Hi guys, I've lost hope in finding the fault with this so I'm trying my luck here. I have a TD04 Glanza running all the usual mods. I was driving along and felt a hesitation / misfire just as the car reaches full boost. It did this continuously and it wouldn't pass around 5k rpm. Well it may have, but only with seriously trouble. After looking around for some obvious signs and checking all vacuums I (well, me and Aamir) changed the spark plugs (gapped at 1mm), HT leads, Distributor cap and Rotor arm This didn't help, so we moved on to replacing the Ignitor, Coil pack and Map sensor. The igniter seemed to have helped. With this fitted, the car would rev all the way but had a flat spot at 5-6k rpm. Next we changed the map sensor, TPS, injectors with new seals, fuel pressure regulator and the distributor itself. The cars now running worse than it originally was! It's hesitant and misfires even when idling. Any used parts that have been fitted (such as igniter) have been replaced twice just to be sure. I've disconnected all the vacuums connecting to the boost controller and BOV just to rule out any damaged pipes or connections. I've also fitted a new vacuum from the inlet manifold to the map sensor. I unplugged the lambda sensor but that had no effect. the ignition timing has been set correctly. The ECU has stored no fault codes. Compression shows 170 across all 4 cylinders. The next step is a water temp sensor and maybe a lambda sensor. I can't think of anything else! Any thoughts may be handy!