- Sun Apr 04, 2021 6:26 am
#49462
Hi All
Some ideas on this issue would be appreciated.
I am running a 0.4.4b board on an old Rover SD1,originally L-Jetronic,using speedy with original hardware.
Anyway i now have fuel and spark, speedy is driving a BIP373 to the OE coil and locked distributor.
Tuning is going well apart from this voltage variation issue. If you check the attached log, with the engine idling the voltage moves approx 0.3 v at random, in synch with this the pulse width, coolant etc moves, causing a very slight stumble.
I have checked the supply voltage at the board with a scope, it is not changing.have also taken speeding power supply and earth direct from the battery via a relay switched by the oe system.
Could this be a faulty component in the battery reference circuit?
Some ideas on this issue would be appreciated.
I am running a 0.4.4b board on an old Rover SD1,originally L-Jetronic,using speedy with original hardware.
Anyway i now have fuel and spark, speedy is driving a BIP373 to the OE coil and locked distributor.
Tuning is going well apart from this voltage variation issue. If you check the attached log, with the engine idling the voltage moves approx 0.3 v at random, in synch with this the pulse width, coolant etc moves, causing a very slight stumble.
I have checked the supply voltage at the board with a scope, it is not changing.have also taken speeding power supply and earth direct from the battery via a relay switched by the oe system.
Could this be a faulty component in the battery reference circuit?
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