i cant figure out why my vtec sometimes is not as loud and pulling as hard as most of the time. normaly it goes vroooooooooooooBBBBRROOOOOMMM, you all know what i mean.. but some times it just goes vroooooooooooobrooom, vtec is xing over but its no where near as loud or pulling hard. what does that mean?
i ask alot of questions i know but you guys a smart and maybe someone has experianced this problem. and yes i have searched and did not find anything...
btw i have a 93 hatch with a jdm b16a with kenji chipped p28, msd 6a, aem fuel crap, itr intake man. itr header. not sure about the cams i was told the are skunk2 stage 1 but im skeptical. also check out my other post about my aem fuel pressure reg question please!!
https://honda-tech.com/zerothread?id=507688

 

you searched and didnt find anything.... what were your search words? "vroooooooooooobrooom" and "vroooooooooooooBBBBRROOOOOMMM"?

 

ha ha, but actualy yes. try it...

 

Have you changed your oil? Could be oil pressure.. Check you v-tec selonoid.

 

it depends on how much load is on the engine. Your vtec isn't always going to sound the same. Oil pressure has nothing to do with it. If it's engauging, it's engauging. It's not like lower oil pressure will make it engauge lighter... if you have enough oil pressure, its engauging. thats like the dude that asked if two vtec sulenoids would make his vtec hit harder, haha.

Anyway, its all load dependant. Might be bad tuning causing it to bog.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Unsung EM1 &raquo;</TD></TR><TR><TD CLASS="quote">it depends on how much load is on the engine. Your vtec isn't always going to sound the same. Oil pressure has nothing to do with it. If it's engauging, it's engauging. It's not like lower oil pressure will make it engauge lighter... if you have enough oil pressure, its engauging. thats like the dude that asked if two vtec sulenoids would make his vtec hit harder, haha.

Anyway, its all load dependant. Might be bad tuning causing it to bog.</TD></TR></TABLE>
WRONG low oil pressure will cause this exact problem.

vtec is based off of oil pressure.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Kamin &raquo;</TD></TR><TR><TD CLASS="quote">
WRONG low oil pressure will cause this exact problem.

vtec is based off of oil pressure.</TD></TR></TABLE>

WRONG low oil pressure will not cause your vtec to engauge softer. Read, understand, comprehend.

 

bullshit because i had it happen TO ME

look how the pins in the rocker arms work, off of oil pressure

if the pressure is low it wont engage vtec on all cylinders and on both cams.

and that would make a "softer" vtec.

i had a dent in my oilpan, it was hitting the pickup, on a dyno it made 118 whp but you could HEAR VTEC, there was low oil pressure because the pan was hitting the pickup.

i fixed the pan, it made 14x WHP after that. and vtec sounded louder.

 

First time i've ever heard of that happening. Oh well, no point in typing in bold and trying to call someone out for not knowing everything. Im sure it made you feel better tho.

 

im trying to tell the creator the correct information.

 

What you say makes sense... what does my mechanic know.. all she's good for is looking pretty.. hehhe

 

i find it hard to believe that low oil pressure would cause only certain cy;inder to run in vtec....my theory is that if you have a gasr motor what your hearing is vtedc engaging at 4400 and not feeling the so called vtec engagement point at 5800ish which is really you secondary butterfly valves opening....whne your secondaries dont open the cars inst as loud but feels as if power drops off after it engages..this is do to the lack of air and the torque curve falling off...i have no idea what the b16 is doing because it doesnt have secondaries etc..good luck w/ you fix

 

did you fully warm up your car. i belive it COULD be oil pressure, but i dont think thats the problems in many cases. mabye you're one of the few?

 

haha broom broom....vtec is for power, not noisse, doesnt matter if u hear it...

 

did you make sure the v-tec wire are hooked up and didnt come loose by anychance?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybridvteceg &raquo;</TD></TR><TR><TD CLASS="quote">haha broom broom....vtec is for power, not noisse, doesnt matter if u hear it...</TD></TR></TABLE>

true but if i dont hear it i dont feel it either...
see vtec is engaging it just sometimes does not pull or sound like other times. i thought maybe it had somthing to do with my oil but my level is fine and i dont have any dents in my pan.
the odd thing is i adjusted my fuel pressure yesterday and it seems to be much louder now?? that doesnt make sence.
could it possibly be one cam is engaging and the other isnt?

 

so u have to hear something to know it there&gt;?

 

wait what were those sounds again?.. prob ur oil man, thats what my problem was

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by hybridvteceg &raquo;</TD></TR><TR><TD CLASS="quote">haha broom broom....vtec is for power, not noisse, doesnt matter if u hear it...</TD></TR></TABLE>aww, cmon, u know that vtec w/ a cai puts a big smile on ur face when u hear it!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMCivicHatch93 &raquo;</TD></TR><TR><TD CLASS="quote">

true but if i dont hear it i dont feel it either...
see vtec is engaging it just sometimes does not pull or sound like other times. i thought maybe it had somthing to do with my oil but my level is fine and i dont have any dents in my pan.
the odd thing is i adjusted my fuel pressure yesterday and it seems to be much louder now?? that doesnt make sence.
could it possibly be one cam is engaging and the other isnt?</TD></TR></TABLE>

ur just hearing things...

 

bump

 

shut up holman, you know you would be pissed if you were havin this prob too.

we need to get our cars on a dyno. then maybe i can figure out what the hell is wrong with the damn thing. i got smoked my an rsx? its bullshit i tell you. vtec decides not to work at the wrong times. theres gotta be some reason it would just stop working like that. bad wiring maybe or the engine is just a piece of *****. f-in hondas pissin me off. it WAS fast for like a week then it started falling apart.

 

haha <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMCivicHatch93 &raquo;</TD></TR><TR><TD CLASS="quote">shut up holman, you know you would be pissed if you were havin this prob too.

we need to get our cars on a dyno. then maybe i can figure out what the hell is wrong with the damn thing. i got smoked my an rsx? its bullshit i tell you. vtec decides not to work at the wrong times. theres gotta be some reason it would just stop working like that. bad wiring maybe or the engine is just a piece of *****. f-in hondas pissin me off. it WAS fast for like a week then it started falling apart. </TD></TR></TABLE>

sell it to me for 100$ if its junk.

 

just add a zero and you got yo self a deal (for just the motor)

 

The VTEC pop can be deceiving. Sometimes you can hear it...sometimes you dont. Unless you cant feel it pulling anymore...VTEC may not be engaging. Its better to fell VTEC rather than hear it to check if its working or not.

Try your oil...oil pressure can cause vtec not to engage (happened to me so dont flame)...do a voltage and continuity check on the vtec solenoid and connectors.

You can also try playing around with the amount of throttle you give...vtec can be more audible in some rpm ranges and how much throttle you give it. Is your engine up to temperature? VTEC wont hit when the engine is cold