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VTEC - could it not disengage?

 
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Old 10-23-2012, 01:00 AM
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Icon5 VTEC - could it not disengage?

Hey, everyone.

Trying to figure out my idle issue.

Is it possible that VTEC could be hitting under acceleration, and then not disengage (completely) causing idle issues during moments like downshifting?

Just curious..
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Old 10-23-2012, 03:47 AM
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Re: VTEC - could it not disengage?

I think youre looking for cure from wrong place, idling and vtec doesnt be related to each others
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Old 10-23-2012, 04:56 AM
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Re: VTEC - could it not disengage?

idle control valve/motor
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Old 10-23-2012, 10:26 AM
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Re: VTEC - could it not disengage?

If vtec is not engaging. Then clean your vtec solenoid. The idle could be a number of things.
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Old 10-23-2012, 10:40 AM
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Re: VTEC - could it not disengage?

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Originally Posted by TypeT View Post
I think youre looking for cure from wrong place, idling and vtec doesnt be related to each others
^^ this.
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Old 10-23-2012, 03:14 PM
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Re: VTEC - could it not disengage?

You would have to have some MAJOR tuning done to the ECU. The ECU would have to be reading that the requirements for VTEC are satisfied at all times. Then it would idle like it has a different cam in it.
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Old 10-23-2012, 04:43 PM
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Re: VTEC - could it not disengage?

VTEC can't just "stick" in engagement, so look elsewhere for your idle issues.
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Old 10-23-2012, 07:11 PM
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Re: VTEC - could it not disengage?

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Originally Posted by Phantom240 View Post
VTEC can't just "stick" in engagement, so look elsewhere for your idle issues.
my car would idle like crap an everytime id go to move "in first gear obviously" it would be really chunky and act like it wanted to die .. cleaned my idle air control or whatever the hell its called with some no residue contact cleaner and sprayed the hell out of it for like 2 minutes , let dry and your good to go
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Old 10-23-2012, 07:12 PM
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Re: VTEC - could it not disengage?

Yeah I've never heard of VTEC not disengaging. It seems like you can't find out this bad idle issue. Have you tried cleaning anything like the EGR, bad spark plugs can also cause a rougher idle.
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Old 10-23-2012, 07:46 PM
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Re: VTEC - could it not disengage?

I'm totally new to VTEC, so I'm just guessing.

What I've done, so far:
New K&N air filter
Cleaned IACV
Tune-up (plugs, wires, cap, rotor)
Bled coolant system

What I plan to do, soon:
Clean EGR valve
Clean EGR ports (could use some help with this)
Clean TB
Replace all vacuum lines

What else is there?

Tnx,
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Old 10-23-2012, 09:48 PM
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Re: VTEC - could it not disengage?

well the new civics w/ i-vtec are always vteccin away
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Old 10-23-2012, 10:09 PM
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Re: VTEC - could it not disengage?

You may have a clogged EGR though it usaully throw a code when it's bad. Cleaning it and new ports will help. You really don't need to change every vaccume seal just check and see if any of them are leaking air should be easily spotted.
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Old 10-24-2012, 03:30 AM
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Re: VTEC - could it not disengage?

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Originally Posted by 01PreludeBlue View Post
Yeah I've never heard of VTEC not disengaging.
if theres not enough oil in engine, vtec doesnt work
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Old 10-24-2012, 03:33 AM
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Re: VTEC - could it not disengage?

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Originally Posted by WolfShade View Post
Clean TB

What else is there?
clean fitv
clean injectors
adjust idle from idle adjusting screw

if you still continue having problems

adjust ignition
new tps (and calibrate it)
new map sensor
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Old 10-24-2012, 08:47 AM
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Re: VTEC - could it not disengage?

Quote:
Originally Posted by TypeT View Post
if theres not enough oil in engine, vtec doesnt work

DISengaging, DIS!!!!



Quote:
Originally Posted by 01PreludeBlue View Post
Yeah I've never heard of VTEC not disengaging. It seems like you can't find out this bad idle issue. Have you tried cleaning anything like the EGR, bad spark plugs can also cause a rougher idle.



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But you need that scoop on the hood. Is it true that they're big enough to fit your lunch box and all your camera gear in it?
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Old 10-24-2012, 10:53 AM
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Re: VTEC - could it not disengage?

if your car stays above the rpm set point for vtec, then year it won't disengage lol.
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Old 10-24-2012, 11:12 AM
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Re: VTEC - could it not disengage?

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Originally Posted by ogsmakdade View Post
if your car stays above the rpm set point for vtec, then year it won't disengage lol.
Provided you've got your foot in the throttle, you have sufficient coolant temp and oil pressure, and the car is moving. lol
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Old 10-24-2012, 07:29 PM
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Re: VTEC - could it not disengage?

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Originally Posted by TypeT View Post
clean fitv
clean injectors
adjust idle from idle adjusting screw

if you still continue having problems

adjust ignition
new tps (and calibrate it)
new map sensor
I thought '96 and later models didn't have FITV?

I used injector cleaner in two tankfuls of gas shortly after purchase.

What are TPS and map sensor?

Thank you,
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