Sorry bout that no9 I’m new to this site it just so happens that I had the same or very similar I am a qualified mechanic but hadnt worked on a commodore since VH era but I also have a vs serious 2 wagon (For Work) that I have had for about seven years. And basically I have set it up as a tow vechile and it’s got a trailer on it more than not, (been great).just bare with me for a minute and I will get to what I needed to do only a couple of nights ago I was using a mechanic mate of mine to look after it for me as I work in a different industry now, until about 12 mths ago I wanted to get the heads done on it and with out a second thought he said yeah there probably........ by now it has done a lot of Kim’s and I only wanted to do the heads to give me more torque l knew they weren’t.......after he had done the heads my car has never been the same, I will tell you that the head work that I wanted done should have given me plenty of more towing capacity, I then started questioning his capabilities and removed the heads thinking the worse case but they were to the specifications I asked. Since then I have been stabbing in the dark. The last couple of months my car started using more fuel but and when starting to stall every now & again. When starting in the mornings it was doing exactly the same. At this stage I really knew nothing about ecotec engines. But I tell you now that Without tooting my own horn I know every ......... thing about the running of them. don’t get me wrong I knew what to do with the Dynamics for head work, but compared to the amount of sensors on these ........ EGINES the heads were easy, last week I drove about 75kls towing an empty trailer & went through $40 of fuel, the next day same thing. I was starting to Dreed driving it. At my wits end I left work on last Wednesday at lunchtime as it was pissing me off big time. I had discovered this site and was reading a lot about people that had the same problem quite a lot. And honestly I was fearing the worded, but do not go done the same road as me and believe that everything on here is factual. No offence to this site it did help me quite a bit & a lot of it was around 2013/2015. So really not a lot of people knew about every sensor, some knew a lot about a sensor. I needed to go through each one myself as I had had a gut full if you believe everything thing you read you wil rebuild your whole car, as l basically did I started working on the issue around 12:30pm & gave up around 4:30am the next morning had basically taken out every sensor and worked out what each ones purpose was spent about three hours at my second home (Car Wreckers) im going there again tomorrow, not for my wagon thou it’s run great now as I also have a statesman that I play with (jazzing up)as my fun car, trying to compare what the sensors are supposed to look like. I only gave up as I needed to go to work in two hours. Sorry for banging on, lm writing all this so that you do not do the same there are too many sensors to go on about at this time because realistically I haven’t had a lot of sleep since but I will say that your car is not ........ you will be able to fix it, I wil start by asking how many k’s has it done, is it using more fuel than normal & last but not least is the exhaust tip black as black can get, mine was spitting black soot all over the front of my hammer tone silver trailer. I ask these questions as If so you might have an injector o’ ring not sealing or I did notice that the wiring loom for the injectors on the passenger side were sitting pretty close to inlet manifold under the throttle body & gets pretty hot every time I tried something I’d move the wires by accident and at one stage it receding up to around 3500 with no insulation hey try looking for those sorts of things as a leaking o’ring that’s how far I went also I replaced injectors & everything to no evail, it bought back my basic instinct that it’s normally the most simple thing that gives you the most grief, one more thing before I fall asleep in my shed do you know much about cars if you do l will probably be able to walk you through it, I’m off to bed now as I want to get up early to go shopping for my statto cheers Andyman I’ll check in tomorrow I just read back through it & it’s .......... long post sorry bout that.