mritchard wrote:I have same problem with 2009 turbo diesel manual. Had check engine light come on about 3 months ago with fault code for EGR valve so replaced it. I had the inlet manifold cleaned about 6 months ago and the extra power and fuel economy was amazing but now the surging has returned again. The surging happens only between 2000 - 2600 revs irrespective of load or what gear you are in. It's a pain. Due for 140,000 service and am thinking I'll have the SCV changed to see if this helps. Will advise. I've tried all sorts of fuel additives with no success! Normally use BP or United fuel. Haven't used Woolworths/Caltex as most mechanics advise against it. If I can't get it fixed (as this has been an ongoing problem) will probably have to fix it with another vehicle but can't sell a car with an obvious surging problem as it happens all the time whether cold or hot towing or not!
So, ok, sucks to hear, many of us have "been there, done that" and feel your pain.
So, starting at the top, does it have a new fuel filter? Next, is the MAF sensor (on airbox tube) cleaned with MAF sensor spray and making a good connection? Next, pull off MAP plug (rear of engine, pass side top near the firewall) and fuel rail plug (rear pass side very low, expect grazed knuckles lol) and give them a good clean with contact cleaner or the MAF sensor cleaner spray. Re-fit and check all connectors are tight/clipped properly. Problem still persists, try a lil fuel lubricant additive (or 2 stroke oil) in next tank. Now, if no improvement at all, maybe start looking at scv etc. I had an ongoing prob that ended up being just a dicky connector on fuel rail, mud will do that
Let us know what works/doesn't.
sS