Hi, had a blown backbox on my 99 is200 so had it replaced, I have also recently replaced ignition coils, radiator and water pump. Whilst the exhaust was blowing I noticed the revs were sitting at around 1200 whilst idle, when they normally sit at 700-800. Put this down to the blown exhaust, however the exhaust is fixed now and idle still at 1200 and engine sounds like it's working harder than normal. Any ideas?? After reading a few posts I suspect it may be throttle body but I'm new to re DIY repairs.
Cheers