Ok, this one has me stumped. I noticed today the return of my power loss/surge. It is very intermittant, but when it occurs, here is what happens. If you are cruising at highway speed, it will feel like a light miss/skip/stumble.... almost like a filter is starting to clog a bit. If it happens while you are accelerating from a stop, at about 35 MPH it feels like you are trying to accelerate while applying the brake, and no amount of additional throttle will cause the power to increase for a couple of seconds, then it feels like you released the brake and the car will take off.

Now for the kicker, I also noticed starting today that whenever you apply anything more than half throttle and are accelerating hard, the glow plug light will start to flicker and will keep flickering until you go below half throttle. I was able to duplicate this easily several times by simply applying half or more throttle.

What on earth could cause the glow plug light to flicker like that (It did it while the car was doing the surge thing, and then it did it while the car was accelerating normally, but NEVER below half throttle!

Oh yes, I replaced the glow plug relay last year with one that has the three minute afterglow feature.

Got to drive the car tomorrow, so I would like to have a rough idea what might be going on.

Glenn

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2012 Mercedes ML350 Bluetec 102K (hers)
2005 Corvette 55K (fun car)
2002 VW Jetta TDI 238K (mine)
1998 Volvo S70 T5 Turbo 211K (kids)
1994 Ford F150 4WD 246K (firewood hauler)
1983 Mercedes 300D 384K (diesel commuter)