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3.0L ford engine misfired now check engine light stays on.

Engine sat overnight in garage ,started engine ran rough for few seconds then leveled out but check engine light stays on.

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  • Cars & Trucks Master
  • 5,495 Answers

You can take it to an Auotzone, Advance, or Oreilys parts store for a free scan. They can then reset the computer and tell you what the old defect was.

Please rate my info.

Posted on Dec 04, 2012

6 Suggested Answers

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Posted on Jan 02, 2017

  • 80 Answers

SOURCE: 2002 Ford Ranger check engine light indicating misfire

Code P0301
Ignition Coil Pack
Ignition Cable
Spark plug
Clog or dirty fuel injector
Evap canister purge valve
Engine Compression
fuel pressure

you have 3 type of engine for your truck
2.3L 4 cylinder
3.0L 6 Cylinder
4.0L 6 Cylinder

need to know that type Engine

The reason why the service light come on because it is a hard code
not a soft code.

Let me know

Posted on Sep 20, 2009

StormStrikes
  • 104 Answers

SOURCE: engine misfires

You didnt mention having changed the spark plug wires, so that is another item that could be culprit as well. As well, it could be a coil pack that is not working properly.

I cannot recall at the moment if that model year uses coil on plugs or if it uses coil packs. Either way, if it uses a coil on plug set up, take the one for the #3 cylinder and move it to say #4 or anyone of your choice and see if the misfire follows

If it uses coil packs, there is likely one coil pack that controls two cylinders. In that case just swap the coil pack with an adjacent one and see if the problem follows. Pay attention to where the spark plug wires go because it will be an issue if you get them mixed up. You just swap the coil packs around.

I would, however, start with the spark plug wires if you have not changed them already.

Posted on Dec 31, 2008

  • 2 Answers

SOURCE: 1996 Ford Windstar engine runs rough

DIS ignition, no distributor to " get in there " with....

Posted on Jul 10, 2009

  • 1986 Answers

SOURCE: wrangler check engine light

If the light was flashing when it came on, then it means your engine is misfiring.

A solid light can mean anything from a loose/faulty gas cap to a transmission issue.

This light comes on when the computer detects a fault of some sort in its diagnostic tests. If it keeps detecting this issue, the light will remain on. If the light turns off, then it has detected that the issue may no longer be present.

In order to find out what the exact reason was for your light, You need to have your car computer scanned to retrieve the code that the computer would have stored when the light triggered. Most garages will do this free of charge. The code will tell you what may have caused the light to initially turn on.

Posted on Oct 07, 2009

  • 11800 Answers

SOURCE: 2003 camry shows some smoke on startup for a few

If that smoke is white then it's probably nothing more than the water from  the combustion gases that has condensed on the exhaust line, nothing to worry.

Posted on Jun 25, 2010

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