now i know this is a EG question but before i get flamed for it, this is not my car and am just curious.

my friend has a 94 civic EX with a D16Z6 and P72 ECU

all u guys say "u can 'feel' VTEC kick in and 'feel' the car pull harder" well that doesent happen. i mean absolutily no change. i hooked a scantool up to it and it says it's operating at 4200 RPM. is that correct for a P72?

what could cause this? he has plenty of oil presure. infact we shorted the spool solonoid to +12 and the car ran like ****. like not getting enough fuel.

 

sohc vtec doesn't have a big kick. A lot of people claim it's hardly noticable.

 

Sohc vtec will not kick in as strong as the dohc vtec. There should be a difference when vtec does crossover though. Should be a difference in power and noise.
Check the Vtec solenoid. See if that's still good. Also check wiring.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by njn63 &raquo;</TD></TR><TR><TD CLASS="quote">sohc vtec doesn't have a big kick. A lot of people claim it's hardly noticable.</TD></TR></TABLE>

i'm glad u told me that b4 i got a sohc swap

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boosted Power &raquo;</TD></TR><TR><TD CLASS="quote">There should be a difference when vtec does crossover though.</TD></TR></TABLE>

and when is that? 4200 right?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boosted Power &raquo;</TD></TR><TR><TD CLASS="quote"> Should be a difference in power and noise.</TD></TR></TABLE>

theres abolutly none at all. no change. it dosent even pull harder. how is it supost to sound? deeper?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Boosted Power &raquo;</TD></TR><TR><TD CLASS="quote">Check the Vtec solenoid. See if that's still good. Also check wiring. </TD></TR></TABLE>

we did. hooked it up to +12 and it ran like ****. besides if there was a wiring problem we would get a CEL witch were not.

 

on my friends sohc vtec we can't hear vtec and his motor's healthy... my vtec sounds...vrooommmmm Vtec :bhhua, but i have a b16 so sounds diff then a single cam atleast IMO

 

yeah my friends sohc vtec doesnt sound too lous when vtec engages....hardly tell. but yeah b16 sounds so sweet when vtec kicks in....pulls hard too

 

hehe, sounds good for me since im looking forward to a b16 in a couple months

 

vtec equals eeeeeeeeeeeeeeeeeeeeeBAAAAAAAAA

 

sohc you cant really hear it, but if you disconnected the vtec you can tell that its not pulling as hard to the redline.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DieMaster &raquo;</TD></TR><TR><TD CLASS="quote">my friend has a 94 civic EX with a D16Z6 and P72 ECU</TD></TR></TABLE>

You do know that the Z6 is suppose to be running a P28 ecu. The P72 ecu is for the GSR motor (B18C1), not the D16Z6. The p72 is designed to run dohc engines. If it is running the z6 and it is not chipped, there is your problem. If the p72 is chipped and designed to run the Z6 then here is a link you need:

https://honda-tech.com/zerothread?id=830163

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mach69 &raquo;</TD></TR><TR><TD CLASS="quote">

You do know that the Z6 is suppose to be running a P28 ecu. The P72 ecu is for the GSR motor (B18C1), not the D16Z6. </TD></TR></TABLE>

ur right it's a P28 ECU. it's totaly bone stock. i was thinking of P72 when i wrote that

so is 4200 correct for a P28?

 

i think stock engagement for p28 is 4800

 

Yeah SOHC VTEC sounds/feels nothing like DOHC VTEC

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DieMaster &raquo;</TD></TR><TR><TD CLASS="quote">so is 4200 correct for a P28?</TD></TR></TABLE>

No, but 4800 is, and depending on other factors, like throttle percentage, oil pressure, etc. It can be as high as 5200 rpm.

Make sure you aren't throwing codes and check the thread I have in my other post.