My VTEC duznt work properly

Hi guys, more probs again...noticed something waznt right the otha day on my s2k. Im not the type who usually goes out and drives the car on the rev limiter all the time but the otha day i decided to give it a good hit on the freeway. Coming onto the freeway i noticed that when i took it past 6k rpm the power delivery felt broken....as if it was cutting out. Ive never had this prob before...power delivery has been really smooth in the vtec range but recently its felt like this....it was ok in 3rd and 4th gear tho i only had the problem in 1st and 2nd.......and ideas. could it be a fuel delivery problem maybe???

number of things.

Not sure about the f20c but for b series Vtec works on oil pressure as well. low oil pressure vtec does not engage.

Temperature-how long were you driving the car before you hammered it? normally wait for 3 bars. ( general rule)

Maybe one of your temp sensors are playing up? As above if one of your temp sensors are karked or just really dirty might not function right.

Doesnt sound like a fuel problem either, i was gona suggest that you put in the wrong fuel but you didnt mention it was pinging/detonating. Also do you experience cut off at any stage in the rev range? like limiter style cut off??

Check the engine oil level, if there isnt enough oil pressure, VTAK wont kick in.

[edit] fly beat me lol

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Originally Posted by EuroDude

Check the engine oil level, if there isnt enough oil pressure, VTAK wont kick in.

[edit] fly beat me lol

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:p :thumbsup:

maybe also try check the ecu .. see if it gives any fault code

i dunno wat it could be..oil preassure is good its duznt fully cut out its really like a shaky power delivery if u know wat i mean.....ill try and post up a vid but its really hard to tell unless your driving the car.

You are using Premium 95RON or 98RON fuel yeh?

The engine will complain if you use normal 91RON unleaded.

ye i got the right fuel.....its really weird.....some 1 at work suggested i check the condition of the spark plugs. They said it might be the cause of the problem

Yeh if there is bad spark, the engine will stutter at high revs.

Check the resistance of the spark plug leads and replace the spark plugs.

Also check for water/oil/degreaser in the spark plug holes.

will do....thanx for the advise guys gotta go do a few checks when i get home.....:thumbsup:

Have you checked your oil level yet?

ye checked it this morning b4 i left for work....oil was ok

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Originally Posted by BOOSTD

ye checked it this morning b4 i left for work....oil was ok

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Where was the level?

check your vtec soliniod ( im not sure if thats how you spell it ) is properly connected .

Also , could be a map sensor problem , and you will need to do the "Stop / start " cycle to reset your map sensor .

oh ok ill check it out.......my oil level was just under the full indicator - pre start...i was told that this was ok....is that where it should be?

yeh just under the Full mark is ok. That shouldnt affect the vtec pressure.

oh ok well i have a bit of a checklist anyways il try a few things tonight and see how it goes.

man in a few years time there's gonna be so many lemons going around it isn't funny, i'm so glad my car is mechanically sound and i'm so glad i got it before this new phase of ppl came in...

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Originally Posted by ROLLED

man in a few years time there's gonna be so many lemons going around it isn't funny, i'm so glad my car is mechanically sound and i'm so glad i got it before this new phase of ppl came in...

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ahha new phase of ppl?? which "phase" of people did u come in with?

if you have nothing helpful to say then :zip:

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Originally Posted by qstoria

ahha new phase of ppl?? which "phase" of people did u come in with?

if you have nothing helpful to say then :zip:

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he came from the "i'm better than you" phase i'm guessing

ye my car was perfect apart from clutch buzz. this is the only prob ive actually had with it. I do look after it well......and avoid 9k rpm launches lol. Im quite baffled by this tho....just gave the car a major service so im gonna try and fix this asap.

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Originally Posted by BOOSTD

ye my car was perfect apart from clutch buzz. this is the only prob ive actually had with it. I do look after it well......and avoid 9k rpm launches lol. Im quite baffled by this tho....just gave the car a major service so im gonna try and fix this asap.

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clutch buzz isnt really an issue , the clutch is fine . When you replace your clutch with a 01+ clutch , it wont be a problem anymore .

