b16 turbo em1

some times it wills tart good and run good,

but when i fill up (shell premium) i have a hard time starting the car at the pumps. . gas cap is clicked more than three times and i have trouble keeping it alive, i drive for a block and its good,

but then problem number two. . driving at about 60km'h through town and a steady pace. . in any gear at any speed i guess. . when i have a steady throttle the car sounds liek its missing spark and it pops and slows downt he car and fires back up again. .

installed new walbro 255 fuel pump

still the same

 

bump

 

ttt

 

the sputtering might be a loose of spark cause of bad dizzy,wires or sparkplug.or try chaging the fuel filter.

 

well it happens only between 2000-4000 rpm all the other rpms are fine they dont sputter or anything. . i'm thinking vacuum leak??? because when it cuts in and out very briefly my vacuum goes from -15 to -5 when it misses.. . but it only does it within those RPM's

and nothing has changed to my car since it was tuned in september wich ran perfectly fine till now

and wideband goes rich when it misfires

 

would something like this be worth giving a try? would it maybe be a vacuum leak?