Car seems sluggish and loud under acceleration

redcivic47 · Jun 23, 2014

The car still accelerates fine at peak rpm, and sounds 'raspy' loud however if you open throttle in low rpm in any gear i can hear a horrible boy racer type sound coming from underneath me and car feels sluggish until vtec engages.

What could this be? From the sounds I think exhaust however the garage states everything is fine and can see no leaks. Is there a way to test this using equipment?

** last week - The lambda sensor after cat was throwing up a light on the dash, but after replacing it the eml has turned off.

Could a new exhaust system eliminate this sluggish problem considering car is on it's original exhaust since 2002 although there is minimal rust. Does it affect performance?

What causes sluggishness? Apart from exhaust leaks. Fuel regulator? Fuel filter? Or something in airbox/air filter?

Just added iridium spark plugs, helix ultra 5w40, hamp short filter.

Hit me up with what you guys think.

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ktwentydc5 · Jun 25, 2014

I have had a similar issue with my dc5 type R and it happened to be a clogged catalytic converter, I had it replaced with a test pipe and the itr came to life.

iby_ep3 · Jul 11, 2014

I had same issue , used v power it's made a difference hope this helps , v power always now . Ibby

redcivic47 · Jul 11, 2014

I think it could well be the cat. Not bad suggestion.

I already use v-power fuel, I notice a difference in performance although it isn't the problem at hand

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redcivic47 · Jul 11, 2014

Also if I fit a test pipe, will my eml come on? What are the downsides to a test pipe? It's just a decat right?

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iby_ep3 · Jul 11, 2014

Sorry buddy I wouldn't know, have you had your valves adjusted ? That might be it.

redcivic47 · Jul 12, 2014

I haven't had them adjusted, maybe I should get them done.

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iby_ep3 · Jul 12, 2014

Ye, get them done, will cost you about £90 to £100 from dealers or cheaper else where , take it to someone you trust as they need to be done correct and when engine is stone cold . Hope this has helped.