VTEC not engaging?

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Nov 28, 2010 | 05:54 PM

#11

realblag

Joined: Jun 2010

Posts: 1,378

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From: out in the sticks, Tennessee

You need to be WOT and warmed up.

Nov 28, 2010 | 09:59 PM

#12

ssthrd

Joined: Jul 2008

Posts: 195

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Quote:

Originally Posted by abechien,Nov 28 2010, 04:02 PM

A while ago, I tried going into vtec (accelerating in first until ~8000 rpm), but I didn't really feel VTEC at all. It wasn't bogging or anything, but I couldn't feel a noticeable surge in power or sound for that matter. It felt like a linear increase in power, but no surge that I hear people talking about.

I checked the forums, and people said that it is mostly due to oil starvation, but I had only recently done an oil change with Mobil 1 synthetic. Can anyone please pitch in on what the problem could be? My car is a bone stock AP1. Thanks.

Any issues before the oil change? What weight oil did you use? i have no idea if it is true, but i've heard that VTEC won't work if the oil is too thick (as in a cold engine....................)

Just an idea.

Nov 29, 2010 | 07:09 PM

#13

Billman250

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Joined: Jul 2002

Posts: 22,384

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From: Long Island, New York

Clogged screen can cause it, but that's not it.

Number one cause for VTEC that is not working is a dirty air filter.

Second is a bad MAP sensor.

Nov 29, 2010 | 07:50 PM

#14

s2000maniac

Joined: Dec 2009

Posts: 4,032

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my filter is brand new... havent had any problems/symptoms of a bad map sensor. i will try to take out the vtec solenoid and see if i can clean it up...

Nov 29, 2010 | 07:53 PM

#15

TheSteel

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Joined: Nov 2010

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Was the engine warm, or did you just start it up?

Nov 29, 2010 | 08:06 PM

#16

abechien

Thread Starter

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Joined: Sep 2010

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Should have mentioned...my MAP sensor is fine, my air filter is clean,... and my engine was warm

Nov 30, 2010 | 02:11 PM

#17

whippets2k

Registered User

Joined: Oct 2008

Posts: 103

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So after you start rolling in first gear (2.5K-3K RPM) and push the throttle completely in, there is no abrupt acceleration at 6K?

If you are casually accelerating (partial throttle) and go past 6K there is just the linear acceleration that you are talking about.