I could do with some help to find this problem please
I use my van to tow our caravan as I find my vectra 1.8 not man enough.
What happens after a few miles is I struggle to get more than 40 mph but I found out on the last trip if I turn off the ignition it will be ok again for a while. It doesnt seem to follow any pattern I just came back from Yorkshire 125 miles with no problem but on the way there it did it 3 times . It also struggles to run at low revs yet will tick over ok
Any help would be greatly received