At my wits end with this problem now, really needing some help.
My 2.2 signum z22yh engine is running very rough. A few weeks ago my emissions light popped on and off for a few days, then was on solid. Car was still running fine for a week then one day was starting to get rough. The car would start up fine, idle well and pull away well, it would drive fine if i very very slowly accelerated (and I mean old man on a sunday accelerating). But if you accelerated like you would normally drive or if you were joining a motorway the car would all of a sudden run very very rough, accelerating was almost not there, took me a few mins to get from 40mph to 70, which I thought was quite a long time lol. Felt like car went into safe mode or running on 3 cylinders but was getting no other warning lights apart from the usual emmisions light which was always on.
So for the past week Ive been forced to drive everywhere like a 90 year old man in fear I accelerate to hard and it starts running rough again lol.
After reading through forums I read Throttle body and EGR could be at fault. I set about cleaning them both, which to be honest were not to dirty, although I did notice the little flap inside the egr which opens and closes was very very stiff and hard open, is this normal?
Now since Ive cleaned the egr and TB out the car is constantly running very rough, as if on 3 cylinders. I dont think its driveable as constantly feels like it going to stall. Idle is crazy now ranging from 500rpm to 1500rpm.
Also does anyone know how the radiator tap works on this engine, mines would only turn about a quarter and no coolant would come out. Do you twist and pull the plug out? I ended up having to drain it another way to remove the egr.
Thanks in advance