skiracer8148

just looking for an answer.someone told me that vtec works different if the cars not running right.for example if the check engine light is on the vtec could be weaker than if the car was running perfect.can vtec run at diff %'s or is it all or nothing.

white ex

It either works or it doesn't.

SlammedDC2

Some CEL codes will put the car in limp mode and then there is no vtec at all.

KLiK

also, if you don't have enough oil pressure (will be detected of the oil is under MIN, or MAX), then you don't have VTEC...

it has 7 safetys...first was mentioned...
2. also there is water temp. that must be over 70°C! (not sure if the temp. is right?!)
3. you must go faster than 13km/h or 8mph!
4. clutch must be released!
5. no CEL! (or no engine error codes)
6.
7.

cambopheonix56

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by KLiK &raquo;</TD></TR><TR><TD CLASS="quote">also, if you don't have enough oil pressure (will be detected of the oil is under MIN, or MAX), then you don't have VTEC...

it has 7 safetys...first was mentioned...
2. also there is water temp. that must be over 70°C! (not sure if the temp. is right?!)
3. you must go faster than 13km/h or 8mph!
4. clutch must be released!
5. no CEL! (or no engine error codes)
6.
7. </TD></TR></TABLE>

Depends what the cel's are. And I think its 20 mph

skiracer8148

im not having no problems with my car,but i was just wondering.idk about the 20mph thing because i used to have vafc and it lights up when vtec engages and it would light up if u rev it when parked

egsir2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by skiracer8148 &raquo;</TD></TR><TR><TD CLASS="quote">im not having no problems with my car,but i was just wondering.idk about the 20mph thing because i used to have vafc and it lights up when vtec engages and it would light up if u rev it when parked</TD></TR></TABLE>

i have a chipped p30 tuned with crome. i removed the speed check and now vtec engages when i rev the car when parked up. completely pointless,but you can clearly hear it enagaging,its kinda cool............in a not so cool kinda way....

Syndacate

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by white ex &raquo;</TD></TR><TR><TD CLASS="quote">It either works or it doesn't.</TD></TR></TABLE>

Yes, let's get this off right.

VTEC is 100% BINARY

It is either ON, or OFF.

There is NO middle ground. No "weak" VTEC, etc., either on or off.

Your friend that told you this is a ricer .

9200RPM

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


Your friend that told you this is a ricer .

</TD></TR></TABLE>

ive been seeing more and more of "those we dont speak of" lately....i remember when i got into this there werent that many...why cant those days return...

SlammedDC2

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by KLiK &raquo;</TD></TR><TR><TD CLASS="quote">
5. no CEL! (or no engine error codes)
</TD></TR></TABLE>
It depends on the CEL, I've had CEL's for secondary O2 and MAP and still had vtec, but those are the only 2 CEL's I have ever had

KLiK

VTEC it's not supposed to run on no output...the problem is that around 7-8000rpm inertial forces on the cilinders become dominant!! that means that it could easily get over-reved...


2SlammedDC2:
well that is beacuse the VTEC doesn't need the O2 sensor imputs in VTEC...and it can run without MAP, 'cause VTEC is predefined with maps!!