Has any one any ideas to help me out here ..... ?

I've got a uk spec 1998 Turbo, and when accelerating in 4th or 5th gear at about 4000 revs there seems to be a sudden power loss, its goes with a sort of jolt as your pulling away, it doesnt do it all the time, and there no pattern of when it will happen.

Any help appreiciated .......

Thanks ......

 

first i have to ask when was your spark plugs and leads changed ? i had a similar problem and thats all it was. As you speed up the boost blows out the week spark and bobs your uncle and fannys your aunty you have a jolt. Hope that helps.
cheers graham

 

Cheers for that i'll give that a shot and see how we go .......

 

mine UK99 did this nailing it between 3rd and 4th sometimes, it sort of goes in with a bang. I think its gone since changing the fuel pump for an uprated one.