Hello,

My Dad is experiencing some problems on his truck. He has a Dodge Diesel 12 Valve year is 92. D250

Symptom
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When the cruise control is turned on the truck seems to surge a bit. Like it goes faster then slows down, goes faster slows down. The cruise does not seem to stay at a steady gentle cruise speed. I searched everything in this forum and cant seem to find any one else experiencing this problem.

We did find one problem with the electrical part of the system, where the recommended fuse is a gray 2 AMP fuse, but the previous owner had a 5 AMP in it. I don't know if this would create any problems though.

Thanks for any help we can get.

Chad

 

Could be Vehicle Speed Sensor related. I know in my 93 2WD the nut on the rear yoke from the tranny was loose. This let the internal plastic drive gear slip inside the tranny and cause the speedo/cruise to go wacky. Other than that there is also the possibility of a leak in the vacuum system. The 1st gens are notorious for rotting of the line from the vac pump to the brake booster.

Hope it helps... Try the 1st genner section as well..