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940 turbo hesitates, almost stall

740 fixed, now 1991 940 turbo hesitated and almost quit while wife driving yesterday. Not accel or decel related, happened under normal driving conditions; randomly for about two seconds at 1 or 2 mile intervals. About 6 months back I replaced the fuel pump relay and radio suppression relay. Just before that I told a mechanic to replace the rpm sensor while diagnosing an intermitant no start problem which I found to be the rs relay after he could not fix it (I hope he replaced rpm sensor - he's out of business now).

I'm thinking lose wiring or rpm sensor related. Car starts fine. Any ideas?






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