Hello,
I have big problems with my VTEC, smetimes it kicks in, but usually dont.
I think i tryied everything... VTEC solenoid changed and cleaned, EGR changed and cleaned, oil changed, ECU doesn't shows any errors. So where could be problem?? please help
Car Prelude 4Gen H22A2 engine (EDM, 185 HP)

 

does is throw a check engine when it dosent kick in?

 

Nope, there is no ECU errors.

 

check ur oil pressure and is ur speedo working properly?

 

Speedo doesn't works perfectly, but i thing it shouldn't affect VTEC, because when im going on 20km/h it shows 0km/h, on 40km/h it shows 20km/h, on 60km/h shows 40 and ect..... i think it can affect'VTEC only on first gear, but on second gear when speed more than 50-60km/h VTEC doesn't kicks in too
P.S. How to check oil presure? I think if oil presure would be low, the ECU should show an error....

 

replace the o-ring in the center cam cap

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ImmOr7aL &raquo;</TD></TR><TR><TD CLASS="quote">
P.S. How to check oil presure? I think if oil presure would be low, the ECU should show an error....</TD></TR></TABLE>

to a degree your right. But you can also not have enough oil pressure for vtec and still have no error lights. Check your oil level and check for oil leaks.

 

check your oil pan for a dent. had this problem before and the dent caused it making oil pressure to the head inconsistent.

 

Oil level at the top.....

 

Could you explain me what is a dent? Because my English is not very good

 

The oil pan is dented when you hit something and the metal is pushed inside of the pan.

 

Everything looks fine... Can someone give another advice??

 

run though this thread
https://honda-tech.com/zerothread?id=830163

Gavz

 

yes ur speed sensor does effect if vtec will engage, u have to be over 20mph for vtec to engage so if ur speed sensor is not working thats ur prob.

 

Thank you, but i forgot to say, that motor reving past 6400 rpms, til 7000 or even 8000 rmp, but sometimes there is Solenoids click on 5000rpm, and i can feel and hear VTEC, and sometimes there is nothing, engine just reving 6400rpm, but there is no VTEC
Edit: Oil pan is really dented, will try to change it.
Thank you for advices


Modified by ImmOr7aL at 2:17 PM 10/25/2007