b18c7 not hitting vtec ..

[cotts13]

Fellas,
Quick question.
Yesterday driving home and went to hit vtec and basically seems like the engine is going into detonation and will not crossover. Will rev passed there but vtec wont engage.

I know it could be a number of things but wanted to ask before.
Figured it could be something to do with water as had plenty of rain but still the same today.
Checked plugs and all good and have 1/4 tank fuel

Any help appreciated :)

[curtis265]

you need to top up your vtec fluid

[curtis265]

i.e. check ur oil

[infurNOS]

Could be a million things dude, Did water get into the car? Look around the ECU to make sure it did not get wet.

Does the car misfire or does it have hard starts now? Sometimes condensation and moisture can cause the distributor cap and rotor to wear out, so check them to be safe.

Other than that, here is the "Why VTEC Doesnt engage" Thread

http://honda-tech.com/showthread.php?t=830163

Here is a systematic way of figuring out why VTEC won't work, if you have gone through the basics:

http://honda-tech.com/showthread.php?t=1812135

Good luck :)

[Emnesty]

have you checked the most basics thats visible to the eye?

Are there any CEL Codes?
Check that the VTEC Solenoid plug is connected?
Check oil pressure switch plug is connected?
Checked oil levels?
Are you hitting vtec at cold temps? - should be at normal operating temps.
Timing could be off?
Knock sensor plug could have fallen off?

check the basics and then go from there.

gl champ.

[connorling]

i would check the engine oil first as the vtec will not activate if the engine is runing low on oil.

next thing i would check is the vtec wires at the back of your ECU.
google the specific wire for the vtec.

[dc2r-0636]

Could have no oil pressure, how old is your oil?

If oil is newish change ur vtec solenoid gasket

[jdm18c]

Was the car warmed up?

[grifty]

check that the connector to your flux capacitor is connect properly, it has maybe come loose












by flux capacitor i mean vtec solenoid

[NeedVtec]

These guise are torquing about the oiling


so check your oiling

[Vvvtec]

Good info guys

[nate92]

If your car is cold vtec wont engage y0

[cotts13]

sorry about the delay. Cheers for the massive input guys.

Drove the car yesterday and started fine. After 30 mins driving hit vtec and came on with less power and also bit later than normal. Put new plugs in even though last set still looked pretty good.

So drives pretty good now but not feeling as snappy and feel like its taking at least a second longer in 2nd gear to hit vtec

[SU-WOOP]

oil strainer clogged on the vtc solenoid gasket due to sludge deposits
faulty knock sensor
vss switch innop
cheep oil filter faulty oil pressure relief valve so many things i could be here all day