Hi.
I need to pick some brains regarding an odd intermittent problem.
I have a 1993 Dodge Grand Caravan SE with a 3.3 L engine. Everything works excellently except for the speedometer and tachometer "freezing" at random intervals. On a perfectly smooth road [no bumps appear to be a trigger] the speedo and tach will both stop right in their tracks and stay stuck at whatever speed/rpm I was traveling at the moment, even if I speed up or come to a complete stop. The odometer will also stop dead too. The other gauges appear to keep working fine. If I stop then shut the key off, the speedo and tach will then drop to 0. Upon an immediate restart, they usually will remain at 0 no matter what I do. Then, while driving for a few minutes, they will suddenly start working just fine. At that point the power door locks will realize that I am moving and will lock the doors, as they are supposed to. Sometimes, the speedo/tach will "freeze" for a few minutes then suddenly start working as I am driving, without me stopping or shutting off the key.
This does not happen often but often enough to be a concern, about once or twice a week. Today, however, it happened twice within a 15 minute span. Hitting any bumps in the road makes no difference one way or another.
I would really like to fix this problem, as the van is in almost mint condition otherwise and I would live to keep it for a while.
Any help would be greatly appreciated.