Update: Phoned main dealer today and he said it may be that the ECU needs 'mapping' to the new EGR valve. Usually this happents without any intervention but they have had cases where the tech2 is required. He suggested that I run the car for a couple of hundred miles which may teach the ECU the right settings for the EGR. Here's hoping!This morning I went to the local vauxhall dealer and purchased a shiny new EGR valve. It did not look quite the same to me but the dealer said it was the right one. Took it home and it was OK except that when fitted the electrical connection was facing downwards instead of the original one facing up!!!. Don't know if this is by design or someone just put it together wrong! After fitting it the car sounded smoother just idling, and driving it I now have all the low down power back again - it felt great until..... it started to misfire. Doh, 2 steps forward and one step back! Need to start surfing again to see what that could be all about, unless one of you good chaps can give me some ideas? It misfires on moderate acceleration. Seems OK with gentle or hard acceleration but gives a misfire randomly in-between.[/b]
I'm so new to the forum that I haven't even picked up my car yet, I will do so on Tuesday, it's a 150 '06 Convertible diesel 9-3, with 54000 miles on the clock.
I have had a Rover 75 diesel for the last 5 years, it's now on almost 160,000 miles, and still goes like stink. The reason I'm posting is that a few years ago I fitted an EGR bypass unit, which obviously does away with the EGR valve altogether, and the vacuum pipe is plugged/sealed.
As this made a noticeable difference, I wonder if the same thing could be done/is available for the Saab diesel? Judging by the comments on this thread, maybe it's not, but worth asking, I thought.
Going from my recent experiences I'd be tempted to start by cleaning the MAP sensor. It's only 1 bolt and ten minutes to do. Soak it in some carb cleaner and give it a gentle scrub with a toothbrush.Hi All,
I have noticed, in the last 2 days, a slight hesitation (sometimes hiccup) on occasion, when I get back on the gas after engine braking/slowing down etc... Happens at low revs (up to 2500rpm)... No EML or any other indicators - could this be the start of EGR issues??
Going from my recent experiences I'd be tempted to start by cleaning the MAP sensor. It's only 1 bolt and ten minutes to do. Soak it in some carb cleaner and give it a gentle scrub with a toothbrush.[/b]
Have a look at the 3rd photo in this post (thanks go to hitby) and you'll see it just left of the yellow circle. The bolt you need to remove is just by the top right corner of the white rectangle. You can just get an allen key in. Undo the bolt, disconnect the plug and pull out the sensor (slightly tight because of the seal). Give it a gentle scrub with a toothbrush/carb cleaner and pop it back. The symptoms you have are very similar to mine (although I also replaced the EGR valve) and the car drives so much better now).Thanks for that, I had a long chat to my local Indy and am going to pop by to put it on their diagnostic (Tech2 I presume). I was just a bit concerned about hunting for problems as it really is not that bad (although I do think the engine sounds a bit noisier than usual).
However, where is the MAP sensor located? I will give that a bash before... I am not going to clean the EGR as results seem to be mixed as to whether it cures the problem (plus I will probably end up causing more damage!).