low fuel pressure = stuttering
 

Could low fuel pressure cause stuttering at full throttle/full boost?

The spark plug gap is fine and I am running zydne and have all the fuel necessities, my fuel pressure gauge reads about 31psi. I think I had a similar problem on another turbo setup before and turning the fuel pressure up helped. Anyone have this problem?

Re:low fuel pressure = stuttering
 

Can you list more about your setup etc.? How many miles are on the engine and all. It could actually be a number of things, but knowing a little more about what's been done/what engine etc. might help us to narrow things down.

Re:low fuel pressure = stuttering
 

zc with 40k
550
15g turbo
255 walbro fuel pump
fpr
zydne GS
I was at 9lbs of boost but it crept up to around 11 and I started to notice the stuttering at full boost. I tried to turn the boost down on the turbonetics external waste gate but it didn’t seem to want to come down. So I am going to get the boost turned down when I get a chance to mess with it some more, but I still wanted to know why it does this when the boost is up.?

Re:low fuel pressure = stuttering
 

what type of plugs/gap are u running? do some research on this, it may be the cause...its worth it since plugs are only a few bucks compared to unneccesarily upgrading your fuel system...unless you need to

Re:low fuel pressure = stuttering
 

you may find this thread useful ;)

https://www.homemadeturbo.com/forum/...threadid=29662

Re:low fuel pressure = stuttering
 

thanks for the link and info. My plugs could be getting old but they are gapped at .030. I will check that again thanks

Re:low fuel pressure = stuttering
 

Also check/replace your wires, cap and rotor if it hasn't been done yet. My Civic had a nasty stuttering problem that turned out to be a bad cap and rotor.

Re:low fuel pressure = stuttering
 

YEA id check ur friggin gaps fag. u stupid fucker everyone knows that stuttering at high rpms equals spark plug gaps dumb ass, so do that and bump up the fuel pressure retard then ur set for a real race against some real blown muscle. Ps had that same problem on the dyno
haha had to give ya ---- i laughed my ass off at work doing this cya later rapp, wing

Re:low fuel pressure = stuttering
 

Great first post ::) Thanks for the input...