Sounds like clogged fuel injectors - Saab 900 Bulletin Board - Saabnet.com
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If clogged, engine will run when cold, but won't run as fuel computer shortens injector opening time as coolant sensor signals a warm engine. You may be able to fool engine into running again by putting a 2000 ohm resistor on coolant sensor harness to signal cooler engine temp. Before engine dies, it will be running very lean. This would be indicated by close to zero volts on oxygen sensor at connection near cabin air intake and battery distribution block. Plugs also will have white ash on porcelain insulators around center electrode tip. Distributor rotor may blow out its internal 1000 ohm resistor. One bad tank of gas can plug injectors. Or using E85 gas. Or using fuel system cleaners after running low detergent cheap gas. One place that cleans injectors with before and after test reports is: http://www.witchhunter.com/
posted by 216.196.21...
Posts in this Thread:
- Runs great, then like crap...bad cat?, Jawerdna
, Mon, 29 May 2017 07:18:35- Any news? n/m, U2bC, Sun, 4 Jun 2017 18:01:19
- COMMON PROBLEM... TEMP SENSOR on manifold, Used to be Chaz, Fri, 2 Jun 2017 08:16:36
- Re: Runs great, then like crap...bad cat?, Bernie
, Mon, 29 May 2017 17:51:58 - Re: Runs great, then like crap...bad cat?, K-Saab
, Mon, 29 May 2017 07:47:37
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