Just changed the rocker cover gasket on my 1.4 16v 1998 mk4 Astra and started the engine up to find the engine was a bit juddery and the engine management light comes on after about 5 seconds of going off from the intial on.
Intially thought we'd forgot to hook up a hose or put the wrong hose on but I've checked all the hoses and they are different sizes so can't get that wrong.
The engine doesn't seem to be misfiring or anything but I took it for a small spin down the road and it hated even getting to 20. When I rev it high the judder disappears but it doesn't have any power still.
Any help or suggestions would be fantastic Or any other info/tests I'll rush out and break my car some more
Thanks in advance