a little history, car is 85 gs with 13b and dell set up. Car was set up with mallory 4070m pump when i got and holly f\p reg plumbed with return. drove it six months and the puel pump died. took it apart and brushes and armature worn out, so I replaced it with the same pump and upgraded the wiring during install.

So yesterday on the way home from work the pump stopped. thought maybe I kicked the wire out of the fuse block, It has happened before. checked it and it was good. Waited a few minutes and the car started pump was running again. drove a few miles and it stalled again. Got under the car and thumped the pump once and it came back on. This pump is only 5 months old, it cant be worn out already. when it is running it is still quiet but surges every once in a while like low voltage. I do not have a dvm at home to check it today.

so has anyone else had problems with these pumps? I purchased it from Racing beat so I thought it would be a quality unit. I have added a chassis ground as well as wiring harness ground, running 12 gauge wire from the fuse panel to the pump that has a seperate fuse of 5 amp rating. any ideas what would cause premature pump failure?

 

This may just be me but i have never had any luck with anything from mallory.

 

I use the mallory pump and have had three failurs in fifeteen years. All three were brushes. Mallory sells (or at least used to sell) the brushes for about $9.00.

 

well took the pump apart cleaned it out( not durty at all) touched up the brushes and reinstalled. runnung for now, new brush kit coming tomorrow and will install.

 

Bosch is the way to go...

 

I've run mine for quite a while too Joe and have had no issues yet.

But then again, I am not reducing pressure to 3.5 either.

 

going to get rid of the check valve in the return line today and was told by mallory NOT to put a filter before the pump. this could cause starvation problems. Moving the filter to the engine bay before the regulator, see how everything works out.