low fuel pressure = stuttering
11-01-2004, 05:21 PM
#1
0.5 BAR
Thread Starter
Join Date: Apr 2003
Posts: 121
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?
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?
11-01-2004, 05:36 PM
#2
3.0 BAR
Join Date: Mar 2003
Posts: 5,282
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.
11-01-2004, 07:32 PM
#3
0.5 BAR
Thread Starter
Join Date: Apr 2003
Posts: 121
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.?
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.?
11-01-2004, 10:15 PM
#4
0.0 BAR
Join Date: Sep 2004
Posts: 5
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
11-02-2004, 11:04 AM
#5
3.0 BAR
Join Date: Feb 2003
Posts: 9,089
Re:low fuel pressure = stuttering
11-07-2004, 11:06 AM
#8
0.0 BAR
Join Date: Nov 2004
Posts: 1
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
haha had to give ya ---- i laughed my *** off at work doing this cya later rapp, wing
Thanks for the input...
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