Cracked exhuast manifold

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Oct 23, 2008 | 05:41 AM

VTECBROOKS

Thread Starter

Junior Member

Joined: Oct 2008

Posts: 8

From: York

Cracked exhuast manifold

I just found out that my exhuast manifod is cracked and my cat is cloged do you think that could be effecting my vtec kick in and if i fix that will it give me more horse power

Oct 23, 2008 | 05:50 AM

mk378

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Joined: Jun 2007

Posts: 10,023

Whenever the check engine light is on, the VTEC will not kick in.

A clogged cat will of course seriously reduce your performance.

Oct 23, 2008 | 07:14 AM

VTECBROOKS

Thread Starter

Junior Member

Joined: Oct 2008

Posts: 8

From: York

O well i do have a check engine light on because the mass air flow sensor got pulled out

Oct 23, 2008 | 08:58 AM

RonJ

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Joined: Sep 2007

Posts: 9,453

From: Houston, Texas

The cracked manifold most likely caused your engine to run rich, which in turn probably killed the cat. No VTEC should be the least of your concerns at this point. What specific CEL code is thrown? What year Civic?

Last edited by RonJ; Oct 23, 2008 at 09:18 AM.

Oct 23, 2008 | 09:06 AM

mk378

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Joined: Jun 2007

Posts: 10,023

You need the MAF sensor working to run properly too.

Oct 23, 2008 | 09:08 AM

FlipHKD720

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Joined: Mar 2006

Posts: 8,442

From: Marquette, MI

If the cat is clogged it will probably give you an inefficient cat CEL. Replace the cat and exhaust manifold, fix the MAF sensor, reset the ECU and see what happens.