208gt4 power issue | FerrariChat

208gt4 power issue

Discussion in 'Technical Q&A' started by Robert Cooper, Jan 19, 2022.

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  1. Robert Cooper

    Robert Cooper Rookie

    Apr 12, 2019
    5
    Full Name:
    Robert Cooper
    #1 Robert Cooper, Jan 19, 2022
    Hi All, just finished a timing belt and pulley change and new distribution parts. The car is starting easily, runs very smooth at idle and revs well, BUT has no power when driving, need high revs to get the car going but it does manage to get above about 60km/h. Any pointers as to where I should start looking for the problem? Distributer timing, Carbs, cam timing? I could spend hours trying to source the issue, every thing was marked before I started to work on it and it all is back to the same marks. Is there a simple way to diagnose lack of power when the engine starts easily, idles and revs smoothly? Thank in advance...
     
  2. wmuno

    wmuno Formula Junior
    Silver Subscribed

    Dec 24, 2007
    434
    Wilmette, Illinois
    Full Name:
    Bill Muno
    #2 wmuno, Jan 19, 2022
    Two things to look at regarding lack of power at higher RPMs are the distributor advance and the carbs. The distributor advance curve can be checked by a service shop that has an older Sun distributor machine. The carb float levels should be checked as well as an overall inspection and cleaning. Also, make sure all the accelerator pumps are working. Finally, everything depends on the fuel pump being up to specs.
     
  3. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
    Lifetime Rossa

    Jan 11, 2001
    25,123
    30°30'40" N 97°35'41" W (Texas)
    Full Name:
    Steve Magnusson
    #3 Steve Magnusson, Jan 19, 2022
    Yes ;). First things that I would do is: 1) confirm/deny if you have spark on both banks, and 2) (if spark is present on both banks) check the ignition timing of both banks at idle using the flywheel timing marks and confirm they (both) advance when the RPM is increased. Unfortunately, you may need to eventually recheck that the cam timing marks are reasonable.
     
  4. Robert Cooper

    Robert Cooper Rookie

    Apr 12, 2019
    5
    Full Name:
    Robert Cooper
    #4 Robert Cooper, Jan 19, 2022
    Will recheck the basics, Carbs float level, spark on both banks, try and check both banks ignition timing (will need to buy a new ignition timing gun) and advance. Confirm fuel pump is good. I am in mallorca and have limited access to a knowledge base of specialists on island..
     

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