Stumble
 

When i am just about to hit boost around 1 psi vaccum, my car starts to jerk/stumble and then it starts to pull, also if i flour it it jerks/stumbles more.

93civic
12:1 FMU
14b
6 psi
check valves
timing retard 2 degrees
94 octane

IS it better to use synthetic oil over regular?

Re:Stumble
 

i think it's your flour.

Re:Stumble
 

there is also semi synthetic

Re:Stumble
 

i had that problem when I was giving the car to much fuel

Nick

Re:Stumble
 

i think it's yo fuel to

Re:Stumble
 

stock fuel pump???? Maybe its loosing PSI cuz the FMU is uping it to like 90+psi do u have a A/F guage?

Re:Stumble
 

yes i have an air fuel guage

Re:Stumble
 

i was thinking of ditching the FMU setup and gettting dsm injectors and an apexi afc, as there is more tunning available, IS this a good route to go?

Re:Stumble
 

FMU's stumble all the time, there's probably nothing you can do except change your fuel management.

Re:Stumble
 

Your car's toast. You might as well just sell it to me for $100 ;D. Just kidding. Yeah definatly too much fuel. Are your injectors stock?