crazybaboon6000

First off, my car is a 5AT with 9.5k miles on it. I was on my way home from school yesterday and i decided to VTEC down my street . I hit VTEC and then took my foot off the gas pedal. I noticed that my car stayed at 4k RPMs and didnt downshift to another gear even when i pushed the gas pedal again. This seemed slightly odd to me, but i didnt think much of it at the time. This morning i was driving to school, and i was late, so of course i tried to ride VTEC a few times to school. I reach the VTEC rpms, and instead of hearing the slight pop and rush of acceleration which VTEC provides, i heard nothing and barely felt any extra acceleration even when i brought it to redline. I thought this was odd, so i tried again with no success. I put it in sportshift mode, and tried a third time, and still nothing. I still feel a very slight increase in acceleration, but nothing like regular VTEC. Any thoughts on what could of caused this and how to fix it?

Reach

Your car is fine, you're not gonna 'break' vtec with a few hard runs, especially on full auto.

If you really want to rev, use the sport shift mode and watch the RPMs. vtec comes in at 6000rpm, not 4000.

crazybaboon6000

i revved it all the way to redline in SS mode, and VTEC still didnt engage. Im aware that its supposed to come in at 6,000 RPMS and not 4,000. It didnt come in even when i redlined it. Trust me, i know my car, and my VTEC is DEFINATELY not working right

aaronng

If your temperature needle is not at the middle, then vtec won't engage. BTW, that is the least of your worries. If you were going past 6000rpm with the temperature needle below 1/4, you're causing more damage to the rest of your engine.

curls

Exactly.

VTEC needs oil pressure, operating temperature, throttle position, and a few other things (?), to be in the correct ranges, for it to engage.

PWPTSX

one cold engin.............redline................very baddd

synthetic

There's something wrong. Take it to the dealer. This could have many reasons. I just hope you haven't hurt your camshaft(don't worry, it doesn't happen often)

Tex929rr

Yes, you need to get it fixed. Then you can arrive at school earlier and get to english class.

drkabe

A little experience from my 04 AUTO: I was not able to reach VTEC easily with auto mode, even with SS mode, vtec boost wasn't and IS NOT convincing as my current 6MT.

After Hondata, header, Intake : SS mode was only able to achieve VTEC on 1,2,3 but 4th would be stuck @ 4000 rpm and 5th - 2000rpm.

I only had first 3 gears to play with and by the time I red line 3rd...I am over 100mph!!! yeaks.

Thank god I made the right decision.

CJams

cough cough iVTEC cough cough

EuRTSX

Warm up your car fool. Stop killing your car.

EuRTSX

Trust me, you don't know your car.

luigilee

so I just got my 06 tsx manny... 800 miles so far... but I'm not going to push it till the weather gets warmer and after some more easy runs (even though break in period is at 600 miles).

my point is.. how does ivtec feels like?

mltk53

louder, faster. u get that lil boost

Ellas9

How did you feel a rush at 6000rpm (was it a TSX or a Type R Integra?) - there's no "rush" feeling in the stock K series. Just maintains torque. Even with your coolant temperature at "normal" (~mid way); your oil temperature is still likely not warm enough. You need at least 15-20min of driving, depending on exterior temp., with mulitple rpm and gear usage to bring the oil temperature to the correct operating level. Just be glad your driving at 17 - I was walking on two hairy Greek legs!

badstsx

Your tripping. No matter what car you drive you never floor it or go past a certain RPM when the engine is cold like that.

crazybaboon6000

There is most certainly a rush when VTEC engages, i dont know what you're talking about. And i forgot to state that the engine wasnt that cold because of two reasons. One is that i live in miami, so always pretty warm outside, and two is that i pulled my car out of my garage that morning and realized i forgot to grab a few books so i left the car running and ran back inside to grab them. That took about five minutes, and i didnt even try to engage VTEC until about 10 minutes after that. My car had plenty of time to warm up the engine. My VTEC still isnt working properly and ive driven it 40 miles since this thread started.

EuRTSX

I think you're delirious.

prelude358

I would check for the oil level first.Since v-tec use oil pressure.Low level oil,your v-tec won't engage.

crazybaboon6000

And i think you're an ass If you dont beleive i have a legitimate problem, and you have nothing constructive to offer, please dont post in this thread.

crazybaboon6000

Yeah, i thought about that too so i checked the levels, my oil is kind of low. Im going to the acura dealership soon anyways to get a speaker replaced, so i think im just gonna get the whole car looked at while im there.

EuRTSX

Got a problem? Take it to the Problems & Fixes section. You're gonna get nothing but opinions here. You got mine, end of story.

hyun

im pretty sure vtec isnt a verb

EuRTSX

junktionfet

My '06 normally has a very noticeable boost in power at 6000 RPM--meaning that something changes rather dramatically with the torque and horsepower the engine is producing. It is my understanding that the earlier TSXs didn't have a such a pronounced boost and were perhaps a bit more seamless in operation.

