EBL P4 flash and EST trouble code
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EBL P4 flash and EST trouble code
Recently I have gone through a period of EST code fault with temporary engine CO,s. After replacing two EST modules, the ECM and sending the P4
back for some R&R. the problem poped up yesterday again.
Going back through the differences between the EBL and the earlier 127730 with a ostrich the only thing was that I have a fuel pressure transducer set up in one of the EBL's ADC channels.
So during the EST code yesterday I turned off the motor I disconnected the wire running to the ADC channel. The code went away and never reappeared.
Today I am going to check on the integrity of the fuel transducer wire.
The fuel pressure sensor has been working for 3+ years.
Has any one seen these fail like this?
Maybe it is some how shorting the 5 volts from the ECM through the ADC channel? the code went away with the transducer still hooked up to 5 volts and ground and only occasionally through a code when hooked up two the EBL's ADC channel
Thanks
Dave
back for some R&R. the problem poped up yesterday again.
Going back through the differences between the EBL and the earlier 127730 with a ostrich the only thing was that I have a fuel pressure transducer set up in one of the EBL's ADC channels.
So during the EST code yesterday I turned off the motor I disconnected the wire running to the ADC channel. The code went away and never reappeared.
Today I am going to check on the integrity of the fuel transducer wire.
The fuel pressure sensor has been working for 3+ years.
Has any one seen these fail like this?
Maybe it is some how shorting the 5 volts from the ECM through the ADC channel? the code went away with the transducer still hooked up to 5 volts and ground and only occasionally through a code when hooked up two the EBL's ADC channel
Thanks
Dave
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From: Chasing Electrons
Car: check
Engine: check
Transmission: check
Re: EBL P4 flash and EST trouble code
Check the battery grounds and cables. Check the ECM grounds on the engine block. These need to be clean, tight, and no corrosion in or about the cables.
Alternator is also suspect, an open diode will cause ripple that electronics doesn't like.
Make sure that the EBL P4 board is firmly seated in the MEMCAL socket.
RBob.
Alternator is also suspect, an open diode will cause ripple that electronics doesn't like.
Make sure that the EBL P4 board is firmly seated in the MEMCAL socket.
RBob.