Car recently started getting an issue in which it has misfires after running for a while and then, coming to a stop, and accelerating above 50 mph. It is throwing codes for misfire cylinder 1 and 4, multiple misfire, and bank one sensor one o2 sensor. I looked and the sensor had been damaged beyond repair. I replaced the upstream o2 sensor and I am still having the same performance issue. Should my next step be to clean the TB and IAC? There doesn't seem to be an obvious vacuum leak in the intake manifold. Am I missing something?
The first you should be taking when getting error code should be to replace the faulty spark plugs and their respective wiring. Also check for faulty distributor and ignition coil. If everything till now is fine then and only then go for cleaning throttle body.
Testimonial: "The plugs were said to be new and the car wasn't misfiring when it was purchased. I guess I can check to see if they were gapped properly. Wires look brand new. I'll have to check all of that this weekend."
SOURCE: 2000 CIVIC System too lean Cylinder 3 and 4 misfire Deteced
SOURCE: My 2000 honda civic has two error codes coming up,
well i would replace the o2 sensor and find out why you got a cylinder 3 misfire,most likely plugs and wires will do the trick
SOURCE: IDLING PROBLEMS ON 1992 ACCORD EX
Im having the same problem.my car has a idling problem.it goes up t0 3 on the rpm & then back down to 0?help anyone?
SOURCE: Check engine light
Sometimes can be prematurely dirty air filter, sets off the air flow sensor, which sets off the o2 sensor. So might try new air filter first and erase codes and then see, before you spend more bucks than you need; then if codes return, do the flow mix sensor.
SOURCE: 1994 honda civic 1.5 16v stalling after pressing accelerator from idle
Another place to look is your IAC, or Idle air control valve. It is bolted to the back of the intake manifold, and can be removed and cleaned. It is usually the cause of most Honda Idle problems.
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