99 2.5 Car running like stink - tom.mcg
This is the first time that I've used the website so a bit unsure of the forum function, but here goes.

I have a Vauxhall vectra (B) on a T plate 2.5 V6 SRi and it's been a great car for 10 years with only a few minor hiccups, However, I had the cambelt and waterpump replaced before Xmas and when I picked it up it ran really well. After leaving it over the Xmas period, it runs like stink and its missing on cylinders 1 and 4, all leads and plugs have been changed and the coil pack has also been replaced to no avail, I've now been told by the garage that I use, that its possibly the ECU. Haven't got a clue, any ideas???? I'd be grateful for your advice
99 2.5 Car running like stink - adverse camber
were the tensioners etc replaced at teh same time? Get the timing checked if you have doubts. Does the belt look to be running true?

Are you getting a spark at the iffy cylinders?