Car is a 93 300D 2.5Turbo

Hello all. Ive noticed something funny today. Sometimes my tach will not work (register 0 all the time). When this happens, the car is sluggish (turbo is not kicking in). When the tach is working, the car drives fine. How can this be? Also, the cruise control DOES work when the tach doesnt.

I checked the Overload protection relay and both fuses are fine. Should I go ahead and replace the relay?

any info greatly appreciated.

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93 300D 2.5 Turbo, Black/Palomino 273K
09 E350 Black/Black 41K

Might be the OVP...hopefully it is because the next step is the EDS computer. Make sure all the connections to the computer modules behind the battery are clean and tight.

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Dale

http://i52.photobucket.com/albums/g1...MG_2277sig.jpg

1990 300D 2.5 Turbo -155k
2000 E430 - 103k
2014 Jeep Grand Cherokee Ecodiesel 4x4 - 11k
2014 VW Passat TDI SE - 7k Bro's Diesel
2006 E320 CDI - 128k Pop's Benz

Pre-glow - A moment of silence in honor of Rudolph Diesel

The new OVP relay fixed the problem...

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93 300D 2.5 Turbo, Black/Palomino 273K
09 E350 Black/Black 41K