Vtec on and off not working properly

[Eze]

Hi all My vtec has been coming on and off lately like itll kick in at 6k rpm then die at 6.5 and come back at 7.5 and random shit like that. Anyone have any suggestions? Ive already checked oil and pressure.

cheers

[hisoka]

get a vtec light wired up and check if the signal itself is turning off or not . this should give you a good basis to begin with.

what mods and what ecu are you running. and last mods done to your car would help

[Eze]

sweet ill do that asap cheers.
Car is quite stock but i just upgraded the exhaust and high flow cat, that cant have anything to do with it

[Aydin]

check oil, check speedo sensor, check vtec wire...if still same after those check have been cleared, then run a diagnostics...

[ewendc2r]

sounds like oil pressure?

[DC2-PWR]

Change oil aswell

[espionage85]

what was the outcome?
im having problems to

[hisoka]

lol if you got a dirty airfilter, that will stop it from working too, new discovery this one

[DC2-PWR]

lol if you got a dirty airfilter, that will stop it from working too, new discovery this one

lols i wonder how dirty the filter would be to stop vtec

[na-118]

Change oil aswell

you wouldn't wana jump straight into changing the oil that's 25-50 dollar right there, though do check condition of oil

[espionage85]

how do i check oil preasure? or do you guys just mean check oil levels?
just had a service a week ago has 20-50w in it
and what does a dent in the oilsump do with it lol
coz i might have a lil ding in mine

[zropts]

ditry vtec solenoid & check 100A fuse in fusebox (under bonnet next to battery).

[nickk]

could be the vehicle speed sensor!!! check the plug to see if the pins are farkd. exact same thing happened to me.. then vtec fell off. Changed the connector for it and then I could start scaring kids at bus stops again.

[Eze]

hey guys thanks for all the help i forgot to report back, after trying 2 different speed sensors and the problem wasn't fixed I found out that the actual plug that sits on the gearbox was farked as Nickk mentioned.
So if anyone has this problem make sure u check both the sensor and the plug!

[espionage85]

could be the vehicle speed sensor!!! check the plug to see if the pins are farkd. exact same thing happened to me.. then vtec fell off. Changed the connector for it and then I could start scaring kids at bus stops again.

more details and description please...

[nickk]

I will take photos on my lunch break and write a description :)

[VTec1987]

dent on the oil sump will affect the oil pressure hence vtec wont work.....

[itequilla]

i heard theres a vtec sensor you can check if leaking?

[meatball]

clean out the vtec solenoid?

[zco]

WTF 25-50 are you serious ... shieettt lol

[na-118]

20 50 is to cover up the tappet noise when selling it haha

[TODA AU]

? really ? Why not just adjust em?

[na-118]

LOL might be selling it and dont wana spend 150 getting them adjusted

[hisoka]

20 50 is to cover up the tappet noise when selling it haha

LOL oh shiet, secret out

[espionage85]

not selling it, mechanic put it in.
just changed it to oem 10-30, runns alot better, but still isnt kicking as strong as i would like it to