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308 not starting

Discussion in '308/328' started by Duncan Cory, Oct 20, 2020.

  1. Duncan Cory

    Duncan Cory Rookie

    Sep 13, 2019
    4
    Full Name:
    Duncan Cory
    I own a 1980 308gtsi when I go to start it it cranks fine but wont fire up untill I turn the key back in the run possition and then dies right away, if I do this several times I can get it to start any ideas?????
     
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  3. Brian Harper

    Brian Harper F1 Rookie
    Owner

    Feb 17, 2006
    3,780
    San Jose area
    Full Name:
    Brian Harper
    I'd put a DVM (or test light) on the coil + terminal and look at voltage through the phases of the key rotation. It should be 12V unless the car is off.
     
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  4. Continental AutoSports

    Sponsor

    Aug 22, 2006
    3,364
    Hinsdale, IL
    Full Name:
    Jeremy Sus / Parts Department
    Bumping this thread for the op, any help would be appreciated.
     
  5. mike32

    mike32 F1 Rookie

    May 13, 2016
    3,021
    Uk
    Assuming same fuse box as 87 mondial, try the 3 relays on the far right of the fusebox. Top, middle and bottom row. Check the bosch pt no as 2 the same and 1 different. These control the start, plus others.
     
  6. Imatk

    Imatk Karting

    May 6, 2007
    101
    Might be crazy, but it might be your ignition switch.

    I'd do a quick test... find your start wires and run wires and just put them together. I had an issue like this with a ignition switch before that had worn out.
     
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  8. Brian Harper

    Brian Harper F1 Rookie
    Owner

    Feb 17, 2006
    3,780
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    Brian Harper
    Do I need to lend him a voltmeter also?
     
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  9. RamsHmb

    RamsHmb Formula Junior
    Rossa Subscribed

    Jan 22, 2017
    374
    California
    Any fuel smell? Literally bought an 83 two weeks ago and the fuel accumulator went bad on transit. Somewhat different symptoms but similar enough. Fixed now and running like a champ
     
  10. derekw

    derekw Formula 3

    Sep 7, 2010
    1,205
    London, UK
    Full Name:
    Derek W
    Your first reply was good advice. Test the coil voltage at different key positions and if no 12VDC in start position then check the relays or switch as already suggested. Report back as a courtesy :)
     
  11. mike32

    mike32 F1 Rookie

    May 13, 2016
    3,021
    Uk
    Sounds like relay V is not staying in. Bottom right in the fuse board
     
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  13. mike32

    mike32 F1 Rookie

    May 13, 2016
    3,021
    Uk
    Assuming same as mondial, there should be a red, white and yellow stripped black wire. Red is permanent supply to key switch, yellow stripped black becomes live in pos 1 and supplies other items, white becomes live when key turned to start( power supply to starter solenoid)
     
  14. Miklas

    Miklas Rookie

    Dec 10, 2018
    36
    Luxembourg
    Wasn't there someone on here that had a similar issue a while ago? In that case the two wires at the ignition switch were swapped and that solved the problem if I recall correctly. You might want to do a search for it.
     
  15. Duncan Cory

    Duncan Cory Rookie

    Sep 13, 2019
    4
    Full Name:
    Duncan Cory
    thanks for reply Im getting power out of the switch at the right times Im thinking it may involve the fuel system Im also getting a back firing I didnt have before tried new plugs went to 7nycs. Also would you know where I can get a copy of the shop book or even which book or books I need to cover my 1980 gtsi ?????
     
  16. mike32

    mike32 F1 Rookie

    May 13, 2016
    3,021
    Uk
    Break the fuel line by the pump and rig up a pipe into a container to see if the pump is working first. I take it the plugs are sparking when hung out.
    There is a thread on here about the fuel pump safety switch, look at it down the index page under Fuel pump question
     
  17. Imatk

    Imatk Karting

    May 6, 2007
    101
    If you're having backfiring I'm wondering if the ecu has started to fail. I've had similar issues before with other cars and it was the ecu that was the culprit.
     
  18. Steve Magnusson

    Steve Magnusson F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    19,498
    Texas
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    Steve Magnusson
    #15 Steve Magnusson, Nov 25, 2020 at 6:39 PM
    Last edited: Nov 25, 2020 at 6:55 PM
    There is no "shop book" specifically for 308GTBi/Si (2-valve). What's available to you to blend together is:

    1. The 308GT4 WSM -- this will cover much of the suspension, brakes, etc. -- available at Carl Rose's website: https://ferrari.cdyn.com

    2. The Mondial8/MondialQV 281/83 WSM -- this has the 3.0L-V8 (2-valve) Digiplex ignition system information and Bosch CIS information for K-Jet without Lambda (as used on US version and euro version) -- also available at Carl's website (along with other useful stuff).

    3. The 308GTBi/Si Spare Parts Catalogue -- I can't recall the US version SPC being available on-line, but the euro version SPC is what is shown at the parts vendors who still have on-line SPCs available -- for example, www.eurospares.co.uk or www.ferrariparts.co.uk

    (If someone has a 1980-82 US version 308GTBi/Si SPC in pdf form, please let me know.)

    4. The OM for your exact year/version -- this has the wiring diagram, and, for the US version, a lot of good technical figures and descriptions of the specialized US emission equipment. This is also the best reference for the technical specifications (valve clearances, ignition map, etc.).
     
  19. Steve Magnusson

    Steve Magnusson F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    19,498
    Texas
    Full Name:
    Steve Magnusson
    Didn't get this edited in time, but Carl also has the 1981-82 US version Mondial SPC 214/81 available which uses the same US emission components on the engine.
     
  20. Casino Square

    Casino Square Formula 3
    Rossa Subscribed

    Apr 21, 2004
    1,689
    Hong Kong / USA
    Full Name:
    Andrew
    Had a related problem a couple of years ago. The car would be difficult to start....would get going and then stop after a few seconds. Found it was an old fuel line that was "collapsing" under the venturi flow of the fuel through it. New fuel lines throughout...no problems!
     
  21. Neonzapper

    Neonzapper F1 Rookie

    Oct 19, 2008
    2,531
    MD/FL/Philippines
    Full Name:
    Mykol
    Check your FUEL ACCUMULATOR
     

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