diagnosing an engine start-up problem from

Discussion in 'The Garage' started by tomustang, Jan 30, 2007.

  1. tomustang

    tomustang New Member

    Messages:
    46
    Likes Received:
    0
    Joined:
    Jan 15, 2006
    a thousand miles away...? :khobra:

    Yeah so my dad was driving around in my cobra and it died on him, since then he had the starter replaced and the car tried to start but won't turn over, he has tried the enerta switch and and still no go. There is a new battery and altenator in it, the battery is charged and good.

    The shop he sent it too has no idea BUT they never deal with mustangs so I'm guessing it's one of the Coilpacks, anyone else give me a clue before I ship myself back to fix my car :dunno:
     
  2. 97blackgt

    97blackgt Well-Known Member

    Messages:
    1,064
    Likes Received:
    0
    Joined:
    Dec 8, 2006
    not really enough info..? start with the basics..if it quit while he was driving, check for fuel pressure? If it has fuel pressure check spark?
     
  3. MeanGrn Gt

    MeanGrn Gt Well-Known Member

    Messages:
    3,094
    Likes Received:
    0
    Joined:
    May 29, 2006
    can he hear the fuel pump turn on or anything?
     
  4. uncltrvlnmatt

    uncltrvlnmatt Legend

    Messages:
    14,939
    Likes Received:
    28
    Joined:
    Apr 8, 2006
    Location:
    Pa.
    If it is cranking but won't start I would go, or is trying to start. I would start by replaceing the fuel filter if it has not been done recently. Make sure it has good fuel presure. Also make sure the engine was not flooded. I know it is fuel injected but it can happen. My wife flooded my car. She gave it fuel while trying to start it and flooded it. I had to pull the plugs and clean them.
     
  5. tomustang

    tomustang New Member

    Messages:
    46
    Likes Received:
    0
    Joined:
    Jan 15, 2006
    Fuel system - good idea

    Fuel Filter - ill have to get a flare tool to get that off, good thinking, didn't think about that one

    Spark is fine, all new wires and plugs, only thing that is old is the coilpacks


    this is challanging for me since i do not have any other info than what my non-mechanical parents tell me about it :-[
     
  6. 97blackgt

    97blackgt Well-Known Member

    Messages:
    1,064
    Likes Received:
    0
    Joined:
    Dec 8, 2006
    use a fuel pressure gauge to check pressure..should be (key on engine off) 37-43 PSI. If u have fuel pressure check spark with a 5$ spark tester. If it is getting spark and all the plugs look good, check compression...My guess would be the fuel pump went bad
     
  7. 95SVTCobraVA

    95SVTCobraVA New Member

    Messages:
    13
    Likes Received:
    0
    Joined:
    Jan 14, 2007
    There is another possibility. I have a 5.0 Cobra and I had a problem similar to this. It cost me a bunch of money to chase it down.

    If you are getting spark while cranking then it is a good possibility that it is a fuel pump.

    If you are not getting spark then it may be your coil packs OR your crank sensor.

    The solution for my Cobra was that I had to replace the stator sensor in my distributor. For the 4.6 I believe you have a crank sensor.

    Something to keep in mind.
     
  8. tomustang

    tomustang New Member

    Messages:
    46
    Likes Received:
    0
    Joined:
    Jan 15, 2006
    Last thing on my mind is if it has to deal with being in the fuel tank :-[
     
  9. 95SVTCobraVA

    95SVTCobraVA New Member

    Messages:
    13
    Likes Received:
    0
    Joined:
    Jan 14, 2007
    I know what ya mean ;)