Volvo Owners Club Forum - View Single Post - 1800:

ACESRR · Dec 11th, 2023, 13:06

The car is an 1800E with the D Jetronic. The car wasn't idling very well so I have gone through the process of checking the idle adjustment (throttle stop screw & throttle position sensor) which were all fine. I also clamped off the auxiliary air valve plus checked for a vacuum on the brake booster. However, I find that I can still screw the idle adjustment screw all the way in and the car still runs.

I therefore put a smoke generator on the induction manifold to see if there were any air leaks and found smoke was coming out of the steel blanking plug on the rear end (nearest the bulkhead (firewall). If I run the engine and put my hand over the blanking plug I can feel a suction.

Is there meant to be a sealing washer or O ring to seal off this blanking plate or am I going to have to wipe some JB Weld (or similar) round it to seal it off?

Dec 11th, 2023, 13:06	#1
ACESRR New Member Last Online: Jan 4th, 2024 12:06 Join Date: Apr 2023 Location: Romford	Induction Manifold The car is an 1800E with the D Jetronic. The car wasn't idling very well so I have gone through the process of checking the idle adjustment (throttle stop screw & throttle position sensor) which were all fine. I also clamped off the auxiliary air valve plus checked for a vacuum on the brake booster. However, I find that I can still screw the idle adjustment screw all the way in and the car still runs. I therefore put a smoke generator on the induction manifold to see if there were any air leaks and found smoke was coming out of the steel blanking plug on the rear end (nearest the bulkhead (firewall). If I run the engine and put my hand over the blanking plug I can feel a suction. Is there meant to be a sealing washer or O ring to seal off this blanking plate or am I going to have to wipe some JB Weld (or similar) round it to seal it off?