Guest daveh70 Posted December 20, 2011 Share Posted December 20, 2011 Sometimes when gaining speed, the engine briefly stops responding to gas pedal. Car starts coasting. Two seconds later car responds to pedal again. Motor is NOT stalling. I have the Variable pitch dynaflow on a '58 Special. Wondering if it's a very slow transmission shift to 2nd gear? Transmission slipping? Transmission fluid level is fine. Dirty automatic trans filter, faulty converter pump? Vacum leak in the fuel vacum system? May be hesitation/faulty accelerator pump in carb? Link to comment Share on other sites More sharing options...
Guest kaycee Posted December 20, 2011 Share Posted December 20, 2011 This does'nt sound like a Dynaflow problem. First of all , the Dynaflow does not upshift on a variable pitch. It sounds more lke a carburetion problem or possibly an ignition problem. How does it run once you "get it going"? kaycee Link to comment Share on other sites More sharing options...
Guest daveh70 Posted December 20, 2011 Share Posted December 20, 2011 Runs and drives just fine. Idle may be a little high, but car has no tach so a little hard to tell. As mentioned car just doesn't respond to throttle briefly, then few seconds later it's ok. So not a transmission issue huh? I did change the fuel filter in front of carb hoping that would solve it, but didn't do anything. Link to comment Share on other sites More sharing options...
Bhigdog Posted December 20, 2011 Share Posted December 20, 2011 Might be accelerator pump in carb not functioning. Doesn't sound like a trans problem..........Bob Link to comment Share on other sites More sharing options...
Guest kaycee Posted December 21, 2011 Share Posted December 21, 2011 As Bob said, it sounds like a accelerator pump in the carb. with the hesitation you describe. kaycee Link to comment Share on other sites More sharing options...
Guest Koala Posted December 21, 2011 Share Posted December 21, 2011 Just sounds like a bit of fuel vaporisation to me, happens all the time with the modern fuels. Usually afer the car has been driven and parked for a short while. Worse on hot days.Koala Link to comment Share on other sites More sharing options...
smithbrother Posted December 21, 2011 Share Posted December 21, 2011 If you TAP a couple times or FLUTTER the gas pedal what happens? I too feel carb internal pump may be the issue. Dale in Indy Link to comment Share on other sites More sharing options...
Guest daveh70 Posted December 22, 2011 Share Posted December 22, 2011 Haven't tried the tap or flutter of the pedal. What I've done is completely release the pedal after it's happened. Then I slowly accelerate and the response kicks in again. Link to comment Share on other sites More sharing options...
smithbrother Posted December 22, 2011 Share Posted December 22, 2011 Years ago the carb pump in a car of mine was in need of repair, and I found that I could tap the pedal and it would respond, just anther way to learn what the issue is. IMO. I wish you well,Dale in Indy Link to comment Share on other sites More sharing options...
bhambulldog Posted December 29, 2011 Share Posted December 29, 2011 Mine did that twice. One time it was a clogged fuel filter. Another it was a loose wire on the coil. Link to comment Share on other sites More sharing options...
buick man Posted January 6, 2012 Share Posted January 6, 2012 The new government subsidized corn for ethanol ( Corporate Welfare ), is causing a lot of problems. Take your carb apart and do this to increase atomization. - "Enlarging AFB channel restrictor to cure lean-off idle stumble" That is if you have a Carter Carb. Link to comment Share on other sites More sharing options...
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