Question about Cars & Trucks
Changed maf ran great but when it warmed up ran bad and got p0304
DTC P0304 Code - Cylinder #4 Misfire Detected
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:
the engine may be harder to start
the engine may stumble / stumble, and/or hesitate
other symptoms may also be present
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
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.
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Posted on Feb 24, 2012
Seems to be a misfire code, you could have a partially clogged injector. You can have them tested at a local car shop.
Posted on Feb 09, 2012
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Posted on Jan 02, 2017
Are you useing the recommened grade of fuel, the Taurus will have cold start issues if prem. fuel is used when 89 octane is recommened, saw this many times while working for ford.
Posted on Nov 02, 2008
It is either your throttle positioning sensor (most likely) or your pre-cat o-2 sensor. But most likely your throttle body which only costs like 50-60 dollars i think.
Posted on Apr 11, 2009
I think you need to have the transmission filter changed, and right away. If that doesn't solve the problem, then have it tested at the transmission shop. Rick
Posted on Apr 15, 2009
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