Vtec Flatspots?
Posted: Thu Nov 19, 2009 9:17 am
For some reason today, totally out of the blue, when accelerating in vtec in 3rd gear only there is a weird flat spot at 6500 rpm and again at 7500 rpm..
Car seems to hesitate and then go again...
Doesnt do this in any other gear.. I gave it a second test on circuit this morning on the back straight as we have a down day to see if it does it in any other gear just to be certain and it doesnt.
The engine is stock, have the factory airbox the only modification done is the backbox which has been on for a month at least and has caused no problems..
Little concerned, aswell as it being somewhat bloomin irritating..Its not the clutch, that is fine Jamie (previous owner has taken out on circuit to see and it does it in 4th gear too)
Is there anything i can check? What to look for? Your thoughts are appreciated..
Thanks
James

Doesnt do this in any other gear.. I gave it a second test on circuit this morning on the back straight as we have a down day to see if it does it in any other gear just to be certain and it doesnt.
The engine is stock, have the factory airbox the only modification done is the backbox which has been on for a month at least and has caused no problems..
Little concerned, aswell as it being somewhat bloomin irritating..Its not the clutch, that is fine Jamie (previous owner has taken out on circuit to see and it does it in 4th gear too)
Is there anything i can check? What to look for? Your thoughts are appreciated..

Thanks
James