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Wanting to share good advice I previously obtained from this bulletin board: Couple of weeks ago a posting described an easy DIY protocol for cleaning injectors, when your SAAB run poops for no other obvious reason than injector malfunction.
My experience was, that the engine intermittently used only 3 of the 4 cylinders and responded hesitant to throttle. Alltogether a weird performance, which I ascribed to severe interior damages as a result of overfilling engine with oil following an oil-change. (I had a posting concerning this issue a few day back; the replies I got was reassuring it could not be overfilling oil causing my SAAB to run poops, thanks guys, you were right).
Desperate to find another (- and less expensive!) explanation for the deteriorated engine performance, I successfully undertook injector cleaning according to this protocol: Uncoupled ignition-coil from 12V, lifted boot over air-meter, took injectors out of manifold, and bypassed fuel-pump relay by connecting terminals 30 and 87 in the fuse-box. Now when lifting air-metering plate, it was very clear, that one of the 4 injectors did not perform as the others, spray-pattern was weaker and not conical. Lifting air-plate all up to allow for max fuel-spray (into a bucked) for a while restored injector performance entirely, so all four would feed cylinders equally. And best of all, when running the car afterwards, I almost feel I’ve got a new SAAB.
My last remark on injector: I previously used several mix-in-fuel ”injector-cleans” to no avail. Just a waste of money. The above procedure will cost you nothing more than an hour of your time, and it is well worth it…
By the way, my SAAB has an 8-valve B2012I engine, and this engine provides easy access to injectors, in contrast to all the 16 valve engines, where you will first need to remove ”top-cover”/valve-cover/whatever-that-cover-is-called (- too bad!).
Mike
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