Flat spot during acceleration

Hi,

pressure drop from 2.1 to 0.6 shortly after Ignition OFF is too fast.

Rheostat on D-Jetronic ECU only affects as long as idle-run contact on throttle switch is closed. Please remove electrical connector on throttle switch and try again.

Hi

Thank you for your information !
I understood there is no relationship between brake and engine control.

I am still wondering why idling condition obviously worsen when shifting "D" only.

Appreciate your usual great advice !!


JUN

Hi Dr-DJet,

Thank you for your advice.

I will disconnect the electrical connector on the throttle switch and see differences.

I think the throttle switch has never been adjusted properly when replaced it with new one during engine overhaul work 2 years ago.
I will try to adjust the throttle switch as well. It looks very difficult for me thought... 

BTW about the fuel pressure, I also think dropping pressure is too much. 
I changed the fuel pressure regulator with new, Fuel pump (3 ports type) replaced with new last year.
While engine is running the fuel pressure keeps 2.1 (some time drop to 1.8 momently)
I better to doubt the regulator and pump ?

I attached pics of the engine room. If you could let me know something wrong with the hose routine etc. it would be highly appreciated.
I am wondering if the blow-by gas hoses are correct routine.

Notes: I have disconnected the electrical connector from the air temperature sensor. And the hose between the diaphragm on the throttle valve body and AAV was disconnected. This is temporally solution to get better idling.

Thank you in advance for your support.

JUN