Date: Wed, 10 Nov 2004 18:58:41 -0500 From: "dave" <alofusblountmaybenospamel.net> Subject: Re: 1992 saab conv 2.1
"PAPAGENE4JACK" <barberirealtynospamcom> wrote in message news:9743006558ff93a3530b63a53c3135eenospamlhost.talkaboutautos.com... > OK when I say rough I mean at Idle. It Seems to smoth out at higher > speeds. But, I can still feel the roughness. Electrical new plugs rotor > wires and cap. > I am told that the fiament in amm is suppose to have a glow to it. Also I > did diconnet the wire to amm car would not run it just stalled out. > thanks again gene > For a car that runs rough at idle, but smoothes out at speed, I would suspect a vacuum leak of some sort. If at speed you still feel rough or low power, I'd pull the plugs and see if one is misfiring. Occasionally the plug wires will ground or crossfire. Check this by pulling the plug cover off, starting the engine at night and looking for fireworks. Similarly pull the distributor cap and rotor, throw them away and put new stuff in. Is the idle control valve working correctly? Did you use a SAAB O2 sensor? I've not had real good luck using other than oem parts for those. Usually for an O2 sensor a good brushing will get them working again. If you must check the AMM: The book says pull the hose off the front of the AMM. Run engine to operating temperature. Rev engine to 2500 rpm and shut engine off. The AMM wire should glow for about 1 second. If you pull the AMM connector and the engine dies, the AMM is probably good. Keep in mind that if you got a bad tank of gas and sucked some water up into the injectors it will take some time for that stuff to work out. dave
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