Date: Wed, 04 Mar 1998 20:37:23 -0500
From: John and Michelle Zeller <>
Subject: Re: '90 Saab 900, rough morning idle

Saab85900 wrote: > > >I also have been losing antifreeze for the last year. Not quite as > >much as yours, more like 1 quart in three-four months. I cannot find any > leaks, there is never any antifreeze on the garage floor, I never notice any > odor and the oil is not contaminated. Its very mysterious, indeed. I've asked > the dealer about this and they are clueless. > > An oil sample of used (at least 1000 miles) will let you know if there is > coolant in the oil ($15-20). Since there is no "coolant fairy" slipping down > in the middle of the night, sipping up the anti-freeze, it must be going > somewhere. If it isn't internal, then it has to be external. A good shop will > have a dye they can put in the coolant. Drive a while, then put the car on a > rack and use a blacklight to find the source of the leak. > > Dick in Falls Church, VA THANKS TO ALL THAT HAVE RESPONDED.... I just recently changed the wires, plugs, and cap. My wife "thinks" that improved some, but it's pretty subjective. Injector cleaners and dry gas appear to help. Now that I have you all interested, I'm taking closer looks. I am seeing a little green on the floor - but cannot see where it's coming from. Looking further..... Someone suggested to me to check the oxygen sensor(s)? Their thoughts are that the computer is not reading the correct mix at initial startup. When I think back, I could have swore that I sensed the "choke" closing once - I'm assuming the computer reacts similarily. Question on the Battery. Are you saying that if the voltage is low, the power to the distributer might also be low?? Same with slipping belts? Again thanks for the advice. John Zeller

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