Hi guys

I'm a little lost at the minute. Car is an Ap1 with a lot of miles but has been well looked after.

The car randomly cut out on me a few weeks back and had to be towed home after refusing to start.

Pump wasn't priming so changed to a new pump and tested it, works fine.

Checked main relay assembly, looked suspect, changed it and still no fuel pumping priming or fuel to the rail.

Went through the honda diagnosis procedure and points to relay but tried 2 now and still the same result.

Ecu has been checked and seems fine.

Anyone got any ideas? Car is completely stock.

Many thanks

Alan

 

There is a block connector in the loom that goes to the rear inc pump lights ect.
O/S/F inner panel inside car

 

https://www.s2ki.com/s2000/topic/113..._fromsearch__1

 

Assuming the fuel pump bench tests OK the next suspect is always fuses followed by relays. Connectors come next and the typical wiring harness seems to have hundreds

Then there's the ECU to contend with...

Got the shop manual? Usually very detailed trouble shooting.

-- Chuck

 

Thanks for the replies.

We went through the honda workshop manual to trouble shoot but it pointed to the relay. Changed relay but still the same issue. Relay clicks but pump doesn't prime. I will pull the interior and check the actual 12v wire from the relay to pump and see if there is a break there.

When checking with a multimeter, there seems to be a very low voltage towards the pump.

The ground seems fine. We also went through the manual and trouble shooter the ecu and that seems fine.

Very odd as it was driving fine 1 minute then died the next.