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308 missing saga continues

Discussion in 'Technical Q&A' started by RedF355, Aug 12, 2009.

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  1. RedF355

    RedF355 Karting

    Mar 1, 2004
    56
    Seymour, Indiana
    Full Name:
    Todd
    #1 RedF355, Aug 12, 2009
    ok. My 308 now runs, sorta. thanks for all the help. My issue now is that it just has a miss on 2 cylinders, appearing to be 1 & 4 on the back bank towards the rear of the car.

    at about 4500 rpm it cleans up and comes out of the miss state, or appears to. I have ohmed the TDC sensors, both equal about 765 ohms. just for fun the rpm one ohms at 865.

    I have new cap, new rotors, new plugs, new extenders. Tried two different brands of plugs, presently has bosh supers, though the NGK's did the same results.

    cam timing off? Is there a timing mark set someone can share to proof this? Car was bought not running.

    compression was between 175 & 180 on each of the cyl.

    has slight miss at idle too, at least compared to my other f-cars.

    ready to throw it out the window....
     
  2. fastradio

    fastradio F1 Rookie
    BANNED Professional Ferrari Technician

    Apr 26, 2006
    3,664
    New England
    Full Name:
    David Feinberg
    #2 fastradio, Aug 12, 2009
    And the state of the ignition and coil wires are?????
     
  3. bowbells

    bowbells Formula Junior

    Jan 14, 2008
    353
    Guernsey
    Full Name:
    Arthur Dent
    #3 bowbells, Aug 13, 2009
    you might try calling brian up at Autocar Sports, they aren't too far away from you.
     
  4. brian.s

    brian.s F1 Rookie
    Professional Ferrari Technician

    Nov 3, 2003
    3,809
    Midwest
    Full Name:
    Brian
    #4 brian.s, Aug 13, 2009
    Back to basics:

    Check the wires and extenders and while you are at it, make sure that #1 and #4 ARE correct, I would certainly look at that in my analysis.

    although, because I don't have a history on this car, my diagnostic would start with a mechanical check, cam timing, cylinder leakage. Visual of wiring, plugs, caps, rotors etc.

    We can internet diagnose but you will spend many hours (sounds as though you already have!) chasing things down. just my $0.02.

    Brian
    www.eurocardoc.com
     
  5. Sunracer

    Sunracer Formula Junior

    May 18, 2005
    661
    Makati City
    Full Name:
    Pierre Beniston
    #5 Sunracer, Aug 13, 2009
    idle jets blocked?
     
  6. Sean F.

    Sean F. F1 Rookie

    Feb 4, 2003
    3,066
    Kansas
    Full Name:
    Sean F
    #6 Sean F., Aug 13, 2009
    THIS. You've replaced everything but the cheapest parts.
     
  7. RedF355

    RedF355 Karting

    Mar 1, 2004
    56
    Seymour, Indiana
    Full Name:
    Todd
    #7 RedF355, Aug 13, 2009
    I have replaced the plugs, wires, extenders, caps, rotors.... rutledge was kind enough to overnight most of it on separate days....

    fuel injector plugged up?? It seems that i have strong spark now... just not makingmuch power.... i have another 308 to compare. also still has miss up until around 4k rpms... ait flutters and seems to come out of it around 3 to 4k...
     
  8. bowbells

    bowbells Formula Junior

    Jan 14, 2008
    353
    Guernsey
    Full Name:
    Arthur Dent
    #8 bowbells, Aug 18, 2009
    ever fix this?
     
  9. Tokyo Drftr

    Tokyo Drftr Formula 3

    Jan 18, 2009
    2,461
    UA-USA-JP
    Full Name:
    Ро&#1081
    #9 Tokyo Drftr, Aug 18, 2009
    I had this problem on one of my 308s. Originally my miss was due to a little oil down in the spark plugs causing arcing. Another time on the same car, i decided to remove the fast idle circuit completely as was done on my other 308 (by a dealer) and in the process disconnected the wires to the thermal sw. in the coolant tank. Ran like ****e. But it was so bad it wouldn't even drive. So i simply reconnected the wires at the tank and it was fine. It did not make much sense as my other 308 the wires were not connected.
     
  10. 308GTS

    308GTS Formula 3

    Dec 27, 2001
    2,223
    TN
    #10 308GTS, Aug 18, 2009
    I had a miss that took a while to find and it was bad plug wires. They were Cavis and only 2 years old or so. I replaced with Dave Helms wires and solved my problem. I also went through my caps, rotors, extenders, and replaced the plugs.
     

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