Date: Sat, 20 Dec 2003 15:15:25 -0600 From: LanceM <spambucketnopsamo.com> Subject: Re: 92 900S rough at 3000 rpm
John Anderson wrote: <snip> > > I am fairly competent around an auto - I don't have any special > tools (exepct for the gearshift housing tool) for the SAAB. > > How do you check the Throttle Position Sensor for drop-out? > > Regards, > John You'll need something like a multimeter to measure resistance. Remove TPS conn harness at TB. One probe on terminal 1, other on terminal 3 (of TPS itself, not the wiring). Completely open or close the throttle _very slowly_. Should see continuously variable ~1100 - 3000 ohms resistance, w/o any drop-outs. Can more definitively ck voltage: steady power, variable signal, and ground at TPS and ECU, w/an oscilloscope (above is fairly good, tho) Alternatively, can get another TPS new or used (Bosch PN is on TPS, and the exact same part is used on _lots_ of early 90s imports) Bentley service manual highly recommended for DIY Lance -- alancemor....AT..yahoo.....DOT...com
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