Have you changed out plugs or wires recently? if not its possible that these are original and that you need to replace them, now just take a quick look at the coil tower post for the number four cylinder, sometimes the post and the inside of the plug wires will be dirty or corroded and also re-seat the plug wire on to the #4 plug it might just have a bad or dirty connection. If this is a fuel injection system then go down to Autozone purchase a can of Sea foam ($10) just bot mine yesterday.. and fill up gas tank half way, then put in can of Sea foam drive it around for about 20 minutes and get on it ever so often, drive safe though please.. you might get lucky and it might just be a clogged injector. Can i get a very helpful thanks!
Testimonial: "You think like I do so I put in all new parts sparkplugs, wires, coil, cap n rotor, still same problem. Please tell me more. "
does this run on a fuel injection system? and what type engine? v-6 3.8 4.3? if its fuel injected and you didn't replace the injector then i would suspect that. Have you ever ran the car low on coolant or oil or had and oil pressure problem? Im thinking a leaking head gasket maybe might need a cylinder pressure check. Does the car run good even though the check engine light is on? if it runs poorly you could try and disconnect that injector and see if it still runs the same, if it does, it could be the injector. Is the fault resetable and then comes back? you could have a clogged injector...did you run a can of Sea foam with the gas yet. that might clean it up. Spending $10 first on the fuel additive is what i would try... it will save you money and time if it fixes it.
wouldnt you know it, im having the same problem you are on my old 89 beretta that i gave to my daughter for her first car to drive. She was complaining that the red coolant light was on and had Been on for awhile, well i found out that almost all the radiator fluid was gone and i cringed!!... because you know what that means!..well i found out first why it boiled off..the thermostat was closed stuck i put my hand on the upper radiator hose and no fluid was going through.. changed thermosat out, it was toasted, and the radiator cap was all worn as well, filled back up and you could tell it was missing on a cylinder, well i rev'd it up and saw my worst nightmare! a light water smoke Cloud coming out the exhaust, well no further explanation needed, i believe everyone knows what that means..and to confirm it saw a little water in the oil as well. Well the car has 297,000 miles on it I said if i could get 300,000 i wouldnt complain that i really got my moneys worth out of an american car and it would be worth more for parts than it is now, but i tried a quick fix...yes i poured some stop leak in the radiator and if definately confirmed a gasket leak!!! i ran it on the freeway for about a good 15 miles and it ran like new, but i came to an intersection and had to wait a real long time and it started to run rough again, so what i think your suposed to do is run it hot to seat the liquid (only one can by the way any more and then you"ll be needing a new radiator) and then shut it off and not run the car until then next day to let the stuff seat up wherever...now as you know this is a temp fix..in the future it probably will come back to haunt me...because my daughter didnt know how important it is to maintain your car. if you dont maintain a car it will cost you and cost you big. If anyone out there has more experience with trying to stop these leaks or a good brand i"ll probably flush radiator and try one more time if that dont do it well i"ll have to decide weather to keep it or get rid of it. Please let me know now i need help this is my first blown gasket!
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SOURCE: 2000 CIVIC System too lean Cylinder 3 and 4 misfire Deteced
SOURCE: 2003 Dodge Ram 1500 computer codes
P0304, could be a bad plug, bad coil, bad injector, low compression, or other stuff. The P0700, you need to look at codes in the TCM. It is telling you that the trans computer has a fault in it.
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.
Testimonial: "Very helpful diagnosis"
SOURCE: I have a cylinder #4 misfire code #P0304 on a 2000
Try this first: change spark plug for that cylinder and replace spark plug wire for same cylinder.
SOURCE: P0304 code-Misfire on cylinder 4
A P0304 code means that the the car's computer has detected that one of the engine's cylinders is not firing properly. In this case it's cylinder #4.--------
Symptoms may include:--------
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A code P0304 may mean that one or more of the following has happened:
If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.
If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.-----------------
This should help.Thanks.Helpmech.
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