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    #1

    VTEC Issues

    Hey guys, been having a few issues with the teg, and i can't figure it out whats causing it.

    Basically it all started at wakefield. Went down with some friends for the day and when i went on for our session, everything was fine for 2 laps, then the lap after that the car started studdering. VTEC would cut in and out at high RPM, and then not kick in at all. So i brought it back in and tried to find what was going on. Oil was a little low i thought that was the culprit. So i topped it back up and went out for the second session. Same thing happens. I then went out on the 3rd session, paying more attention to my gauges. I noticed that when oil temps were at 80 deg, everything was sweet. At 90 deg, vtec would struggle and at 100deg, vtec will not engage.

    So far i've brought the car home and done the following.

    Changed engine oil (OEM 10-30)
    Cleaned VTEC solenoid with degreaser
    Tested the solenoid by putting a 12v power through the plug, actuator clicks upon power (so i assume its working)
    Reset ECU
    Changed battery (had a weak crank due to dead battery but i thought i'd note it here)
    Replaced Spark Plugs

    Details of the car.

    99 Type R
    282,000kms (yes she's quite old)
    Simota CAI
    Xforce 4-1 headers
    Mugen Twinloop Catback
    Earls 13row Oil Cooler
    Relocated Oil filter
    Oil temp/ Oil Pressure / Water Temp gauges
    Does burn a little oil, have to top up about 500ml oil every 3 weeks or so.
    Suspension mods and stuff but I don't think its relevant.

    I'm going to check for codes tonight from the ECU as suggested from a friend, but if anyone could point me in the right direction into what to check next would be really appreciated

    *Update 21/12/2012*
    added pictures of engine bay







    Last edited by Fallenangel; 21-12-12, 08:14 AM. Reason: added pictures
    Tags: None
    #2
    VTEC Issues

    10w30 is a bit thin for summer esp if your tracking. It will heat up and lose viscosity and Therefore lubricating properties.

    A lot of members recommend 40 weight.

    Comment

      #3
      Place a oil pressure gauge and montior oil pressure.
      BYP Racing & Developments
      Built. Tuned. Driven
      Want to go fast? Come see us! e: jimmy@bypracing.com ph: (02) 9757 4757

      Comment

        #4
        ditch the oil cooler / relocator check for oil leaks.

        Comment

          #5
          you need to tell us about your oil pressure monitoring, what was happening to OP on the track?
          ... retired/

          Comment

            #6
            VTEC Issues

            What were the readings of the oil pressure?

            Edit: tink just beat me to it. Vtec works off oil pressure.

            Comment

              #7
              Oil pressure was up at 90-100psi at WOT, sounds about normal right? Didn't drop at all
              I'm planning to change to 10-40W if i need to drain my oil.

              Comment

                #8
                Oil cooler isn't leaking, sandwich plate is also clean, lines are good to the block. Although i think i do have a leak somewhere else cause i can see oil near my driveshaft.

                Comment

                  #9
                  Has the engine been opened recently?

                  Comment

                    #10
                    Originally posted by Fallenangel View Post
                    Oil pressure was up at 90-100psi at WOT, sounds about normal right? Didn't drop at all
                    I'm planning to change to 10-40W if i need to drain my oil.
                    Mine hits 80-85 at 3000 -4000 rpm and doesnt rise any more!
                    sigpic
                    128.8kw Atws @ 1065kg - 13.875 sec @ 100.26 mph http://forum.clubitr.com.au/showthre...ion&highlight=

                    Comment

                      #11
                      Originally posted by rookie View Post
                      Has the engine been opened recently?
                      Engine is dead stock. Hasn't been touched nor opened

                      Originally posted by Karl View Post
                      Mine hits 80-85 at 3000 -4000 rpm and doesnt rise any more!
                      Mine rises up to about 95-100 psi at 8000rpm. Would that be a problem though? Had these pressures and higher temps before and it worked fine.

                      Comment

                        #12
                        VTEC Issues

                        Is your sump damaged? Dented

                        Comment

                          #13
                          Originally posted by dorikin View Post
                          Is your sump damaged? Dented
                          excellent question!
                          ... retired/

                          Comment

                            #14
                            Originally posted by Fallenangel View Post
                            Oil pressure was up at 90-100psi at WOT, sounds about normal right? Didn't drop at all
                            I'm planning to change to 10-40W if i need to drain my oil.
                            Where is that oil pressure measured?

                            Comment

                              #15
                              Originally posted by dorikin View Post
                              Is your sump damaged? Dented
                              Sump has been scratched but no dents.

                              Originally posted by ChargeR View Post
                              Where is that oil pressure measured?
                              Oil Temp/Pressure sensor is in the sandwich plate and the back of the block

                              Comment

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