1990 Honda Civic "running lean" Questions

444,000 miles runs rough after 300 miles after changing plugs and coils have you pulled any plugs after running? See if you are running lean or rich. Could be o2 sensor

...running rich the whole time. Some manufacturers put in a rev limiter that kicks in if the MAP/MAF sensor goes bad, so I'd lean that way first. Clean the electrical connector with contact cleaner, and ...

...lean test i check the ECT , then fuel pressure. the fuel pressure is 10 tests on a V6. I can also test the MAP in 5min with a voltmeter, to see if its right. here is the list , Good voltage 12vdc to ...

now it wont run once the choke opens Check for a Vacuum leak , Sounds like its leaning out . Split hose on the manifold , Loose Carb that sort of thing. Hope this helps

...civic cx my honda seems to be running lean. its shooting out black soot and white smoke . does anyone know how to fix that. yea, you are burning oil. piston rings, or an oil leak from some where ...

code p1361 lean mixture dies after running for 2-3 minutes Please share more history on what was done to the car before it started to do this

...running on the very lean side side. closed loop operation should be bouncing from 250mv up to 800mv. a major cause of a lean condition like this is a vacuum leak. check out all of your vacuum lines. ...

...running rich This can be cause by airfilter clogged up,to a failed MAP sensor to a coolant temperature reporting lower temperature than it normnally is,to a leaky injector or pressure regulator, or a ...

...running way too leak starving for fuel so it hunts for 2 reasons < ISC hunting, and lean does that. lean is gross power loss and opening throttle bogs the engine. so is double bad. ISC makes it ...

...car is running realy rough could you tell me what this is and if it is costly to fix? get 02 sensors tested-they monitor rich n lean conditions--chec for any vacuum leaks-they dont show up on ...