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Alrighty, I've got a problem which has suddenly taken a turn for the much worse. My car had been running poorly when cold, ie. crappy surging at cold idle, acceleration bad when cold. These symptoms recently started getting much worse. The car now dies around 10 times when started in the morning before finally warming up. I can keep it from dying at all but applying slight pressure to gas pedal. When driving while still cold, the engine runs very badly, doesn't accelerate well, hesitates and such. When its warm, the idle is still pretty bad, shakes the car noticeably, and dies maybe 30% of the time when I stop at a light. Running above 1000 revs, the car seems to run pretty good, but not great. Has decent power and such.
Checks I've done. I backprobed the O2 sensor while plugged in with engine running, and it was bouncing up and down randomly in the .1-.9v range. The range is acceptable, the O2 sensor is working, but I don't know if the bouncing is acceptable. Today, I uplugged the AMM, and the idle ran perfectly smooth. Of course it ran like crap above that because of the limp home mode, but the idle was very nice. Made me want to kiss the car. I'm guessing the AMM is bad. I checked the recommended terminals on it, and the heated wire terminal read like 4.4 ohms. The haynes says it should be 3.5-4.0. Would this reading be so far out of spec as to warrant replacement of the AMM? What are your ideas? Thanks for the help!
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