JD95hatch

Alright...heres the problem...i just finished my swap/install and am having an idle problem...the engine is UNTUNED, i switched between both AFC hack/stock p28 and a chipped p28 with basemap and still engine reacts the same way.

I will fire up the engine and it will being to lope once it gets up to temp...650-720rpm and eventually cut out..

When i was driving the car, i brought it up to 4500rpm...normally i hit boost around 3500 but this time..nothing...my boost guage still read in vacuum.

What do you think??




Modified by JD95hatch at 3:24 PM 4/22/2005

Blazin Civic

Check for vacum leaks. Also check the couplers on the charge pipes.

Dragline

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blazin Civic &raquo;</TD></TR><TR><TD CLASS="quote"> Check for vacum leaks. Also check the couplers on the charge pipes.</TD></TR></TABLE>

vaporboy12

check map sensor

h22 civic

what is you car vacuming at idle ?

mamaboy

check v @ map sensor

IN VTEC

iTrader: (3)

What kind of software was used to create the startup map?

I've run into similar symptoms before. Low idle vacuum (~19" Hg), rough warm idle, and low warm idle. The problem was that the fuel basemap was too lean...way too lean...around 24:1 AFR.

JD95hatch

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IN VTEC &raquo;</TD></TR><TR><TD CLASS="quote">What kind of software was used to create the startup map?

I've run into similar symptoms before. Low idle vacuum (~19" Hg), rough warm idle, and low warm idle. The problem was that the fuel basemap was too lean...way too lean...around 24:1 AFR.</TD></TR></TABLE>

well..i rule that out becuase the problem was present with BOTH fuel managements

but didnt check the vacuum number...will do tommorw..

JD95hatch

also..i swapped map sensor from old engine over...so im hopin its just a vacuum leak...

IN VTEC

iTrader: (3)

What size injectors are you using? And, does the "chipped" ECU's ROM have the proper injector correction factor?

JD95hatch

like i stated...it shouldnt matter becuase when i ran the chipped ECU...chipped with a basemap from uberdata it ran the same when i swapped ECUs and ran the AFC Hack

but im sure my ECU guy is good for his work....

Dragline

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Blazin Civic &raquo;</TD></TR><TR><TD CLASS="quote"> Check for vacum leaks. Also check the couplers on the charge pipes.</TD></TR></TABLE>

IN VTEC

iTrader: (3)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JD95hatch &raquo;</TD></TR><TR><TD CLASS="quote">like i stated...it shouldnt matter becuase when i ran the chipped ECU...chipped with a basemap from uberdata it ran the same when i swapped ECUs and ran the AFC Hack</TD></TR></TABLE>
Maybe they're both improperly calibrated.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JD95hatch &raquo;</TD></TR><TR><TD CLASS="quote">but im sure my ECU guy is good for his work.... </TD></TR></TABLE>
I assumed the same thing too....until I double-checked his work. We're talking about a reputable guy. It was probably just an oversight, but you can't always take everything for granted, especially when it comes to Uberdata startup map hand-outs.

JD95hatch

Even though it revs fine u still think it could be running lean??

IN VTEC

iTrader: (3)

Yes. In my scenario, the car drove an hour down to me before I found out how lean it was.

Aside from the idle vacuum being a bit low, it drove fine for the most part, but it would buck quite a bit on throttle changes and throttle on conditions.

JD95hatch

finally got some vacuum numbers...idle ~ 21psi 4k RPM ~14psi.

could i have my BOV adjusted so that all the boost is escaping?...i have a greddy type S