John, I'm not an expert on the 2.5T engine controls, but I have a hard time buying the claim that an injection pump sensor is bad. I believe the only sensor on those pumps is a rack position sensor, and I think there's a procedure in the manual explaining how to test it. If it's bad, yes it requires pump disassembly to repair, or basically installing a rebuilt pump ($$$$) or a used pump (only $$$). I'd make VERY sure that is the problem before doing the swap, and even then I'd most likely just get a used pump rather than a $2k new/rebuilt. Rusty might be able to get you a rebuilt unit cheaper, if you do need one.
If you have the time, I would swap pumps between your 2 cars and see if the problem follows the pump or not. It could be done in one weekend as DIY. :-) -Dave M. > ------------------------------ > Date: Fri, 30 Sep 2005 16:28:44 -0400 > From: "John Peterson" <[EMAIL PROTECTED]> > Subject: [MBZ] Sensor in Injection Pump '90 300D > > I've been trying to diagnose a loss in boost in my '90 300D. I brought it > to the indie who found that (1) a vacuum tranducer is out and (2) he thinks > a sensor on the injection pump is giving no electronic signal to the ECU. > He says a 2k injection pump is necessary. > > Is there any more economical way of changing this sensor? Rebuilt IP? > Seems hard to believe it would be so buried inside that it can't be replaced > if necessary. > > Thanks Friends! > > John Peterson > Kingston RI > 1990 300D 2.5 127k > 1991 300D 2.5 72k
