Single Point Injection Rover Coopers

Back to Single Point Injection Rover Coopers...

SPI fuel problem (14 replies)

spanish singer
6 years ago
spanish singer 6 years ago

My 93 Cooper spi has a strange fuel problem. The car starts first time, every time. When you first start the car you can hear the electric fuel pump working

Alpenflitzer
6 years ago
Alpenflitzer 6 years ago

1) If the cranksensor is defect and does now and then give no signal to the ECU, the ECU thinks, that the engine is off and stops the fuel pump....or the ECU is not anylonger int the position to control the fuel pump relais.
2) I have replaced all these vacuum hoses with Samco Silicon hoses. Since then no longer any problem with these damned plastic and rubber stuff.
3) Check if you have a vacuum in the gas tank. The Spi needs a tank cap with no ventilation. The ventilation is done by the charcoal filter.
4) Take a 12 Volt lamp with a long cable and connect it to the fuel pump contacts. The lamp hast to be watched by you or a second person. Start the car. If the lamp goes off – fuel pump does not get energy. If the engine stops and the light is still on.....you need a new fuel pump.
5) Connect the fuel pump to the ignition plus ( cable with an inline fuse) . Then the pump is not anylonger controlled by the ECU. If the engine does not stop = the pump is oK.
6) That needs time and is in many cases a helpful job:
Let the engine run and start to move all relevant cables incl. those at the fuel tank. So I found now and then a corrosion/breakage.

I hope my English is good enough to understand what I propose. I was some time ago driving happily through the alps. Suddenly the engine stalled. Later on after several checks I had the car taken back on a truck. A very simple reason for that was, one of these damned glass fuses – which I all checked after the stop – was corroded and during the drive it seemed to slightly have moved.
If nothing works you should have a testbook check.
Regards and good luck Bill

Blade fuses Picture from another Mini
[URL='http://forum.minicooper.org/filedata/fetch?id=167055&d=1402479615'%5D%5BATTACH=CONFIG%5Dn167055%5B/ATTACH%5D%5B/URL%5D

Alpenflitzer
6 years ago
Alpenflitzer 6 years ago

1) If the cranksensor is defect and does now and then give no signal to the ECU, the ECU thinks, that the engine is off and stops the fuel pump....or the ECU is not anylonger int the position to control the fuel pump relais.
2) I have replaced all these vacuum hoses with Samco Silicon hoses. Since then no longer any problem with these damned plastic and rubber stuff.
3) Check if you have a vacuum in the gas tank. The Spi needs a tank cap with no ventilation. The ventilation is done by the charcoal filter.
4) Take a 12 Volt lamp with a long cable and connect it to the fuel pump contacts. The lamp hast to be watched by you or a second person. Start the car. If the lamp goes off – fuel pump does not get energy. If the engine stops and the light is still on.....you need a new fuel pump.
5) Connect the fuel pump to the ignition plus ( cable with an inline fuse) . Then the pump is not anylonger controlled by the ECU. If the engine does not stop = the pump is oK.
6) Testbookcheck
7) That needs time and is in many cases a helpful job:
Let the engine run and start to move all relevant cables incl. those at the fuel tank. So I found now and then a corrosion/breakage.

I hope my English is good enough to understand what I propose. I was some time ago driving happily through the alps. Suddenly the engine stalled. Later on after several checks I had the car taken back on a truck. A very simple reason for that was, one of these damned glass fuses – which I all checked after the stop – was corroded and during the drive it seemed to slightly moved

Good luck Bill
Photo of a blade fuse box in another Mini

[ATTACH=CONFIG]n167057[/ATTACH]

spanish singer
6 years ago
spanish singer 6 years ago

Tried to test the crankshaft sensor. The car doesnt start if I disconnect it so I guess its working as it should. When I re-connect it the car starts/stalls again as before.
I have ordered a length of silicon vacuum hose. I am going to replace all the old plastic hoses, as recomended, and see if that helps.
Paul.

Alpenflitzer
6 years ago
Alpenflitzer 6 years ago

Hi Paul, if the crank sensor is taken out, the car does not start of course. This says nothing about the sensor beeing faulty or not.
I have used the SAMCO 3 mm silicon hoses.
Have a nice day Bill

Back to Single Point Injection Rover Coopers...Back to Forum