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Ladies and Gents I have a problem. My beloved 98 626 has a lovely habit of, when in drive or reverse, revving from it's norm of 750-900ish RPM to 1500 and as high as 2000 for a short while before dropping back down to regular levels. Now I know the engine's idle will kick up for a short while then go back down, but it never revved that high before. It only does this in drive or reverse, as shifting to neutral or park relieves the symptoms and it idles normally. I have no CEL, and the only maintenance I have pending is to replace the rear VCG, as I'm a little scared of tearing my engine half apart and lack of tools or whatnot. What's going on folks?
I have a 98 626 with an ongoing problem that is driving me (no pun intended) nuts. It a 2 liter, 5 speed that has 200,000 miles (not 'k') on it that has been the best car ever that I've had. The only thing that I've ever had to replace is a 1/2 shaft due to a torn boot. I can't get rid of a misfire that I've had for a couple of years. I've replaced the plugs, the plug wires, the fuel filter, the coil pack. I've tried various fuel conditioners and higher octane gas all of which has very short term improvement. I 've he engine sputters at low rpm's when I step on the gas. If I let off the gas and then rev it again it is usually fine. It runs fine at higher rpm's unless I push on the gas too hard. I've read a lot lately that it may be the mass air flow sensor that needs to be cleaned but I'm not sure. Does anyone have ideas? Thanks in advance, Adrian