Hi new member here

I have a 1973 Volvo 164E and some problem with uneven running,i have a new auxiliary air regulator,pressure sensor checked,new rubber o-rings on injectors,valves checked.co checked,temp sensors for coolant and air checked and test to drive with out throttle valve switch connected,fuel pressure is 2,2,and i will check filter in tank soon,every rubber hose is new,all help is welcome.Robert

Hi Robert,
Welcome to Jetronic.org!

I don't understand in full what you mean with 'uneven running'.

Does the engine stall for some time or what does happen?

You should check the MPS with a vacuum pump like Volker describes here: VIDEO
Regards
Norbert

Hi when I start the car when it’s cold it goes a little ruff like it not goes on all cylinders,and if I press gently on gas pedal it also nearly stall but it is a little better when the engine gets warmer,but it never goes smooth it’s a little shaky but it goes well on acceleration it’s not easy to explain it better maybe I can recording it tomorrow when I start the car.Robban

And I have test different mps

Hi Robban,

just shortly as I am on vacation. Which ECU, MAP sensor and fuel pressure do you have? Has your igntition been tested?

Hi ECU ends with 009,mapsensor 015
And I have a new 123 ignition and its checked most problem is when i start its like it don’t go on all 6 cylinders it’s a little hard to rev it up and after 3-5 min it’s goes a lot better but not perfect

Hi,

ECU and MAP sensor are correct for a European engine. Also fuel pressuere fits with 2.2 Bar. How did you check your MAP sensor?

With ohmmeter and a vacuum pump,
Pump it up to 5 and it would not go under 4,5 in 10 seconds

Fuel pressure 2,2