Comptech SC problem - Page 3

nizmot · 05-12-2009, 01:20 PM

NO VTEC here 2

At least we have found the problem. After the realocation of the knock sensor the VTEC not kicking is the problem.

It doesn't kick even without unichip. Any suggestion?

matiasneto · 05-12-2009, 03:13 PM

is the check engine light on

nizmot · 05-13-2009, 03:49 PM

The engine is in temperature, we have planty of oil. The VTEC valve works. The small filter(the one that goes to the VTEC valve) is clear. And we have NO Check light.

I'm going to buy a new fuel regulator to see if the VTEC kicks we stock settings.

Jeremiah · 05-13-2009, 04:00 PM

Question, is the signal to the solenoid being sent from the ECU? I would check this first.

nizmot · 05-13-2009, 06:08 PM

Yes it gets it as it should.

THX
Anymore?

audioserf · 05-14-2009, 01:16 PM

I'm waiting for a new ACM from Comptech to see if that fixes VTEC. If it doesn't I may just sell my car. I'm tired of this BS.

H22A_CD5 · 05-14-2009, 01:31 PM

Quote:

Originally Posted by nizmot

we have planty of oil

What about oil pressure? that is one of the conditions that has to be satisfied for VTEC to engage. There could be a blockage somewhere inside the block that is restricting oil pressure reading to the sensor, or keeping enough oil from flowing into the VTEC sol. I wouldnt wish this problem on anyone, but it is still a possibility.

You may still have oil pressure issues even without a warning light. I know on non K motors the light doesnt come on until a "too late" 3-4 psi. And if i remember correctly VTEC reqires 20-30 psi.

Jeremiah · 05-14-2009, 02:28 PM

Well, all I can say, is that vtec relies on certain variables to be met, and as you say you've checked everything... all I can say is you've missed something. Go back and do it again... and again... and again until you get it.

I ran into several issues, a bunk ecu, and a bad conversion harness on my turbo 98 accord... but when the issues were worked out, it was tons of fun.

Engine must be at operating temperature... MAP signal has to be XX and so on... The map could potentially have vtec disabled...

On crome with p28 you could tell vtec to ignore everything... and it'd kick on so long as oil pressure was good.

IF you had made no changes, and vtec worked before, I doubt it's a mechanical issue.

nizmot · 05-21-2009, 07:09 PM

One question do u here the VTEC engaging with the compressor?

We have plenty of oil, we have more than 80PSI of oil pressure. There is more than 12V on the VTEC valve. The valve works, we checked the VTEC mechanism and works(air). I can see the pin going out.

WTF?

Jeremiah · 05-21-2009, 07:21 PM

With a turbo, it is quite subdued, but with a supercharged lude it was rewangulously loud. With a turbo, you could see on the dyno when it kicks over, and the tone of the motor would change oh so slightly.

You will NOT hear the intake vtec cam kick over, as it is muffled by the blades in the compressor. You would only hear the exhaust side, and that most likely only if you have an exhaust/header setup. The pitch of the motor should be slightly different also when the high cam comes into play, but it takes a tuned ear.

Most people (not honda people) don't even notice the pitch change in the old H and B series engines, but when I am cruising along and someone is dogging a lude of gsr you can hear the cams kick over... it is sweet sweet music. (assuming it's a decent exhaust setup)

nizmot · 05-21-2009, 08:09 PM

I have a custom exhaust/header that changed a lot the performance.
At first only me(or the driver) would hear it. Now everyone hear it. But now nothing happens. Tomorrow I am getting it to a local Honda dealer(a good friend of mine works there) to see if their TESTER will find anything.
Next thing I am calling Comptech. I hope we fix it with the help from the TESTER

P.S. The muffler is like the one used on motorbikes like 600 and 1000ccm.

Will post tomorrow.

Good night