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Calling someone who knows something about the fuel system... 700 1988

posted by  Az on  Sat Jan 5 03:21 CST 2002
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Hey all,
I recently (this morning) built (and installed) my kit A/F meter. Basically i am trying to diagnose some problems with my car, when the car is "mid warm up" it splutters really badly (for something like 1/2 to 1 second...)when floored. According to my "test light" (LED installed using the test point for the Oxygen sensor in the engine bay) my car is running rich at idle the whole time, yet, my newly installed a/f meter goes from 14.7 (perfect) to about 15.5 (lean) at idle.... what gives? The A/F meter is hooked up right, i know that, 'cause it works! (And it's accurate at idle with a reference of a DMM). Now, when i floor it mid-warm-up, it goes LEAN, i mean the A/F guage is updated slowish (well, the bar graph is quick, rest is not) completely lean, as in off the scale, till it stops "spluttering" and then it's fine. Whenever i suddenly floor it (hot or cold, althought it doesn't hesitate when hot) It always goes lean. I thought it should go RICH when floored. What gives here? I don't understand, as the reading off the ref point of the ECU is definately different to what i am getting!!! My bosch ECU LH 2.2 number ends in "544" i can't remember whether or not these modules have problems! Please help me!
Thanks !
Az







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