Can this forum give me some wisdom as i'm getting a bit frustrated now! I have a saab9000 se 2.3hpt and the engine check light is coming on and giving me a misfire,well thats what it feels like. When it comes on it dosnt like to idle&just generally feels fluffy. Any common things? I know the di packs are a common thing to go but the mangagement light will go out and it gets better/clears and goes out if you give it a bit of welly.thought if it was the di pack it would be constant. It only seems to happen if it gets hotter or run for a long time. this is what makes me think elswhere.any way to check things without the dredded diag tool? Ive tried to use my works unipart/bosch kts500 diagnostic tester but as bloody usual the sodding thing wont communicate. I tell you,that machine only likes vauxhalls!