Hi, guys.

I'm having real trouble with the VTEC on my 2002 RSX Type-S.

Several months ago I brought the car in for servicing. When I got the car back, it was all messed up at high revs. Since they had done an injector cleaning, and since in the pre-VTEC rpms the car was fine, I thought maybe it would take a couple of days to clear up.

It never did.

As the car would move up the revs the VTEC would either engage at odd RPMs or not engage at all. When it did engage, either the oil pressure dropped or the ECU cut fuel at around 6,900 to 7,100 rpm. I recently found a couple of posts about this exact scenario, but the follow-ups were missing.

I showed it to the dealership but the test runs were inconclusive and the results varied. They claimed maybe my RPM readout was off and I was really readlining at 7,100. Eventually I ended up resetting the ECU myself (pulling the 15A fuse) and that appeared to have solved the problem. The VTEC now engaged exactly at 5,900 rpm and stayed on until the redline.

Suddenly being unhappy with the performance I started adding parts: V2 intake, a header and a cat-back exhast. Something definitely wasn't right. The power just wasn't there.

I've come to see that although the VTEC engages correctly (I can easily hear it) there seems to be no additional power associated with the VTEC region of the rpms. So it's all noise and no power.

The car has been at the dealership since Wednesday and they claim to have gone through everything that was suggested to them except replacing the ECU. That should be delivered to the dearlership early next week.

Has anyone heard of this before or does this make any sense to you guys? What would mechanically/electronically have to happen for the VTEC sound to occur without any of the horsepower being generated?

I have no metrics at this point, but if this ECU replacement doesn't work I'll dyno the car to get some solid data behind me. I have also not tested to see if the +12Vdc on the VTEC engagement wire comes on or the GND on the sensor wire is present, but I could check those when I get the car back. The car just had an oil change with Mobil1 synthetic and is at the correct level. The check engine light has never come on so I have no CELs to provide. The only other problem I've had was that I picked the car up at the dealership and the revs kept bouncing between 500 rpm and 2,000 rpm with no end in sight. They fixed it and gave it back to me the next day.

So any ideas on what the mechanics/electronics of this scenario could be? I'm really at the end of my rope here and any help would be really appreciated.

 

eh, it's said that the v2 intake doesn't give much gains ...

what header and exhaust did you get?

 

dam dude that sucks, i hope you get your **** fixed

 

Find someone with another Type S, ask if you can ride in their car or drive it. It sounds like the dealership is giving you the run around, watch they dont void your warranty because of the bolt ons you have.

 

are you pumping the right gas?

 

best way to tell is to prolly race another type-s. yeah yeah street racing is bad and blah blah blah, but in reality thats prolly one of the only ways to tell if ur car is not performing up to standards. on another note, could it be that your just a major tweaker, i know i was at some points when i drove my car. id tweak and think it was slower than b4. lol

 

Thanks for the comments guys. I'm using 91 octane gas. I hear what your saying about being over sensitive, and that's why I let it go so long, but recently I had several people try the car (including other Type-S owners) and they agreed. And there really is no performance difference what-so-ever between the non-VTEC and VTEC ranges of the RPMs. That can't be right, can it?

 

its the injectors they could have messed up with them it has to be injectors sending the wrong signal to ecu when vtec hits more fuel should be added it isnt adding no fuel no hp gain nuttin` tell acura to test the fuse for fuel pump and test individual injectors that will help

 

vtec engages at 5300 on a 02 type-s, not 5900.

 

Vtec engages on at 59oo rpm not 5300 rpm. A stock ecu on a 02 type S will engage in vtec at 59oo rpm.

Hondata reflash is what allows you to lower your vtec point to 5300.
So to correct you, stock ecu will engage vtec at 5900.

 

whoops my bad. nvm.