From 8k-9k rpm the motor bogs, like it's hesitating to climb from 8k-9k. I changed the fuel filter so far and tried another ignitor. I think the other ignitor was bad becaue the tach was a bit jumpy. Im going to try someone elses dizzy next. what do you guys think it can be?

 

injectors might be maxing out if the setup is built enough

 

put it on the wideband and see what the af is doing, my bet is that your fuel system isnt keeping up or maybe your cam isnt big enough...

 

Whats your setup. The more details you give, the easier it is for us to come up with a scnerio.

 

usdm itr pistons, itr head, m22 cams, rmf header, aebs manifold, 70mm throttle body. It never used to do it, it just started doing it. It might of started doing it after the motor got hot a little bit. But it's already dyno tuned so a/f is straight. Injectors are 270cc RC. Doubt they are maxing out.

 

?

 

270cc are fine, i had 270cc on my old lsvtec set up and i was using ctr pistons and they dint max out.....

 

help

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by faSHOwidIT &raquo;</TD></TR><TR><TD CLASS="quote">usdm itr pistons, itr head, m22 cams, rmf header, aebs manifold, 70mm throttle body. It never used to do it, it just started doing it. It might of started doing it after the motor got hot a little bit. But it's already dyno tuned so a/f is straight. Injectors are 270cc RC. Doubt they are maxing out.</TD></TR></TABLE>


do u have a stock feul pump?

 

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


do u have a stock feul pump?</TD></TR></TABLE> yes. but it all worked out before. Stock fuel pump should be good to 250-300hp right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by faSHOwidIT &raquo;</TD></TR><TR><TD CLASS="quote"> yes. but it all worked out before. Stock fuel pump should be good to 250-300hp right?</TD></TR></TABLE>

tell you the truth, i've always used an walbaro pump..so i couldnt tell you

 

ECU!!!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dat1BVtecN &raquo;</TD></TR><TR><TD CLASS="quote">ECU!!!</TD></TR></TABLE> i will be trying that soon. how does the ecu go bad?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by faSHOwidIT &raquo;</TD></TR><TR><TD CLASS="quote"> i will be trying that soon. how does the ecu go bad?</TD></TR></TABLE>

My guess is either your Fuel Pump isnt keeping up or you need some Ignition tuning in the high RPM's

 

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

My guess is either your Fuel Pump isnt keeping up or you need some Ignition tuning in the high RPM's</TD></TR></TABLE> that's the thing. i already got it tuned and it ran good before. it all started happening after it overheated a little.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by faSHOwidIT &raquo;</TD></TR><TR><TD CLASS="quote"> that's the thing. i already got it tuned and it ran good before. it all started happening after it overheated a little.</TD></TR></TABLE>

Have you checked the spark plugs and wires?