjust. It had been working fine. Just started the other day
     
    mikeg, Aug 21, 2013
    #3

  4. Matt Cramer

    Joined:
    Sep 29, 2006
    Any issues with the coolant or air temperature sensors?
     
    Matt Cramer, Aug 21, 2013
    #4

  5. Drac0nic

    Joined:
    Feb 28, 2005
    Can you get feedback from the ECU? I'm wondering if you see it cranking at all. If you have someone crank when hot do the injectors cycle at all? Stick your hand on them if they're accessible you should feel them pulsing. Count your fingers when you're done.
     
    Drac0nic, Aug 21, 2013
    #5

  6. mikeg

    Joined:
    Apr 6, 2013
    i can't check the injectors. i believe the distributor signals the ecm to fire injectors and I've tried a different distributor with no change. i want to get a ms pnp for car but i want to get this issue fixed first as i do not think it is something i can tune out. i have ran this car like this for years and this just started. something has to be wrong somewhere. it also has a new temp sensor.
     
    mikeg, Aug 23, 2013
    #6

  7. madspeed

    Joined:
    Oct 23, 2012
    noid light wont work for injector test or you havent tried?
     
    madspeed, Aug 23, 2013
    #7

  8. mikeg

    Joined:
    Apr 6, 2013
    fails noid test hot. what can cause that? i've changed everything i can think of. computer, distributor, tfi
     
    mikeg, Aug 23, 2013
    #8

  9. mikeg

    Joined:
    Apr 6, 2013
    changed tps to fix problem
     
    mikeg, Aug 24, 2013
    #9

  10. PrecisionTurboMustang

    Joined:
    Jan 27, 2006
    Thanks for updating.
     
    PrecisionTurboMustang, Aug 24, 2013
    #10

  11. Disney Lincoln

    Joined:
    Feb 14, 2003
    I'm kinda surprised you don't have more of a hot start issue with those 50# and stock ECU and no tuner. I would generally have to trim startup fuel by about 60% to start a 50# with any repeatability.
     
    Disney Lincoln, Aug 26, 2013
    #11

  12. furchaser

    Joined:
    Sep 15, 2007
    You guys are way to smart , I would have figured a leaky fpr that was bleeding back into vacuum line filling it full of fuel until pressure blead down.. nice work.
     
    furchaser, Aug 26, 2013
    #12

  13. Drac0nic

    Joined:
    Feb 28, 2005
    Seen that, my personal fav is actually the classic "vacuum modulator leak."
     
    Drac0nic, Aug 26, 2013
    #13

  14. mikeg

    Joined:
    Apr 6, 2013
    just ordered mspnp gen2. woohoo
     
    mikeg, Aug 29, 2013
    #14
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