My 2000 GMC Safari will misfire sometimes and when i stop at an intersection it will idle rough then runs ok What is the cause of this ?

SOURCE: 2000 GMC Safari anti-lock brakes

There was actually a recall for this. Go to your local GMdealer and have them check your VIN for a recall. If not under recall get out of there its easy to repair yourself don't let'em fool you.Remove the front pads caliper and rotors. Locate the abs sensor mounted to the wheelbearing assembly by a small socket head cap screw (Allen wrench). Removethe bolt and softly gently/wiggle the abs sensor around until it pops upout of the hole. some will break, which is why it wouldbe nice if the recall applies to your vehicle that way if they break gm replaces. Once you get both sides removed, clean themounting surface of all rust or build up with w-d 40 and small steel toothbrush then wipe off excess with clean rag and mild soap and warm water, dry completely make sure no spray residue exist on parts, Next apply a thin layer of lubricant grease to preventfuture rusting and reassemble.The rust build up under the sensor is causing the angle to change resultingin inaccurate wheel speed readings in the abs module your abs module will interprets this asa wheel is either slipping or skidding and applies your abs. This should make you happy with no more irritations. Please rate me. If you need further assistance you can always ask me. Good luck with this.

SOURCE: Tacoma 4cyl idles rough, heditates, multiple misfires

Possible fuel delivery problem, fuel pump, fuel line, clogged fuel filter, leaking injectors or injector O-rings, faulty pressure regulator etc. Check your fuel pressure.

SOURCE: BMW Z3 rough idle on start codes read P1189 , P0173

all the codes you have are all related to the fuel trim, this problem needs to be looked at with a european capable scanner for futher tests sorry.

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SOURCE: hello. my 2000 4runner v6 has been running rough.

Change your oxygen sensors - they're responsible for feedback that the computer uses to determine the air/fuel mixture. They usually are good for about 60k miles and then start to go downhill. When they get to a point that the computer won't trust them, it ignores them and runs on preprogrammed fuel maps that run excessively rich (too much fuel) to safeguard the engine. You've probably seen a decrease in fuel mileage as well. And the O2 sensors have to be up around 900 degrees before they'll work - the car ignores them until then. That's why you run fine after a cold start but run rough once the car is warmed up.

The O2 sensors you want to change are in the exhaust system between the engine and catalytic converters (the "pre-cat" sensors). There are O2 sensors after the cats as well, but those are used comparatively to determine how well the cats are functioning. The primaries are the ones used for fuel mixture. If it's been this way for a few weeks or so, I'd put new spark plugs in as well - rich fuel conditions can foul them and contribute to the rough running.

SOURCE: 2002 Ford Taurus SEL, DOHC Misfiring

Disconnect the battery completely, try turning the key with the battery disconnected. Put the battery back together. The check engine light should be off now..