Chaps,
I thought I'd start a new thread as, I can better describe the symptoms and, I've changed all the consumable ignition parts (leads, plugs, dizzy cap and rotor arm), with little effect.
Basically, the car idles and starts perfectly. On light to medium throttle inputs, it also behaves impeccably. It's when you go from medium to high throttle inputs that it misbehaves. Basically, on initial medium to heavy press of the throttle, there's a momentary hesitation, then the car picks up and it's off. When you have your foot flat to the floor, as the revs build from 4.5k ish upward, there's a very faint, what I can only describe as, pulsing. Like a slight dip, then power, slight dip then power, all the way to the red line. The car still feels very quick though. I've also noticed, if you hold the throttle in certain places, with little load on the engine, the car will 'hunt' and hesitate.
As above, I've changed all the consumable ignition parts, although, I had to reinstall the OE coli lead as, the new coil lead have a hole in one of it's insulation boots.
The plug gap is factory preset although, I checked it and it seems more like 0.7mm than 0.8mm ! The plugs are NGK IX 8's. I've reinforced the earth to the TPS, cleaned the TPS with WD40, reinforced the earth on the MAF, reinforced the earth on the fuel pump that sees 12.27 volts and the car has a earth bonding kit fitted. Timing is set at factory 20 degrees BTDC. And it's fault code free.
It has a Blitz filter and Hayward & Scott 3" elbow and downpipe to 2.5" decat exhaust system. A Cusco oil separator that vents to atmosphere. Original breather system removed, including rocker cover to inlet piping. TMIC with partial heat shielding. My AVC-R is set to 1.00 kg/mm (the car behaves the same with the AVC-R set to 'off' although, I don't recall it 'pulsing' ?!). It holds boost without the AVC-R turned 'on' but, you can see it fluctuate by 0.01-0.02 when the 'pulsing' is felt, when the AVC-R is set to 'on'. It's only ever run on Optimax/V-Power. And I've recently seen 300 miles a tank, when using A roads with mixed driving and frequent over taking.
It started misbehaving after a week of 150 mile a day journeys !
I think that's it, please help !
Cheers
Paul
I thought I'd start a new thread as, I can better describe the symptoms and, I've changed all the consumable ignition parts (leads, plugs, dizzy cap and rotor arm), with little effect.
Basically, the car idles and starts perfectly. On light to medium throttle inputs, it also behaves impeccably. It's when you go from medium to high throttle inputs that it misbehaves. Basically, on initial medium to heavy press of the throttle, there's a momentary hesitation, then the car picks up and it's off. When you have your foot flat to the floor, as the revs build from 4.5k ish upward, there's a very faint, what I can only describe as, pulsing. Like a slight dip, then power, slight dip then power, all the way to the red line. The car still feels very quick though. I've also noticed, if you hold the throttle in certain places, with little load on the engine, the car will 'hunt' and hesitate.
As above, I've changed all the consumable ignition parts, although, I had to reinstall the OE coli lead as, the new coil lead have a hole in one of it's insulation boots.
The plug gap is factory preset although, I checked it and it seems more like 0.7mm than 0.8mm ! The plugs are NGK IX 8's. I've reinforced the earth to the TPS, cleaned the TPS with WD40, reinforced the earth on the MAF, reinforced the earth on the fuel pump that sees 12.27 volts and the car has a earth bonding kit fitted. Timing is set at factory 20 degrees BTDC. And it's fault code free.
It has a Blitz filter and Hayward & Scott 3" elbow and downpipe to 2.5" decat exhaust system. A Cusco oil separator that vents to atmosphere. Original breather system removed, including rocker cover to inlet piping. TMIC with partial heat shielding. My AVC-R is set to 1.00 kg/mm (the car behaves the same with the AVC-R set to 'off' although, I don't recall it 'pulsing' ?!). It holds boost without the AVC-R turned 'on' but, you can see it fluctuate by 0.01-0.02 when the 'pulsing' is felt, when the AVC-R is set to 'on'. It's only ever run on Optimax/V-Power. And I've recently seen 300 miles a tank, when using A roads with mixed driving and frequent over taking.
It started misbehaving after a week of 150 mile a day journeys !
I think that's it, please help !
Cheers
Paul