Hi, Do you have an engine warning light? I have the same issue and there is a 6 inch hose that is known as a week point, mine has a split in it of about 1 inch and after about 1.5 miles it won't rev over 3k rpm. There is a thing called a "Key" shuffle that you can do on you PT cruiser to display error codes. Put your key in and turn you ignition on for about 1 second and then turn it off for about 1 second, on again for a second and off again for a second, on again for a second and it should display your error codes where you mileage is. I get P0243. Something about the waist gate servo but I have replaced that to no avail (£180 odd quid) After a lot of searching, swearing and scratching of head I found a link to here -> http://www.ptcompany.co.uk/catalogue/maintenance6.htm#dih(hope this is ok as this is my first post here). I'll be putting my new one on in the next couple of days and seeing if it fixed it... I'll let you know. Regards J