Corsa-B.uk - Vauxhall, Opel and Holden Corsa B Owners Club

Hey
I have a 1.4 16v sport with a x14xe engine ,
When I get to about 3-4 thousand revs the car starts to jiggle n the engine seems to loses power but yet still gains speed at a struggle , also the elm comes on yet as soon as I stop accelerating the elm goes out again
What could it be?

have you tried the paperclip test?
if you have an nothing comes up then you need to try get the light to stay for 30 seconds or more (easier said than done i know) but worth a try