Date: Wed, 21 Apr 1999 09:38:16 -0500 From: "muzbuz" <nashtn212nopsamAM.aol.com> Subject: Re: Intermittant lean out
Have your mechanic check the grounding. I had this very same problem. The ground wire was corroded and frayed. After fixing that, I've never had the problem again. Benton Quest wrote in message <7fd31v$em5$1nopsam2.ee.net>... >I have a vexing problem with a 1986 SAAB 900, 8 valve, base model. >Every once in a while, usually the second start of the day, or when just >cruising along, with no warning, instantly, the car goes lean, and power >drops way off. >It can come back to normal instantly, so I think it is an electrical >problem. It only does this about 5% of the time, not enough of a bother to >take it in, but I have lived with this for 15 months. > Sometimes the tach will drop dead when this happens, and sometimes the >tach drops dead and the car will not lean out. The tach has a mind of its >own, sometimes working fine, sometimes dead. Sometimes the tach will turn >on/off with the turn signal, but not always. > In this lean condition, the car will respond to revs and WOT, but it is >hard to get rolling from a stop. It is not a fuel pump issue. I hot wired >the pump so I can turn it on from the dash. I believe the ECU is getting a >bad sensor signal and telling the regulator to lean out. It may be the >ignition pulse amplifier. But this condition is only occasional and instant. >It is really weird. > >
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