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    Author Topic: Starting Issues?  (Read 3742 times)

    Offline cv70chall

    • Jr. Member
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    • Posts: 301
    • 1970 Challenger
    Starting Issues?
    « on: May 17, 2017 - 09:34:55 AM »
    I have a 70 R/T, 440 Auto with Holley 670 Avenger. Car will fire up normally cold, and 9 times out of 10 normally when warm.
    Every 4 or 5 starts, it behaves as if it's not getting fuel- and struggles to start.
    Battery and Starter are fine- checked.
    Carb issue?
    Fuel Pump?

    S.O.S.

    Logged


    Offline 69bcuda

    • Jr. Member
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    • Posts: 93
    Re: Starting Issues?
    « Reply #1 on: May 17, 2017 - 09:50:20 AM »
    When it has trouble and don't start, pull the air cleaner, pump the throttle once by hand and note the pump shot you get. No shot, low fuel in carb or carb pump is failing.
    Logged

    Offline cudabob496

    • Sr. Resident
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    • Posts: 8024
    Re: Starting Issues?
    « Reply #2 on: May 17, 2017 - 01:34:24 PM »
    I had to drill small holes in throttle plates for engine to get enough
    air when starting. The newest Holley carbs have a bypass valve
    that accomplishes the same thing.

    Make sure engine well grounded with big cable/strap.

    What is initial timing?
    Logged
    72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

    1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

    2011 Kawasaki Z1000

    Offline 734406pk

    • Andy
    • Sr. Member
    • ****
    • Posts: 1716
    Re: Starting Issues?
    « Reply #3 on: May 17, 2017 - 08:07:31 PM »
    Quote from: cv70chall on May 17, 2017 - 09:34:55 AM
    I have a 70 R/T, 440 Auto with Holley 670 Avenger. Car will fire up normally cold, and 9 times out of 10 normally when warm.
    Every 4 or 5 starts, it behaves as if it's not getting fuel- and struggles to start.
    Battery and Starter are fine- checked.
    Carb issue?
    Fuel Pump?

    S.O.S.

    Are you using an ethanol blend fuel?
    Logged
    1973 Challenger 440 6 pack auto 3.91 rear
    2012 Dodge Ram 3500 dually 6.7 Cummins Fleece EFI Live
    1973 Challenger 318 2bbl auto 2.73 rear 22.5 mpg RIP
    1970 Challenger TA 340 4bbl auto-Sold and sad
    1999 Dodge Ram 3500 dually 5.9 Cummins Fleece tuned VGT-sold
    1995 Kawasaki ZX1100E & still alive

    Offline cv70chall

    • Jr. Member
    • **
    • Posts: 301
    • 1970 Challenger
    Re: Starting Issues?
    « Reply #4 on: May 18, 2017 - 07:34:38 AM »
    Yes, 93 Oct when I have to. I try to stay with REC90 when I can.
    Logged

    Offline cudabob496

    • Sr. Resident
    • ******
    • Posts: 8024
    Re: Starting Issues?
    « Reply #5 on: May 18, 2017 - 12:24:52 PM »
    heat shield around carb? insulated fuel lines?
    Logged
    72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

    1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

    2011 Kawasaki Z1000

    Offline 734406pk

    • Andy
    • Sr. Member
    • ****
    • Posts: 1716
    Re: Starting Issues?
    « Reply #6 on: May 18, 2017 - 08:19:23 PM »
    Quote from: cv70chall on May 18, 2017 - 07:34:38 AM
    Yes, 93 Oct when I have to. I try to stay with REC90 when I can.


