what would cause my car to bog, hesitate and even die when i hit the throttle? i can rev at low rpm and when i hit around 3k plus it wants to die. i have some theory like:
i dont have ANY back pressure (open pipe) so the turbo keeps wanting to spin (i havent gotten my down pipe to the exhaust completed yet)
or
my fuel injectors are crapping out
or
my distributor is bad

please let me know what u think though (check my sig for specs).


Modified by 98B00STED at 1:33 AM 4/20/2005

 

it idles ok?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dustin &raquo;</TD></TR><TR><TD CLASS="quote">it idles ok?</TD></TR></TABLE>

yes. until i rev. this happened after my build and the motor hasnt even been broken in...because i cant drive it

 

hmm check that MAP and TPS connectors aren't reversed.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dustin &raquo;</TD></TR><TR><TD CLASS="quote">hmm check that MAP and TPS connectors aren't reversed.</TD></TR></TABLE>

its all good. i actually did have that reversed before which cause it not to fire up at all. im confident all my connections are good now.

 

do you have the timing set right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dustin &raquo;</TD></TR><TR><TD CLASS="quote">do you have the timing set right?</TD></TR></TABLE>

yep. all the obvious has been checked. i guess what im looking for from u guys is something deeper. but i like what ur asking though.

 

You're running off a stock ecu + fmu? do you have a missing link installed?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dustin &raquo;</TD></TR><TR><TD CLASS="quote">You're running off a stock ecu + fmu?</TD></TR></TABLE>

yes

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dustin &raquo;</TD></TR><TR><TD CLASS="quote">do you have a missing link installed?</TD></TR></TABLE>

funny u ask because im running four check valves. i had the turbo on the motor before i built the motor and the check valves ran the car fine. i am looking to swap the check vavles for a misisng link though. u think maybe because i went to a lower compression CP pistons/eagle h-beam rods that my check valves may not be sufficient?

to add. i only built the motor to run the same PSI but more reliably. the turbo will stay 8-9 PSI. maybe 12-15 tops at the tracks.

 

k try taking the check valves out and just put the map sensor directly on the TB. at idle what does your vacuum look like?

don't run more than 7psi on the FMU though.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dustin &raquo;</TD></TR><TR><TD CLASS="quote">k try taking the check valves out and just put the map sensor directly on the TB. </TD></TR></TABLE>

ok ill try that tomorrow (its family dinner time here )

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dustin &raquo;</TD></TR><TR><TD CLASS="quote">at idle what does your vacuum look like?</TD></TR></TABLE>

negative boost...i think -5ish.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dustin &raquo;</TD></TR><TR><TD CLASS="quote">don't run more than 7psi on the FMU though.</TD></TR></TABLE>

really...im in the middle of nowhere here in MN and theres noone here that can tune...until i move back to cali...FMU is all i got. well that kinda sucks i cant go over 7 PSI.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98B00STED &raquo;</TD></TR><TR><TD CLASS="quote">negative boost...i think -5ish.</TD></TR></TABLE>

hmm you should be closer to -20... check for vacuum leaks.

with the AFC hack you can get away with higher boost than 7psi (440cc injectors, walbro pump). But it's a hack.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dustin &raquo;</TD></TR><TR><TD CLASS="quote">

hmm you should be closer to -20... check for vacuum leaks.

with the AFC hack you can get away with higher boost than 7psi (440cc injectors, walbro pump). But it's a hack.</TD></TR></TABLE>

prolly my check valves...oh u know what...maybe my hondata intake gasket...it may not be sitting right.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98B00STED &raquo;</TD></TR><TR><TD CLASS="quote">what would cause my car to bog, hesitate and even die when i hit the throttle? i can rev at low rpm and when i hit around 3k plus it wants to die. i have some theory like:
i dont have ANY back pressure (open pipe) so the turbo keeps wanting to spin (i havent gotten my down pipe to the exhaust completed yet)
or
my fuel injectors are crapping out
or
my distributor is bad

please let me know what u think though (check my sig for specs).


Modified by 98B00STED at 1:33 AM 4/20/2005</TD></TR></TABLE>

do you have a cel?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by BrokenHatch &raquo;</TD></TR><TR><TD CLASS="quote">

do you have a cel?</TD></TR></TABLE>

yes my check engine light is on but i was told that i could not check the cel because of the motor swap and the obd conversion harness and that the obd reader wont read it right. (Honda dealer)

or is it possible for me to check my cel?

 

yes jump the service connector

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dustin &raquo;</TD></TR><TR><TD CLASS="quote">yes jump the service connector</TD></TR></TABLE>

that the green thing by the ecu? i just stick a wire into both slots?

 

yes , it is 2 plugs inside of a green rubber "boot"
https://honda-tech.com/zerothread?id=1171263