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Hard to start...need help


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HARD TO START FOR FEW SECOND !!

FAULT CODE - P1023, Fuel high pressure too low during starting.

- P1026, Fuel high pressure implausible

need to check which part, izit fuel pump problem? or......

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  • Admin

The fuel pressure regulator does not have a connection for the intake pipe pressure and is integrated into the fuel tank installation unit. Its nominal pressure is set at 55 psi ± 1.5 (3.8 ± 0.1 bar) for a flow rate of 21 gph (80 l/h). When running at idle speed, pressure is increased by approx. 1.5 psi (0.1 bar) due to the low fuel requirement of the engine. A holding pressure of > 29 psi (2 bar) should still apply one hour after switching off the engine.

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The fuel pressure regulator does not have a connection for the intake pipe pressure and is integrated into the fuel tank installation unit. Its nominal pressure is set at 55 psi ± 1.5 (3.8 ± 0.1 bar) for a flow rate of 21 gph (80 l/h). When running at idle speed, pressure is increased by approx. 1.5 psi (0.1 bar) due to the low fuel requirement of the engine. A holding pressure of > 29 psi (2 bar) should still apply one hour after switching off the engine.

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i had change the fuel pump and regulator but problem still existed. how bout high pressure pump?

Edited by soan
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Seems strange that it would say the pressure is both low and implausible (does not understand the input signal). First step would be a fuel pressure test to find out where the pressure really is; if it meets specs, clear the codes and see if they come back. If the pressure really is low, further investigation will be required, possible pump replacement.

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