99.5% complete on project but need help. Vtec problem not a noob question.

[MADMAX]

Ok so my cars all put together its running but,
there's a problem with the VTEC.?
...... When the Vtec gets ready to engage its like it hits a rev limiter (we'll call this hitting the wall) The rpm bounces a little and doesn't go anywhere. Just like your regular rev limiter if you let your car rev too high.
....Also I have the vafc (was doing the same thing before it was hooked up) so I can change the VTEC engagement point so its not just a certain rpm. So when the engagement point is at 4000 it hits the wall at 4000, if you let it til 6000 it hits the wall at 6000. If you put the engagement point to 7000 and don't let it engage it runs fine its jut the Vtec that has a problem?
..Another thing I noticed is when I had the Vtec at 6000 and it hit the wall when I shifted to third the gear it hit the wall at 4000 even though the Vtec wasn't kicking in.

... Here are the things my mechanic has tried or ruled out. Checked over the wiring three times after it was all hooked up. Put the Vafc on to richen the fuel mixture in case it was leaning out on Vtec. Switch computers with a p28. There is a brand new dizzy from the dealership.
... Things he's going to try take off and inspect Vtec solenoid besides that he doesn't know what it is and is convinced that it is something mechanical not electrical.
..So I need help if anyone has any insight please share. The more time he takes to find the problem the more its going to cost me, so if someone has a solution I could just pay to have it fixed and finally have my car.
here's MY MODS

[JDMCB3Si]

Which ecu did you have on it? and which motor?

[d112crzy]

umm, do u have the ecu for that engine?(hey, i c u joined over here now. lol)

[rebels]

he said he is/was using the p28, and if you read his mods it says jdm h22a.. but i don't really know the answer to your problem. possibly try not using the vafc and seeing if there is a CEL? the motor could be running in limp mode, which caused mine to do the same thing yours is doing.

i later found out my ECTS was bad.

[h22sparkle]

put the wires normally as if you where runnin without the vafc. Then check for codes that the ecu is shooting off by jumping the connector on the ecu output jumper on the passengerside kickpanel. It should look like a blue connector with a plug in port that you can plug into. Then check for the code that it shoots off. Then make sure your wiring is is correct,oil is at level, and coolant is at level. Then hit us back on the net, keep us posted

[MADMAX]

I'm running the p13 my mechanic put the p28 to see if my ecu was bad. The problem was going on before he put on the VAFC. The reason he put the VAFC on was to richen the fuel mix. He thought it might be leaning out at Vtec. Also it wasn't throwing a cel before or after the VAFC.

the motor could be running in limp mode, which caused mine to do the same thing yours is doing.
i later found out my ECTS was bad.

Could you explain more about the limp mode, and what a ECTS

[TheTempest]

Limp mode is a safe mode that your computer goes into when you have a check engine light (CEL). It's designed to keep your engine to last. It basicly doesn't give you as much gas as it normally would, set's a rev limiter in place, and as I've found out sometimes depending on which code it is, will totally NOT allow VTEC to engage.

I was throwing CEL 8/12 (TDC/EGR) and it wouldn't let VTEC engage (it was the 8, because I've run with VTEC and had the EGR CEL).

Hopefully that explains something.

Good luck.

[92ex]

see, when I was in limp mode, I was running mad rich. So rich I fouled out my plugs within 3 days. My CEL was for the tps.

MADMAX, glad to see you finally got your password. You haven't been on much over at accordracing.com

[MADMAX]

....First I want to thank everyone for ther help and suggestions
Next I just want to clear some things up to help narrow the responses more towards the problem.
....1) The problem was happening before the VAFC was hooked up. The VAFC was hooked up to richen the fuel mixture thinking that it might be leaning out on Vtec.
.....2)It's not throwing any CELS and I replaced the bulb awhile back and always keep an eye on it.
.....3) I don't think it not engaging is the problem. Because I have been in cars where the Vtec doesn't engage and its nothing like this, also it doesn't limit the RPM when it doesn't engage.
.....4) Don't forget my mechanic is working on my car not me. He is one of the best in my area. He works on about 80% Hondas w/Vtec so I'm pretty sure he has tried all the basics even though its good to start checking those first. He also has done H22 into Accords numerous times thats one of the reasons I went to him.
......5) Yes I'm driving it for the testing of it.
Again thanks for everyone's help.
By next week I will have a digital camera that takes video for something for you guys to see how it is. Also the Vtec solenoid should be checked and cleaned out so we'll soon see if that is the route of the problem.
:firedevil

[MADMAX]

~bump~

[MADMAX]

I'll be going up there to see my car monday. I'm going to take some video so you guys can see but unfortunately my camera doesn't record sound.

[MADMAX]

We may have found the solution mechanics going to test it out next week. The Vtec solenoid might not be getting enough oil pressure. The cause the oil cooler. So he's going to put a oil pressure gauge on the head. Hopefully that is it if so he just has to take the oil cooler off and have it next week.
I have video with no sound but its 17MB so I have to find another website to share with you guys.
By the way if anyone knows of any websites to show video on the forum please post.

[MADMAX]

Hopefully this works let me know
Read before you Watch!
In order to watch please
(1)Click on link,
(2)scroll down and click free,
(3)scroll down and click PICT0021.MOV
That should work. ( I'm new to this)

http://rapidshare.de/files/3064380/PICT0021.MOV.html

...If it works you'll see the VAFC set to 5200 then the Rpm hold right there.
REMEMBER THERE IS NO SOUND

[TheInfamous]

yo try changing out the vtec solonoid, use a tester that is sure to work...

[MADMAXX]

yo try changing out the vtec solonoid, use a tester that is sure to work...

Been there and done that. You take a look at the video?