Wot!! Have I Done???
 

Well just be 4 she lost 90% power to the s5 13bt it was back firing at high
rev's about 10mins later going four 2 gear hard she let go.

>hard to start.
>sounds like lawnmower.
>next to no smoke.
>just driveaball
>next to no boost

all help well be great cheers

is it really loud? make sure you didnt blow of some intake plumbing..

Do a compression test.

yep, im having the same problem and my rx7 is non turbo..

^^ N/A .. that doesnt sound good.. check over every thing in the engine bay and make sure its in proper order.. maybe you got lucky.. i guess.. and both the spark plug wires fell off a rotor or something stupid.. or maybe you ran out of gas..

best thing, like Stanello said, is do a compression test..

run a compression test and look for vacuum leaks