The author of the thread has an '06, so this may explain why he notices the effects so readily.

subdued

Damn, I looked all over and can't find my VTEC button.
Help!

stogie1020

Hey! My VTEC works in REVERSE!! Cool.

Xtremespeed2102

your broken. just sell the car

aaronng

If your oil is low, top it up NOW.

ChrismanTSX

i can feel the boost in power north of 6K on my '06 6MT, not just a continuation of the power curve. However, that is when the engine is warm, oil is OK, etc. I wouldn't dare kicking the iVTEC on a cold engine

TSX420J

I think you might not be noticing the vtec engauging. I barely notice it on mine but I know it is there. At 6000 it happens so quick that you are already at 6800 and barely notice anything. Plus it is smooth and not much of a difference than when it is not engauged. Just take it in and have the steelership look at it. I know I can see nut not feel it. Just look at your rpms and see how it will climb slightly faster at 6000.

Ellas9

key word: "rush". Ever driven an NSX a Vette or even a Type R Integra....that's a rush; the i-VTEC DOHC engines (even the Type S in the RSX) don't really deliver a rush.....a difference in feeling...yes, I would agree....not a rush!

As for taking the car out of the garage in Miami, FL. Do you understand what 6000rpm means...can you imagine the heat developed when the crank turns that fast - who cares if its 45C outside....were talking about a low tolerance engine generating heat - one guy here said it right....you may be low in oil - Check that!

clee109

Get the hondata reflash if you "need" more vtec

clee109

Plus on my 06 I never felt vtec fully engage until 4,000miles on the odometer, it's my understanding that this is the "break in" period and that vtec wont engage the same until you pass the break in threshold, then again this could be just some wives tale I conjured up. However; on my 06 manual vtec was pretty pronounced at 6K, then I got the hondata reflash and vtec kicked in at around 4800 rpm, but the crank is not made to maintain reliability running vtec from 4800 to redline so I take it easy. Plus like everyone has said on here the oil temp, level, and engine temp have to be right. Letting your car idle for a while does not constitute the proper oil temp, maybe engine temp, but not oil. Also as a number of users have said, running the car gently through the gears warms up the engine and oil temp much quicker than a simple idle. Your ECU could be running in "safe" mode as well disabling vtec because something is not right, a sensor may not be reading correctly, etc.... I would take it to the dealership and have them run a diagnostic on the engine and that will determine whether or not your vtec is working much more than a bunch of driver opinions. We all have different fun factors so your fun factor may exceed your car's fun factor, and/or there is a problem. So get it checked and post your findings....

junktionfet

All you've done is explain how you define the word "rush", and how you believe your definition is somehow superior to the author's. Nevermind... forget it.

While we're on the subject of pointless semantics... I'll have to disagree with your mention of the Integra Type R in the same breath as an NSX or Corvette. The only rush that car produces is the switch from no power to some power. Hell, I could do that in my old diesel car by playing with the accelerator That was a "rush" for sure.

hyun

^ have you ever driven a real type-r?

aaronng

So what? It's still only 200hp. LOL

synthetic

Actually most people are obsessed with the Type-R because of the name and the perestige it brought to the rich kids among the high-school ricer nation. Other than that the Type-R with its rediculous price-tag could be considered a failure against the competition.

And VTec was never meant to provide a rush(and it never did even in the type-R). It's meant to maintain a good fuel-economy in normal driving conditions while giving the driver the benefit of some extra boost at high-rpms. It does not enhance the engine's overall performance by any stretch of imagination. All it does is save you some money at the gas-station.

The power-boost you experience during the VTEC is not coming from outer-space. It's the power the engine always had but didn't make it available to you while you were on the lower-cam. Again, just to save you some $$$ at the gas-station and reduce emissions.

curls

I beg to differ. VTEC was created to allow two more suitable cam profiles (one low-rpm, one high-rpm), rather than one "jack of all trades" cam profile.

It's a known fact that certain cam profiles are better at low rpm and others are better at high rpm -- VTEC addressed this by making that a reality, and not sacrificing top-end for low-rpm torque, or vice versa.

Another result of this is increased economy, and, yes, a bit of a rush when the cam changeover happens. Surely it's nothing major but even a built B17 engine from a GS-R can kick you back in the seat fairly well when you hit the crossover.

aaronng

If you get a big kick in the seat, then your tuner didn't do a good job. The best tune is one with torque increasing all the way (or at least constant). If you have a dip before the crossover point, it's a poor tune.

Anyway vtec was made so that you can have your 100hp/litre without resorting to 2000rpm idle, less than 50% torque below 3000rpm and horrendous fuel consumption to avoid damaging the engine when trying to pull from low RPM.