| 126 running rich
Tutone and Flavio, thanks for the comprehensive advice. My car is a Gen I euro; 117961 engine type. There are no air distribution tubes for the injectors; no EGR valve in the manifold; no rear control valve at the back of the engine (that I can see); no idle mixture adjusting screw like the one present on my Gen II euro 420SE EFI with full pollution controls. The Oxygen sensors are present one at each exhaust manifold down pipe and connected to a two prong wire on each side. The spark plug wires are BERU and look recent and all are firing properly when pulled off engine running showing strong spark. Instead of the idle adjustment screw (Gen II) I see a large size half a dollar size cap with a notch on one side atop what I think is the fuel pressure regulator or idle valve and which I think is adjustable with some special tool. One hose with an inline electric valve of some sort goes to the fuel distributor. When I got the car the plug in connector to this valve was disconnected; if I connect it; the idle speed goes really bad. This car starts at the first click every morning and cold start valve seems working alright; idles fairly smooth with a noticeable small shake and starts good when warm. |