Rebuilt carb, tried adjusting air/fuel/idle bolts, replaced plugs, fuel filter, tested fuel pump. Seems to run rich(draining carb of fuel, strong smell) despite the adjustments to the air/mixture bolt. Can get it to idle at 1500rpm but if revved will drop to 500 and die(usually does this immediately). Will idle with choke. Lacks power, 10 seconds to redline in neutral and dies around 20 mph and bucks in 2nd gear, again, assuming it is running dry. It has good fuel flow, but seems to eat more fuel than being given. Also, adjusted floats, they are not exact, but we are sure they are close enough for the purpose of getting it running.
I have the same prob but when i do get it running at bout 70 miles per hour i boggs and wants ta die at idle when i get to a lower speed after i restart it. ive changed the fuel filter and pump n cleened the tank. when i first got the car it had no probblems. no the car will barley start n if it dose it runs fine for a minute then i loose most of the power n it wants to die when i go ta idle. HELP!!!
Try redoing the "idle speed and mixture" process with the fuel filler cap off-- If that solves the problem your evap system is hosed (no pun intended.)
Sounds like carb idle air or fuel jets are clogged.. Test pressure with a gauge to be sure. Float level and drop needs to be exact.. Operation of the whole carb relies on this. Probably why you are not getting any change in your air/fuel adjustments.
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Check to see if there's a vacuum leak at the base gasket. Let it idle and spray a little carburetor cleaner around the base. If the idle goes up, the spray is sealing the leak momentarily. If it's getting too much air, it's the same as not getting enough fuel.
It would appear that the Black smoke is unburnt fuel, meaning Spark or timing could also be out. Check you plug and point gaps. If you rebuilt the carby, float level is crucial also check the needle and set to ensure it is shutting off the fuel, if it is not shutting off, it will just flood the engine. Not sure what carby you have but I woud pull out the jets/power valve and replace them. Some carbys have a small ball bearing to control fuel, if that was lost that could be it. Pull up an exploded diagram of the carby and do it again. I know its time consuming, but it will be peace of mind. Good luck
Well, you are either not getting enough gas or air. First try taking off your air cleaner and then try to start your car. If that works than just buy a new air filter. If not, try repulsing your fuel filter. Should be under the car between the gas tank and engine. It is a cheap part but serves its purpose. Also you should replace your spark plugs and wires just for regular maintenance. If that doesnt work it could be either the fuel pump or carb. if you don't know that much about those, don't try to monkey around with it. Have a friend or a shop do it. But,,,, before you pay out your *** for unnecessary shop work check out prices for a new carb or fuel pump.
Your problem is could be one or more of those things. And for the very worst scenerio, could be a blown head gasket. Check out the easy stuff first and work your way to the others
The thing to do now is a fuel pressure test pump could be weak just a few pounds under the recamended pressure will do that weather its mechanical or electrical . Is there a filter in the carb. wear fuel fine hooks? If none of this is an issue at least you can eliminate fuel deliverly as the problem.
Have you done a back pressure test on it? If you have no idea what I'm talking about, unbolt exhaust at heads or before the catalitic converter/converters. Try starting then driving it then. If that solves your problem, your catalitic converter/converters are clogged.
fuel pressure is weak. cleaned the carb and changed the fuel lines as well as the fuel pump. help please
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