Pagoda SL Group

W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: Neil Thompson on August 21, 2016, 19:56:05

Title: Fuel Pump Blowing Fuses
Post by: Neil Thompson on August 21, 2016, 19:56:05

I have a problem with a short type electric fuel pump which keeps blowing no.4 fuse. The pump was new a few years ago on a restored car which has been stood with poor fuel in it. I have had the tank off, drained, rinsed etc and also cleaned all the fuel lines and replaced the filter. I have fully dismantled the pump and motor, cleaned and reassembled - it works but the motor part of the unit seems to me to be hot and blows the fuse within minutes. I thought the supply may be restricted and starvation causing the heat so I removed and pumped from test tank to test tank, it pumps very well but still gets very hot quickly. Am I missing something simple here or could it just be a bad pump?

any help gratefully received

thanks Neil 

Title: Re: Fuel Pump Blowing Fuses
Post by: ja17 on August 22, 2016, 04:01:53

The fuel circulation cools the pump.  Make sure the fuel return is not blocked  and you have good circulation of fuel back to the tank.