The problem i have is when i stand on the throttle or go up a steep hill my car sounds like a bag of spanners. Just pootling around its fine. I tried the 98 octane fuel as a test and it was a lot better but more expensive for me. I even took it to my local toyota garage for a tune up and it came back not much better as he said thats all he could do. But personnally i think he did bugger all. And no-one i know can do computer timing, not even the local auto tuners i`ve asked cant do it as it was them who said toyota only. Which i think i bollocks. I have a EP91 4EFE n/a and want a way of solving it very cheaply. I`ve changed the plugs and its got a K&N air filter which is still clean. Anybody know how to solve this little problem i have?