I've replaced the coil pack and plugs and wires and it runs good for about two weeks, then the engine has a miss in it when it idles and stumbles on acceleration [i've replaced the coil pack,plugs and wires for this same problem twice]
- If you need clarification, ask it in the comment box above.
- Better answers use proper spelling and grammar.
- Provide details, support with references or personal experience.
Tell us some more! Your answer needs to include more details to help people.You can't post answers that contain an email address.Please enter a valid email address.The email address entered is already associated to an account.Login to postPlease use English characters only.
Tip: The max point reward for answering a question is 15.
If you shoot me your year I might have the info you need. And - depending on your year - the 94ish years had TWO coil packs for the 4 cylinder - 8 plug wires basically. When any of the leads of either of those coil packs goes out - youre going to experience a miss condition. If it's the v6 - you've got a cam sensor that can cause that type of action - and have you checked your throttle positioning sensor? If that goes out - the ecu will get mixed signals and can act like that as well. If you can tell me the year I'll see if I got the info you need. All the best.
A code P0304 may mean that one or more of the following has happened:
Faulty spark plug or wire Faulty coil (pack) Faulty oxygen sensor(s) Faulty fuel injector Burned exhaust valve Faulty catalytic converter(s) Running out of fuel Poor compression Defective computer
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.
Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.
is the car missing when driving? 2000 and on has coil over plug's there are no wires. Is the check engine light on? if so go to an Auto Zone parts store or one that will scan the car computer for free and get the codes out to pin point the problem. Sounds like the cars miss firing. it could be more than one coil and or plug going bad. Did you replace any coil packs? Bad coil packs are 90% of all miss fires on todays cars and trucks.
things that can cause it to miss.
fouled plug (checked)
ignition signal to coil pack( switch old coil pack to a working cylinder to make sure its good and you may find a possible short in the wiring to the coil pack) alternately check the voltage to the wires going to the coils make sure like colors have like voltages. im not too big into ford trucks but thats a good start for most vehicles
possibly injector stuck open and flooding cylinders
timing could be off
you could have bad plugs and wires.clogged fuel injectors.and low compression.leaking intake.this is a list of possible causes for cylinders miss.do a compression test.it will pin point problem quickly.
I would remove one plug at a time, plug it back in wire and lay on top of engine block. Have some one crank and look for spark. Do this for each plug. If 1 is missing. You have bad wire. If two sparks are missing, then you have bad coil pack, if 3 is missing, you have two bad packs or bad module, if all cylinders are missing, then module or cranks sensor is faulty. Dont forge to change those plug wires just as often as plugs. They may look good still, but they get weak
Ok odds are you just need a routine tune up. Plugs, fuel filter, air filter. Now this engine uses coil packs i think, so you wont have normal plug wires. The coil packs are individual and sit directly on the plugs. So it is possible you have a bad coil pack. These engines were known to have this problem in excess. So try the cheap fixes first. plugs, fuel filter...these two is the best two to try first.. The air filter wont cause a bad miss unless it is completely dobbed up. so just for your own good to change the air filter.Now if neither the plugs or fuel filter fixes this car try this. Each coil pack will have an individual plug on top of them. So listen closely to your engine. Unplug each coil pack one at a time, Now evry time you unhook a plug the engine should miss, so unplug one at a time, and if the engine does miss they are working properly. Now if you unhook one of these and there is no change in the idle of your engine, my friend you have found the problem. All you have to do if you find one that does not change the engine idle, you just go buy a coil pack and replace it. This should fix you right up