Quote:
Originally Posted by oso
My '87 300td started to shift a bit too firm. I checked the line going to the modulator and it reads only around 8 at idle.Expected more like 15. Where to look next? Appreciate any comments.
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Check the vacuum level at the input to the VCV (one of the two lines that enter the top of the VCV).
This will confirm whether you've got a vacuum leak elsewhere in the system (highly likely).
If you haven't already done so, all the vacuum components on the right side of the vehicle and be disconnected and the four way that's at the output of the vacuum pump can be changed to a two way (F) connector.