    Common problem with ethanol blend fuel, it has a lower boiling point. When you shut down the engine, the carb can "heat soak"  boiling off the fuel.  You can try a carb heat shield.

    http://www.coolcarb.com/index.html

    Are you exhaust cross over ports blocked?
    Logged
    1973 Challenger 440 6 pack auto 3.91 rear
    2012 Dodge Ram 3500 dually 6.7 Cummins Fleece EFI Live
    1973 Challenger 318 2bbl auto 2.73 rear 22.5 mpg RIP
    1970 Challenger TA 340 4bbl auto-Sold and sad
    1999 Dodge Ram 3500 dually 5.9 Cummins Fleece tuned VGT-sold
    1995 Kawasaki ZX1100E & still alive

    Offline cudabob496

    • Sr. Resident
    • ******
    • Posts: 8024
    Re: Starting Issues?
    « Reply #7 on: May 19, 2017 - 12:08:31 AM »
    easy to make your own with sheet metal.
    Logged
    72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

    1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

    2011 Kawasaki Z1000

    Offline 734406pk

    • Andy
    • Sr. Member
    • ****
    • Posts: 1716
    Re: Starting Issues?
    « Reply #8 on: May 19, 2017 - 12:45:18 AM »
    I think the Poly-Core insulating material used in the Coolcarb plate has the advantage on blocking heat.
    Logged
    1973 Challenger 440 6 pack auto 3.91 rear
    2012 Dodge Ram 3500 dually 6.7 Cummins Fleece EFI Live
    1973 Challenger 318 2bbl auto 2.73 rear 22.5 mpg RIP
    1970 Challenger TA 340 4bbl auto-Sold and sad
    1999 Dodge Ram 3500 dually 5.9 Cummins Fleece tuned VGT-sold
    1995 Kawasaki ZX1100E & still alive

    Offline cv70chall

    • Jr. Member
    • **
    • Posts: 301
    • 1970 Challenger
    Re: Starting Issues?
    « Reply #9 on: May 23, 2017 - 03:06:53 PM »
    Order in!

    Question. I need to know exactly where the idle adjustment is on the Street Avenger 670..

    Please
    Logged

    Offline cudabob496

    • Sr. Resident
    • ******
    • Posts: 8024
    Re: Starting Issues?
    « Reply #10 on: May 24, 2017 - 03:31:34 PM »
    Logged
    72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

    1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

    2011 Kawasaki Z1000

    Offline Chryco Psycho

    • Administrator
    • C-C.com Guru
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    • Posts: 36620
    • 70 Challenger R/T SE 70 tube Chassis Cuda now sold
    Re: Starting Issues?
    « Reply #11 on: May 24, 2017 - 03:40:40 PM »
    Idle speed is the screw on the throttle shaft lever
    Idle mix is 1/3 of the up the sides of the metering plate between the carb bowl & throttle body
    Logged

    Challenger - You`ll wish You Hadn`t

    Offline cv70chall

    • Jr. Member
    • **
    • Posts: 301
    • 1970 Challenger
    Re: Starting Issues?
    « Reply #12 on: May 26, 2017 - 04:18:33 PM »
    Not to be stupid, but I can't locate it on the diagram.  Lol
    Logged

    Offline cudabob496

    • Sr. Resident
    • ******
    • Posts: 8024
    Re: Starting Issues?
    « Reply #13 on: May 27, 2017 - 01:20:47 AM »
    Quote from: cv70chall on May 26, 2017 - 04:18:33 PM
    Not to be stupid, but I can't locate it on the diagram.  Lol

    oops, sorry, my diagram only shows one side of carb.
    Logged
    72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

    1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

    2011 Kawasaki Z1000

    Offline cudabob496

    • Sr. Resident
    • ******
    • Posts: 8024
    Re: Starting Issues?
    « Reply #14 on: May 27, 2017 - 01:25:56 AM »
    « Last Edit: May 27, 2017 - 01:28:51 AM by cudabob496 »
    Logged
    72 Cuda, owned 25 years. 496, with ported Stage VI heads, .625 in solid roller, 254/258 at .050, 3500 stall, 3.91 rear. 850 Holley DP, Reverse manual valve body.

    1999 Trans Am, LS1, heads, cam, headers, stall, etc! Love to surprise the rice rockets with this one. They seem so confident, then it's "what the heck just happened?"

    2011 Kawasaki Z1000
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