Trust me on my earlier tip with the "stop/ Start" cycle . A few other owners suffered from the same problem as you here , it wasnt oil / temp issues .

disconnect your battery , then reconnect it . Start the car and then switch off repeatedly 10 x times . I know it sounds crazy , but it works .
Also , you might want to give your map sensor a whack with a head of a screw driver .

deifinitely right FLY!!
if its not warm by 3 bars then it wont hit the vtec or power will drop staright after it reaches 6kRPM

if not check engine oil, the oil your using ... remember S2K use a very light oil, they use 10/30w or 5/40w.

if its neither it could be anything from solenoid, afm, 02 sensor or ecu... take it to a auto electrician

clutch buss is normal as well .. i had that in my previous clutch but after a fresh new clutch was sent from honda japan and was installed its gone ..

consider resetting the ECU by pulling out the fuse and pluggin it back in and let it set for 5-10 minutes without revving it or nothing

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Originally Posted by Vuey

check your vtec soliniod ( im not sure if thats how you spell it ) is properly connected .

Also , could be a map sensor problem , and you will need to do the "Stop / start " cycle to reset your map sensor .

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:thumbsup:

I believe it is your map sensor too. If you don't know what to do, just take it to the dealer and ask them to do it and clean out the connection.

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Originally Posted by qstoria

ahha new phase of ppl?? which "phase" of people did u come in with?

if you have nothing helpful to say then :zip:

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my post is about as helpful as asking people on the internet why vtec doesn't work...

BOOSTD: why wouldn't you just take it to a Honda specialist? hannys etc?

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Originally Posted by ROLLED

my post is about as helpful as asking people on the internet why vtec doesn't work...

BOOSTD: why wouldn't you just take it to a Honda specialist? hannys etc?

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ye i think i will...the only reason im asking you guys is to get an idea of what it might be....if it something small i can try and fix it myself rather than take time off and take it to a honda specialist. I really am greatful that every1 has been helping me out.

you should check the oil after starting the engine.

then if its just under the full mark ist ok

you will find it might be lower after a start up, but still shouldnt be the problem

have you been able to check the ecu for fault codes

have you ever noticed the engine check light come on while driving.

also just coz your engine oil is right, that does not mean the oil pressure is ok. it needs to be tested with a pressure guage.

90% of VTECH problems are oil pressure related.

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Originally Posted by ROLLED

man in a few years time there's gonna be so many lemons going around it isn't funny, i'm so glad my car is mechanically sound and i'm so glad i got it before this new phase of ppl came in...

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so true.

but gota admit some s2000 owners are arrogant pricks. s2000's arnt that quick stock anyway. pretty slow imo

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Originally Posted by JDMtoy

so true.

but gota admit some s2000 owners are arrogant pricks. s2000's arnt that quick stock anyway. pretty slow imo

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stole my plates!

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Originally Posted by RMN15N

stole my plates!

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hey i got that plate to on my car u stole my plate

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Originally Posted by todas**t

hey i got that plate to on my car u stole my plate

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ive had it for 1yr n a half nows.?

had the ecu checked and oil checked...im gonna change the sparks today...the vtec engages as nomal its just the power delivery that is inconsistent. it doesnt rev up smoothly when im going full throttle

Other people have had that problem on S2ki btw, search for a Map sensor Fix or Vtec stutter and you'll get your answer

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Originally Posted by ROLLED

Other people have had that problem on S2ki btw, search for a Map sensor Fix or Vtec stutter and you'll get your answer

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cool, thanks dude ill go check it out now :thumbsup:

thanks guys problem solved....was the map sensor.:thumbsup:

Good work

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Originally Posted by BOOSTD

thanks guys problem solved....was the map sensor.:thumbsup:

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see you should listen to the guys who actually have s2ks!!!

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Originally Posted by ROLLED

see you should listen to the guys who actually have s2ks!!!

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ye for sure :thumbsup:

Ive never read a more fustrating thread....

MAP WHACK the Farkn thing.

ninos u crazy kent, this thing fangs hard 8)

id recommend do a full service than start from there :D

how much kms u got on the car? has the intake fuel filter been changed ?

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Originally Posted by BOOSTD

thanks guys problem solved....was the map sensor.:thumbsup:

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Might have a similar problem!

How did you go about fixing the problem exactly?

its simple, have a read.

http://www.s2ki.com/forums/index.php?showtopic=209708

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Originally Posted by WhiteAP1

its simple, have a read.

http://www.s2ki.com/forums/index.php?showtopic=209708

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Cheers

:thumbsup: