Flat spot before accelerating

[D00g13]

Hi all,
My chimaera has developed a flat spot before accelerating. Has anybody else experienced this and how do i correct it

Cheers

Paul

[SILICONEKID340HP]

Is your vac pipe connected from the plenun to the dizzy ..if so disconnect then suck the pipe to see if the can advance unit is working .

[Tri2Tri]

Good shout. Is the one way valve thats fitted to the vac advance pipe between plenum and dizzy really required as that looks like a potential failure point.

[SILICONEKID340HP]

Some people prefer to set the timming at 3000rpm with more advance then loose the vac but there are a few problems.

Crap MPG ,you loose that insatant power when you put your foot down but gain further up the rev range.

The cars does not drive as well at slow speeds..

[blitzracing]

Cant see why you would ever want to do that on a road car- disconnecting the vac' its only ever done on race cars that are flat out or fully shut throttle so part throttle ignition timing does not matter. You dont gain any BHP by disconnecting it- just loose MPG.