diesel cut out

[Anonymous]

Help! my new weaver rsd4/5 6 truck diesel cuts out when
when it goes through my car graves switches at slow or
normal speeds. The only way the engine can go through
is at high speed, all my other engines have no problem.
The pickup rollers seem to be too far apart i'm sure this
is the the problem. Any ideas out there for a fix? I run "o"
gauge.

Thanx Mr Bob