Fuel Pump Issues

[Chris49]

This is an on going problem.

Basically the fuel pump will only fire when it feels like it. Its been to 2 different garages and has come back the same every time. Its not the fuse, its not the relay and its not the pump itself.

I fear it may be a wiring issue, any ideas or guidance?

[Scuffers]

check the engine harness connectors, along with the inertia switch wiring

[Gad-Westy]

Sounds to me like wiring. With the car running and statinery, start waggling the wiring around the ECU. If the engine hesitates or stops, you've confirmed it. After that, its a case of narrowing down by picking out individual wires. My car had (and to an extent still does) a problem around the MFRU connector where the metal parts of the connectors had splayd out a little and were making poor contact.

[Chris49]

Gad-Westy said:

Sounds to me like wiring. With the car running and statinery, start waggling the wiring around the ECU. If the engine hesitates or stops, you've confirmed it. After that, its a case of narrowing down by picking out individual wires. My car had (and to an extent still does) a problem around the MFRU connector where the metal parts of the connectors had splayd out a little and were making poor contact.

Now thats the sort of thing I need. I agree it sounds like a wiring issue.

Thanks for that, I can get a wiring matrix so I'll try and track that down as my first stop.

[Jez49]

The S1 pump electrical connector can get very hot and fuse internally if your pump is old and giving a bit of resistance due to a partially blocked pickup gauze in the tank.

My pump started to play up after I'd been tracking the car a bit which obviously shook the st in the tank around, it started by cutting out intermittantly and then got a bit noisy, it never totally gave up tho.

If your on SELOC then drop Gaz a line as he *did* have a supply of uprated new pumps and could also supply the offending connector. If you decide to change the pump allow a day if its your first time as it can be a bd job to drop the tank and get it back in, the filler hoses and plastic filler neck are a pig. Youll also want to flush your petrol tank out, it'll be full of rust and st.

Jez