Im not sure if I am posting this in the right section but I have a problem with my 1998 astra mk4 1.8cd.

When I accelerate the car seems to judder and almost kick. This seems most common in gears 1-3 and mainly when I accelerate a little hard but is sometimes present even if I am accelerating gently. The problem seems intermittent and has been fine for the last 3 months I have owned the car but it has gotten worse over the last 2 days.

My dads mechanic hasnt had a look at it but he seems to believe it is the engine coil as apparantly this is a common fault on astra's. Having read up on the net I see quite a few people have had similar problems and have solved them by replacing the EGR valve.

As with most people finances are tight and I cant afford to have it back and forth from the mechanics. Is there anyway of finding out exactly what is causing the problem?

Any help is appreciated.