I was wondering if an inop VSS will hurt your performance. Mine is inop and I have no speedo w/ a CEL. It feels like its not running the same, and I didnt know if it was just me. Any input would be appreciated, thanks.

 

My ls has a non-running VSS and it seems good...only thing is I now no longer know how many miles I have put on my car

 

I wasnt sure if the ECU used that sensor for timing advance or anything important of that sort. It just feels like my car has run crappy since the CEL came on for it after i broke it.

 

I don't believe the speed is used for the timing..considering the timing is set at idle..make sure that the cam gears both match the same direction..

 

ure vtec wont work without a properly working vss.

 

well..vtec engages according to the rpms and not the speed so it should still engage...my VSS does not work and the tach. still functions.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98IntegraLSNonVtec &raquo;</TD></TR><TR><TD CLASS="quote">well..vtec engages according to the rpms and not the speed so it should still engage...my VSS does not work and the tach. still functions.</TD></TR></TABLE>

Everything that I have read, says that a minimum speed must be reached before the VTEC system will engage. The VSS is needed for this.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by geezer_187 &raquo;</TD></TR><TR><TD CLASS="quote">I was wondering if an inop VSS will hurt your performance. Mine is inop and I have no speedo w/ a CEL. It feels like its not running the same, and I didnt know if it was just me. Any input would be appreciated, thanks.</TD></TR></TABLE>

What CEL is stored?

https://honda-tech.com/zerothread?id=978933

 

vtec is engadged by oil pressure

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by teggy182 &raquo;</TD></TR><TR><TD CLASS="quote">vtec is engadged by oil pressure</TD></TR></TABLE>

Yes, and the ECU sends a signal to the VTEC solenoid to allow this oil pressure to reach the rockers. The VTEC will not function without the VSS with a stock ECU.

 

Thank you for all of your input. To be honest, it feels as though my high rpm's are very sluggish, but the sound of the butterflies in the intake opening made me think I was crazy, considering I couldnt hear vtec engage in the first place, but I guess if its not engaging it would explain why my car is running like butt.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Dogginator &raquo;</TD></TR><TR><TD CLASS="quote">Yes, and the ECU sends a signal to the VTEC solenoid to allow this oil pressure to reach the rockers. The VTEC will not function without the VSS with a stock ECU.</TD></TR></TABLE>

this is correct

 

Thank you guys, any other input?

 

Dogginator is right!!! with everything he said

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by geezer_187 &raquo;</TD></TR><TR><TD CLASS="quote">Thank you for all of your input. To be honest, it feels as though my high rpm's are very sluggish, but the sound of the butterflies in the intake opening made me think I was crazy, considering I couldnt hear vtec engage in the first place, but I guess if its not engaging it would explain why my car is running like butt.</TD></TR></TABLE>

yeah you have no vtec buddy... fix the VSS like dogginator said earlier!

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 98IntegraLSNonVtec &raquo;</TD></TR><TR><TD CLASS="quote">well..vtec engages according to the rpms and not the speed so it should still engage...my VSS does not work and the tach. still functions.</TD></TR></TABLE>

yeah.. I can tell you drive an LS..

 

ok this is all the true stuff....

vtec will only kick "IF and ONLY IF":

speed is at least 20 mph (based on vss imput)
oil pressure is X amount
rpms are X amount
and throttle is at X amount


no vss no vtec
oil oil pressure sensor no vtec
no position sesor(for the rpms) no vtec
and finally no tps no vtec


the butterflys are not based on speed they are based on rpms only so you should still hear those around 6k i think.

 

my VSS was off for a while and i DEF had Vtec.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by teggy182 &raquo;</TD></TR><TR><TD CLASS="quote">vtec is engadged by oil pressure</TD></TR></TABLE>
oil pressure is only one of the conditions that must be met in order for vtec to operate.
rpm, speed, the car being in gear (not neutral), and engine temp are all factors.

 

Installed my new VSS. Finally have a speedometer, and my vtec is finally engaging. Its been about 6 months since I've had it, and I almost forgot what it was like! Thank everyone who gave me the right info, I owe ya one!

 

indeed mad vtec was hit. cant wait till i get my c1 head.