my oil light tuns off and on when i first start it then it goes away and comes back on every now and then? My vtec pops at 5500rpm in first gear and every other gear it pops at 5900 and 6000 sometimes. It feels like it lacks power the only time i feel the power is when my vtec is on? Im using a p30 ecu? Can anybody help or have any tips?

Oh yeah im also throwing 23 check engine which is knock sensor i believe.

 

uh oh, you've got some bottom end bearings going bad it sounds like. that would explain the knock sensor, they might have enough play in them to lose oil pressure (which would cause your VTEC to go off later - taking longer to build up the necessary oil pressure to activate VTEC), and possibly the play causing the rods to knock enough to set off the knock sensor. that is pretty much exactly what my old d16z6 did when it's rod bearings were on the way out.

 

there is no knocking on the bottom end. and i forgot to tell you that the knock sensor plug is broken so i dont even have it plugged in.

 

Check your oil pan. When I first got my swap, B16 in an EG, had the same problem, but my oil light would stay on till my car was fully warmed up. That would explian the oil light and the weird vtec cross overs. A stock P30 should kick over at 5800. Also, with the broken knock sensor, Ive heard that it doesnt do anything, but then I have also heard that it retards the timing. I also broke my knock sensor and drove on it for a longggg time. Finally I ended up replacing it and i swore I felt a difference. But it could have all been in my head. Try replacing the knock sensor and check to see if the oil pan is dented. If so, replace it and buy a oil pan gasket and your set. Good luck!

 

my friends Gsr was doing that and it ended up bieng the oil pump

 

was it doing it for awhile my car has been doing that for about 3 months.

 

thanks for the info. do you know where i can get a tranny i have an ls and when i shift it falls out of vtec for a little bit.
do you think it could be my oil pump by any chance?

 

falls out of vtec?? wtf is falling out

how can you tell??

 

and vtec doesn't always engage at the same rpm.

There's different engagement and disengagement points depending on speed and accel factors

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 1990efeight &raquo;</TD></TR><TR><TD CLASS="quote">there is no knocking on the bottom end. and i forgot to tell you that the knock sensor plug is broken so i dont even have it plugged in. </TD></TR></TABLE>

Ding Ding Ding.... we have a winner

Not having your knock sensor hooked up with the p30 ecu ( BTW looks for the knock sensor) will cause your car to run in a limp mode. You are prolly arent getting great gas mileage either. Cause the knock sensor monitors the knock ( DUH!) so if it cant read the sensor it will go into a limp mode and dump extra fuel in the CC just to be safe. this will also happen when you have a bad O2 sensor. But if you try to engange vtec within a few minutes of start up that could be a problem.

In order to Engange in Vtec your temperature should be up a lil and you must have at least 55 psi of oil pressure for vtec to properly engage.

So if you want to have your car run better get a new knock sensor. if you dont want to do that you only other option is to get a Chipped p28 which in most cases hurt gas mileage but do help performance wise.

 

since i have a ls tranny when i shift to third gear the rpm is at 5400 rpm so when vtec isnt activated until 5800 rpms again!!!!!!!!!!!!!!!!!


ive seen your other posts you are one of those people that always has something smart to say!! do you think your cool or something i bet i have more knowledge than you. that ive done alot more swaps than you too !!!!

so next time you post something i think you should be a little bit more respectfull to everybody on this forum!

 

what does your transmission have to do with vtec activating? i doesnt matter what tranny you have. its all controlled by the ecu. BTW i am intellegent when it comes to honda's and im sure everyone in the forum would agree that im a nice guy. i help out alot of people. ive done several writeups on here. and uve been here what a whole month? I help this forum with all i can. and i do not put misleading information in my post.

 

no you got all wrong dog i was talking about slamdlscivic gut who ever he is!!!!!!!!!!!!!!!!!!!!!!

 

i have an LS tranny. my vtec activates at 5800rpms, when i shift from 2nd to third my rpm is at 5500 rpms so the vtec is not activated until it hits 5800 rpms again.
that post wasnt to you i should of been more specific my bad but thanks for the help you have gave me. peace out!!!!!!!!!!!!!!!!!!!!11