Vtec sounding weird.

**BennyH** · 20-10-2011 04:39 PM

Hey guys, currently drive an EM1. Got a custom catback on the week end 2.25 diameter. Only mods on the car is an intake. Before I had the exhaust done, vtec sounded fine. After I had the exhaust done sounded sounded like it chokes or so as soon as vtec crosses over.

also, car is warmed up when I vtec it. Oils still good.

Anyone got any ideas on whats goin on ?

**Loagz** · 20-10-2011 07:13 PM

Did you reset your ecu? Your suppose to when you put mods on. So it can calibrate to your new airflow an whatnot.

**BennyH** · 20-10-2011 07:50 PM

Ohh, totally forgot about that. But the thing is, if I do it the engine will hunt cos of my intake. Ill give it a go anyways.

More help guys any other ideas ?

**Latino CRX** · 20-10-2011 07:55 PM

if the car starts to hunt just adjust the throtle body screw / pin

**BennyH** · 23-10-2011 12:52 AM

Bump, resetting ecu didnt work :S

**Bludger** · 23-10-2011 12:57 AM

Who installed the zorst?

did that person accidentally bump the A/C?

**BennyH** · 23-10-2011 01:02 AM

It was custom at an exhaust shop. I doubt he bumped it, wouldn't be near there. :S

**dc2r-0636** · 23-10-2011 01:23 AM

does it sound lyk a rexy in vtec?

**simmy** · 23-10-2011 01:26 AM

check your oil, vtec works on oil pressure
or drive til your petrol is almost empty and fill a full tank, might be contaminated petrol choking

could have a read on this http://preludehaven.forumotion.com/t...enoid-cleaning
http://www.ozhonda.com/forum/showthr...stion...-B16A&

best off taking it to honda to get it checked