Alright here's my problem, im at low rpm, then i start to build boost, then around 5-6 K i begin to bog somewhat, boost doesn't feel as smooth when it starts to spool up, almost like its hesitating.

Although currently i have high fuel pressure it shouldn't affect my performance to that extent. I checked cylinder #1 spark plug and it seemed fine, i will still most likely replace them. I also had the ignitor replaced in the distributor before the car was even tuned.

So i'm wondering what other issues may be causing this problem, i will check tomorrow once i get my plugs to see if it keeps occuring, but i'm wondering for future references what else it may be. Also the wires are new too so i highly doubt its them.


thanks

 

Post your full setup, especially your fuel managment. Im hoping you have one of those..

 

b18c longblock
.5 over
cp pistons/eagle rods
sc61 to4s cover
720 rc's
uberdata
inline pro mani
38mm tial wg

 

Sounds like a fuel or ignition problem to me. Get a wideband on it and report back with some AFR #'s.

 

car was just freshly tuned about a week and a half ago, if anything i'm thinking my current fuel problem that i have may be the issue but to cause the turbo to hesitate alittle i can't really see that

 

what heat range are your plugs?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by FredoSP &raquo;</TD></TR><TR><TD CLASS="quote">what heat range are your plugs?</TD></TR></TABLE>

not 100% positive, but i know they are the NGK BCPR7E's and i have them gapped around 28-29

 

Is this happening right after cross-over? If so, are you on ITR's?
Post a screen shot of the appropriate fuel map in 2d.

 

no its happening before cross over and yes i'm on itr's

 

i think it's a tune. you might want to clean up your map a little more.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by h22boy &raquo;</TD></TR><TR><TD CLASS="quote">i think it's a tune. you might want to clean up your map a little more.</TD></TR></TABLE>

it was running PERFECT when i got it back, right now i believe i'm running 65+psi fuel pressure at idle (not too sure cause my gauge broke and the liquid filled is comming in tomorrow)

 

here's a graph of my tune

 

to me it sounds like fule problems.. when i was running around on an open FMU w/ no FULE contorler.. and 440's as soon as i would spool the car would BUCK/Hesitate.. like a bastard.. .. ya i was flooding it.. yup i'm a dummy i know.. new block is on its way.. anyway.. i ended up cracking all 4 pistons.. and scuffing 3 cyilder walls.. check your fule... and ing...