I am completely out of ideas on this...
Problem:
During acceleration, it almost stalls unless I go easy on the gas. At speed, no issues.
Lower chamber fuel pressure is not to spec (sometimes), not always. Will go back to 4.9 Bar sometimes.
Tests done:
Upper chamber fuel pressure: 5.4 Bar
Lower chamber fuel pressure: 4.6 Bar <---
too low!! Sometimes will go back up to 4.9 bar. Its random, I can't tell why. -
Swapped the EHA with a spare one...SAME PROBLEM, so I can probably rule the EHA out.
EHA current fluctuates (-)3.6mA to (-) 2.2mA. Ignition On/Engine Off: (+)20mA.
Duty cycle is 50% fluctuating
Fuel Volume test out pressure regulator: ~1.5L/40sec.
Coolant Temperature Sensor checks out: 1.4k Ohms at 36C ambient. 290 ohms at Operating temperature.
Potentiometer reads: 7v +0.1v.
----
I'm stuck here...What could be the issue here that is causing the lower chamber pressures to be whacky?