odd surging - Saab 900 Bulletin Board - Saabnet.com
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odd surging
Posted by dave c. [Email] (more from dave c.) on Fri, 29 Jul 2005 10:50:19
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92 900s w/auto 162k miles
while driving at speeds ~45-70+ on occasion rpm will start to fall off a few 100 rpm and then speed back up again. Usually does it only one occurance per trip on the highway. it does this surging several times and then quits.Is a gradual drop off and up again, not sharp. Only notice during cruise speed,not taking off. Its not the amm, tps, aic, lh control unit. Car is fullly warmed up also. A/C is off so its not compressor.No difference with amount of gas in tank. Noteworthy items but not likely the cause of this, 02 code - bad sensor also the cat is removed by previous owner....Minor amounts of oil in coolant but as yet no coolant in oil. also runs 3/4 hot after about 20 miles of driving. Indicative of famous head gasket leak. Any worse, and am wondering if its better to do a headjob or just put in my spare engine/manual trans. The auto thus far runs great, and its a break from shifting all the time.Ideas anyone???? Thanks
posted by 24.154.188...
Posts in this Thread:
- odd surging, dave c., Fri, 29 Jul 2005 10:50:19 <-- Viewing This Message
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