Driving my car at around 40mph in 4th gear it feels lumpy when using very little throttle and also i am occasionally having to use 1st gear to get up some inclines, Any theories on what it may be, I have had as you may know a lot of oil in the water and have changed the oil cooler but would this be caused by the head gasket going or being gone!
I just dont seem to be having much luck with dubs at this moment in time!
Try the easy stuff air and fuel filters. Possibly check your timing if those don't help.
lumpy as in some what missfire? as in the road got wavy?
Feels like it is struggling kind of lumpy if thai helps, the cam belt was done about 6k ago so i suppose if it was'nt done right!
retarded timing I - would check it asap