carburetor issue i think

Discussion in 'Technical' started by 1970Ford, May 19, 2012.

Page 1 of 2
  1. 1970Ford

    1970Ford Member

    Joined:
    May 19, 2012
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oklahoma
    Vehicle:
    1970 Ford Maverick 2 door 3.3L - L6
    Hey everyone! I need some help, I have a 1970 ford Maverick i have the original inline 6cyl 3.3L engine. Here is what i have done to it.

    1) pertronix Pointless ignition system with flame thrower coil.
    2) rebuilt the upper-end with new comp cam
    3) reman carb

    Here is the problem.
    when driving it it likes back fire into the engine compartment aka (air filter)
    it does some to be running some what rich, have adjusted the carb choke and found a happy medium where the car will run in cold and or hot weather.

    The car idles at about 7-10 mph. I have looked into the possabilty that not all the cylinders are not firing and they all have spark and all seam to be working the spark plugs all have a nice dark gray / black color to them no white color on the ends.

    Can any one point me in a direction on fixing why i just dont have much power and it back fires all the time.


    Thank you so much!
     
    1970Ford, May 19, 2012
    #1
  2. 1970Ford

    1970Ford Member

    Joined:
    May 19, 2012
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oklahoma
    Vehicle:
    1970 Ford Maverick 2 door 3.3L - L6
    when i use a timing light on it and put the timing where it should be the car hardly runs. I made sure the timing chain marks are on and everything is where is should be everything matches up to what the engine and book say they should be. So what i did is timed it by ear and it is close.
     
    1970Ford, May 19, 2012
    #2
  3. 1970Ford

    1970Ford Member

    Joined:
    May 19, 2012
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oklahoma
    Vehicle:
    1970 Ford Maverick 2 door 3.3L - L6
    How would i go about checking this?
     
    1970Ford, May 19, 2012
    #3
  4. 1970Ford

    1970Ford Member

    Joined:
    May 19, 2012
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oklahoma
    Vehicle:
    1970 Ford Maverick 2 door 3.3L - L6
    Yes the heat riser tube is connected, I will upload a video and show you what the choke looks like before and after it runs.
     
    1970Ford, May 19, 2012
    #4
  5. 1970Ford

    1970Ford Member

    Joined:
    May 19, 2012
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oklahoma
    Vehicle:
    1970 Ford Maverick 2 door 3.3L - L6
    1970Ford, May 19, 2012
    #5
  6. 1970Ford

    1970Ford Member

    Joined:
    May 19, 2012
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oklahoma
    Vehicle:
    1970 Ford Maverick 2 door 3.3L - L6
    1970Ford, May 19, 2012
    #6
  7. 1970Ford

    1970Ford Member

    Joined:
    May 19, 2012
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oklahoma
    Vehicle:
    1970 Ford Maverick 2 door 3.3L - L6
    1970Ford, May 19, 2012
    #7
  8. 1970Ford

    1970Ford Member

    Joined:
    May 19, 2012
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oklahoma
    Vehicle:
    1970 Ford Maverick 2 door 3.3L - L6
    1970Ford, May 19, 2012
    #8
  9. 1970Ford

    1970Ford Member

    Joined:
    May 19, 2012
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oklahoma
    Vehicle:
    1970 Ford Maverick 2 door 3.3L - L6
    1970Ford, May 19, 2012
    #9
  10. 1970Ford

    1970Ford Member

    Joined:
    May 19, 2012
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oklahoma
    Vehicle:
    1970 Ford Maverick 2 door 3.3L - L6
    1970Ford, May 19, 2012
    #10
  11. 1970Ford

    1970Ford Member

    Joined:
    May 19, 2012
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oklahoma
    Vehicle:
    1970 Ford Maverick 2 door 3.3L - L6
    LOL not really, Is there any way of knowing if its a flat cam with out pulling it out?
     
    1970Ford, May 19, 2012
    #11
  12. baddad457

    baddad457 Member

    Joined:
    Feb 24, 2007
    Messages:
    5,861
    Likes Received:
    141
    Trophy Points:
    171
    Location:
    Opelousas La.
    If you have the timing set at the stock specs, advance it about 6 more degrees. If the sixes are anything like the V8's, they'll run 100% better with the timing advanced over the stock specs.
     
    baddad457, May 19, 2012
    #12
  13. Joe Dirt

    Joe Dirt BBF life

    Joined:
    Dec 16, 2008
    Messages:
    4,375
    Likes Received:
    8
    Trophy Points:
    172
    Location:
    Cleveland, TN
    Vehicle:
    1970 ford torino #1
    A cam going flat will pop through the carb, so will a lean bog
     
    Joe Dirt, May 19, 2012
    #13
  14. Dave B

    Dave B I like Mavericks!

    Joined:
    Mar 9, 2002
    Messages:
    16,931
    Likes Received:
    215
    Trophy Points:
    347
    Location:
    Parts Unknown......
    Vehicle:
    3 Grabbers
    Are you checking the timing with the vacuum advance hooked up?
     
    Dave B, May 19, 2012
    #14
  15. 1970Ford

    1970Ford Member

    Joined:
    May 19, 2012
    Messages:
    14
    Likes Received:
    0
    Trophy Points:
    0
    Location:
    Oklahoma
    Vehicle:
    1970 Ford Maverick 2 door 3.3L - L6
    No i pull one vacuum line and plug it before doing the timing.
     
    1970Ford, May 19, 2012
    #15
Page 1 of 2

Share This Page