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I replaced the pump myself. Subsequently got a MAF sensor or ciircuit leaan error. Bought a new one and waited for engine to act up before changing the MAF. No improvement after change. I think this may be a symptom and not the problem. I'm wondering if I have a vacuum leak because the car will intially fire quickly, rev up and stall. Each successuve attempt the engine runs longer until it will settle down to an uneven idle. Can sometimes stall by stepping on the brake. Also replaced plugs, wires and O2 sensor (long overdue) and crank sensor (read numeerous posts about it causing problems). Going to try injector "O" rings next. Mechanic scanned car when its running and components look OK. Thanks.
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