i hav a jdm B18C gsr
n i can't cross 6 thousand rpms
i changed the wires, plugs, igniter, coil, oil....
thinkin d problem would hav solved but no luck..
after 6000 rpm it breaks up Badly, backfirin n stuff
i actually feels like it's limitin out
help fellas
thanks

 

check your fuel pressure.. if vtec does not engage, check your oil.. vtec is oil controlled... do you have, or can you get ahold of a friends ecu to try to rule out the possibility of your's being bad?

When did it happen and what were you doing when it happened?

if it breaks up real bad in the high rpms, you might be running out of fuel because of a clogged pump, filter, or pump is going bye bye.... maybe?

ooo yeah... what mods, if any, do you have?

 

bone stock
but would it be tempermental like dat...
cause it's on n off, mostly off
i'll check the pump
but at free revvin it's revs fine

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by type_r_teggy &raquo;</TD></TR><TR><TD CLASS="quote">bone stock
but would it be tempermental like dat...
cause it's on n off, mostly off
i'll check the pump
but at free revvin it's revs fine</TD></TR></TABLE>

Free reving? You mean reving in neutral? Like the other guy said VTEC is oil dependent and to me that sounds like your issue to me. I dont think you said but have you checked your oil to make sure you have enough? Also are you throwing any CEL when it bogs and backfires??

 

do you have the plugs behind the intake manifold plugged correctly? the MAP and TPS are often plugged into the wrong plugs because they look the same.

 

Make sure everything's intact and on the right place.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by type_r_teggy &raquo;</TD></TR><TR><TD CLASS="quote">bone stock
but would it be tempermental like dat...
cause it's on n off, mostly off
i'll check the pump
but at free revvin it's revs fine</TD></TR></TABLE>

VTEC will not operate unless the car is moving a minumum speed. So free revving the car will not operate VTEC.

 

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

VTEC will not operate unless the car is moving a minumum speed. So free revving the car will not operate VTEC.</TD></TR></TABLE>

i think he means it will rev over 6k fine without breaking up free reving,(not hiting vtec) then when he is driving it breaks up over 6k and wont go into vtec???

 

yesterday i did a fresh oil change, n same problem

CEL? sorry no idea

 

cause it really be d fuel pump
i checked those plugs already they in correct(TPS & MAP)

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tegman23 &raquo;</TD></TR><TR><TD CLASS="quote">

i think he means it will rev over 6k fine without breaking up free reving,(not hiting vtec) then when he is driving it breaks up over 6k and wont go into vtec???</TD></TR></TABLE>

I know. My point was that he wasn't comparing apples to apples. If he want to free rev with VTEC, depress the clutch at 30 MPH and free rev. I really thjink he needs to check the oil level etc. OP, are there any CELs?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dogginator &raquo;</TD></TR><TR><TD CLASS="quote">
I really think he needs to check the oil level etc. </TD></TR></TABLE>
I agree this sounds like an oil related problem.

 

fresh oil change! level up to mark

 

but what about oil pressure? check your oil pressure by hooking up a gauge to it... it really sounds like your oil not being strong enough to engage when the vtec solenoid says to... and you may be breaking up in the high rpms, because of a lack or vtec and fuel.... check fuel pressure and oil pressure

 

i'll check
let u guys kno tomorrow....
tks

 

The screen on the VTEC solenoid can clog and block oil flow.

 

^^^^another thing to check

 

check the screen on your cylanoid. and dont forget your VTEC Plug, that little green cylander looking plug attachment. Check that out.. take one off of your buddies.. and try using his and see if it hits, I've seen/heard of those going bad. and also... does your check engine light come on when the car starts to miss?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LsVtecFoti &raquo;</TD></TR><TR><TD CLASS="quote">check the screen on your cylanoid. and dont forget your VTEC Plug, that little green cylander looking plug attachment. Check that out.. take one off of your buddies.. and try using his and see if it hits, I've seen/heard of those going bad. and also... does your check engine light come on when the car starts to miss?</TD></TR></TABLE>

The pressure switch would throw a CEL on a USDM ECU.

 

thanks guys...

 

wats a CEL?
noob...lol

 

CEL = check engine light. See the Integra forum FAQ.

 

lol, or nah no checklite

although about a 2 weeks ago, i cut off n when i tried to start back, it wasn't startin n the checklite was on..
but when i went to get a code it wasn't giving me any... wat could cause dat?

but the nex day it start normal...

 

check engine light.. read faq's for terminology... haha

 

usually a CEL that is there, but doesnt throw a code is a random misfire... they usually do not show up as codes, just as a CEL...