Kevdx

@rebuilder86no bro ,no stall or stumble when you start it.also I need to chock the carb by hand Everytime I need to start it I've also check the booster still got the same prob

@LittleRedSpirit @altezzaclubthanks for the reply dude I've already dump the old fuel.ive also change the carb yesterday with a running condition 4k carb still having the same problem.no back fire.sometime when you slam the throttle the car feels like as if not enough fuel going in the only thing that I did not change now is the a/c pump could it be when the car going high rev then suddenly the pump couldn't make it in time to fill the carb with enough fuel inside the carb.also today I've bought a electric fuel pump from a daihatsu hijet.and before this also no black smoke even when tune carb to rich a/f mixture.

Hey guys Kev here from sarawak,borneo.I'm new with this 4k engine and ive got this ke70 dx model with 4k engine too.i got this car for rm800 from a friend that have not died for years.last 2 years he bought a new carb for this car and the car was alive until the alternator died and he left it dead untill I bought it.when I bought it,got alternator change and I switch it's carb to a mitsu 4g13 carb it came back to life.the problem is every time I need to start it I have to choke the carb and floor the paddle the same time..everytime(idle at 700).then Everytime braking the car stall.ive also change the coil and distributer to electronic type which the old one still uses contact point.then got the timing for the distributer and all set properly(no misfiring) Still the same prob.ive also check if there any blockage inside the fuel tank(got it all remove actually including the pipe lines) ive tested it's brake booster one way valve.or is it something with the valve clearance or any vacuum on the engine? Really need everyone helps.totally out of idea bout this