Date: Sun, 21 Dec 2003 05:52:30 GMT From: John Anderson <jvandersonnopsami.com> Subject: Re: 92 900S rough at 3000 rpm
LanceM wrote: > 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 > Thank you. I have the Bentley and will be investigating this week. I will post results. Regards, John
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