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Checking CO Mixture with Dwell Meter 200 1988

posted by  someone claiming to be Greg Sievert on  Sat Feb 19 00:02 CST 2000 [RELATED]

Hi All. I've done it before on another 240, and I'm trying now to check the CO mixture with a dwell meter on our "new" 88 240 (B230FT with LH2.2). Per the manual, I brought the car up to temp, and I have the dwell meter hooked up to the pink test lead in the engine bay. I get no reading unless I rev up the engine (to say 1500-2000 RPM) at which point I still get nothing. When I close the throttle, as the engine drops back to idle, the dwell meter gives one blip (for about a second) then drops back to zero. Any clues? The dwell meter is OK because I checked the operation of the air bypass valve with the other test lead and it functions fine. I guess I should check to make sure the O2 sensor is hooked up--didn't think of that earlier.

The reason I'm even bothering to check the mixture is because we just put in a new mass air flow meter (remember previous posts?)

On a positive note, the car runs great, has plenty of oomph, and is looking better now that I have blacked out most of the chrome trim.





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