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Testing with only in-tank pump running (Bosch) 900 1992

posted by  Amarin on  Sun Oct 26 04:32 CST 2014
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last visit: Thu Oct 23 22:42 CST 2014
[RELATED]

Hello,

The threads are long...I don't know where I should chip in..

I just tried to start my car (Bosch LH2.4 with dual fuel pumps) by disabling the main fuel pump (pulling out the relay) and jumped a wire from the relay's power terminal to the in-tank fuel pump.

Basically just to simulate how the car would behave with only in-tank fuel pump powered. Well the engine did try to catch on (tried to run) but never got to fully running condition.

The in-tank pump pressure has to overcome my main pump's resistance on its the way to engine. I think there should be some glimmer of start if you did mistakenly replaced the Regina main in-tank pump with Bosch in-tank pump.

The Volvo Pocketbook stated that the Regina in-tank pump should pull up to 8.8 ampere of power whereas the Bosch in-tank pump only draws 3-4 amperes.

I hope this would be helpful although this test is far from valid.

Regards,
Amarin.






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