bogy vtec help

[acclude17]

hey ive got a problem when vtec engages.when it engages it feels get really boggy until i back off the throttle then easy it back on its ok ne hepl would be good

[misteR_bilzz]

make sure theres no water where ur spark plugs go, that can cause ur car to run like its choking.

[acclude17]

thers no moisture where the plugs go.could it be the dizzy cap at all???

[fatboyz39]

oil pressure?

[acclude17]

oil pressure good

[fatboyz39]

Have you tried other ECU ?

[acclude17]

dont hav a diff ecu but the ecu works fine in diff car,so the ecu should be ok im guessin its sumfin wrong wit dizzy??not throwing ne codes

[ECU-MAN]

oil pressure good

how do you know

have you monitored oil pressure when its in vtec, does it fluctuate ??

[TODA AU]

hey ive got a problem when vtec engages.when it engages it feels get really boggy until i back off the throttle then easy it back on its ok ne hepl would be good

Take it to your local dyno shop & have it run up.
This plus a couple of snap shots should help determine what the problem is.
It could be any number of things, but if you see what it's actually doing it's usually a lot easier to figure out what the problem is.

[acclude17]

ive got an oil pressure gauge on a sandwich plat,i just move the presure gauge onto the head and its giving a very low ready .5bar on my gauge and does not go up when i rev it.

[Benson]

thats your problem there. No oil pressure to the head gives you poor vtec engagement (weak). Vtec needs good oil pressure to work.

Maybe you have a blockage somewhere.

[TODA AU]

ive got an oil pressure gauge on a sandwich plat,i just move the presure gauge onto the head and its giving a very low ready .5bar on my gauge and does not go up when i rev it.
Depending where you've taken the oil pickup off the head, this can be normal.
If you've selected post Vtec pressure, it'll do just that until the solenoid trips.
So you can rev it on the spot to say 4~5K rpm & very little will happen.
Take it for a drive & see what happens when Vtec is activated. Pressure should come up.
If it stays low, remove the Vtec solinoid & clear the screen filter.
(Assuming Vtec trigger wire is connected & servicable & oil level is correct)

[acclude17]

i put the pressure gauge on the front of the head where there is a 10mm bolt would that be the same??

[fatboyz39]

ive got an oil pressure gauge on a sandwich plat,i just move the presure gauge onto the head and its giving a very low ready .5bar on my gauge and does not go up when i rev it.

There your problem. Oil pressure.

OIl pressure should go up with you rev up. Hit up the honda manual and look up the specs @ 3.5k rpm or so.

[TODA AU]

i put the pressure gauge on the front of the head where there is a 10mm bolt would that be the same??

The 10mm bolt in the front of the head is post Vtec solinoid oil pressure.
As I said before, you'll need to come onto Vtec before you will be able to read any real pressure as this is the oil gallery after the Vtec solinoid.
This gallery is for Vtec activation pressure only, lubrication is via another gallery.

Check the pressure when Vtec triggers.
If there is a problem, check the Vtec filter screen in the solinoid.
If vtec oil pressure is similar/same to that on the sandwitch block, the problem is something else.

[krogoth]

wot pressure should a healthy engine read during vtec?

[e240]

wot pressure should a healthy engine read during vtec?

80~90psi

[acclude17]

oil pressure is all good changed vtec soilonid problem fixed.ive got another problem now motor is missfiring at low rev and on idle.wen thevs go past 1500rpm its fine the wen its goes down it missfire ive changed the dizzy plugs leads are only 3months old,no codes so i dont know wot the problem is.

[ef yu]

i had the same problem
my timming was off 1 teeth on the intake came
and check ur ect sensor
check ur timming marks and dizzy

[acclude17]

thanks for your help ef yu
jus did all that car is running sweet as now
zoom zoom
i think u deserve a PQ point


i had the same problem
my timming was off 1 teeth on the intake came
and check ur ect sensor
check ur timming marks and dizzy