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Sounds like clogged fuel injectors 1 Saabers Like This Post! Posted by walt [Email] (#2707) [Profile/Gallery] (more from walt) on Mon, 29 May 2017 15:43:16 In Reply to: Re: Runs great, then like crap...bad cat?, K-Saab [Profile/Gallery] , Mon, 29 May 2017 07:47:37 Members do not see ads below this line. - Help Keep This Site Online - Signup |
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/
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