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low fuel pressure = stuttering

Old 11-01-2004, 05:21 PM
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Default 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?
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Old 11-01-2004, 05:36 PM
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Default 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.
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Old 11-01-2004, 07:32 PM
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Default 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 didnít 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.?
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Old 11-01-2004, 10:15 PM
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Default 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
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Old 11-02-2004, 11:04 AM
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Default Re:low fuel pressure = stuttering

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Old 11-02-2004, 02:25 PM
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Default 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
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Old 11-02-2004, 05:03 PM
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Default 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.
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Old 11-07-2004, 11:06 AM
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Default Re:low fuel pressure = stuttering

YEA id check ur friggin gaps ***. u stupid ****** everyone knows that stuttering at high rpms equals spark plug gaps dumb ***, 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 *** off at work doing this cya later rapp, wing
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Old 11-07-2004, 02:13 PM
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Default Re:low fuel pressure = stuttering

Great first post Thanks for the input...
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