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Registered
Join Date: Mar 2002
Location: Philadelphia, PA
Posts: 12,682
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CIS component........
Bill,
Your '81 SC USA model's WUR is 0-438-140-090. This particular WUR is not vacuum assisted. If you know and understand how your CIS works particularly the fuel pressure system, using an after market digital WUR is acceptable. Provided you know how to calibrate this unit. Using an OEM WUR that is correctly calibrated would be much simple. If after installing your new digital WUR, and you are still having some sort of problem, contact me and I'll lend you one to use for your test.
Tony
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