Need a Diagnosis!!!

[Duker]

My car:
1995 S14
Auto to 5 spd swap
Ka
Walbro Fp


Symptoms:
Going down the road under a load it stutters hard...
once you let off the throttle itll idle an catch back up..
went and checked FP it has 38 at idle 45 WOT and a WOT the Fp drops from there down to 36 again...
i thought it may be a Fuel ump thats when i put in the walbro and a z32 fuel filter that did nothing..... so today i changed the fp regulator... still nothing....
anyone have any ideas????
Could the walbro have already went bad??????
does anyone have any ideas or suggestions???

[nissanfreak317]

i had similar issues due to poor resistance on 2 injectors.
93 s13
ka
5 spd
150k
stock everything

pull all of your spark plugs and post pics/diagnose based on internet pictures.
should be able to tell if leaning out or running rich.

Does it do this all of the time or change based on weather?

[KrazyS13]

Sounds like an injector problem to me as well... The redtop Ka injectors are known to be problematic.