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2005 5.4l rough idle very rough at 1800 smooth after 2000

New plugs,boots 2 new coils

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  • Anonymous Oct 02, 2012

    Some 2005 5.4 especially Expeditions have defective fuel injectors from the ford vendor many years ago & are starting to stick open. Just went thru that last week with a relatives suv. I like too replace the front O2 Sensors on all fords at 100,000 before they fail

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  • Cars & Trucks Master
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The engine and the automatic transmission (transmission control is only for automatics, engine is still computer controlled no matter the transmission type) in this vehicle are computer controlled and in most cases when a fault occurs a fault code is stored in the memory of the computer control module. There are exception to this, such as the Mass Airflow Meter and fuel pressure problems. What must be done is to have all the basic testing done such as a scan of the system for fault codes as well as a check with a live data scanner tool for engine functions that are not within range of normal, a trained technician is required to know what is correct and what isn't, then based on careful diagnostics done from a factory repair manual the correct part is replaced or the wiring repaired or the computer replaced (known as the PCM), which is very rarely the problem. Other basic checks must be done as well such as mechanical problems with the engine as well as engine state of tune and mileage on the engine. The transmission can have mechanical issues as well such as no gear engagement at all or a failed pump or other pressure related problems.


Posted on Oct 02, 2012

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Posted on Jan 02, 2017

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Anonymous

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SOURCE: 91 Jeep wrangler New everything idles rough, no Power then dies

you check for miss how is compression

Posted on Aug 29, 2009

Anonymous

  • 1 Answer

SOURCE: P0302 #2 cylinder miss fire code. Replaced plugs

I have a 1999 ford escort 2.0, its got a miss on cylinder 3 and 4. I changed the wires and the coil pack but its still missing. When scanned I get code p1506, p0303 and p0304

Posted on Jan 11, 2010

john h

  • 22437 Answers

SOURCE: O2 Sensor Problem?

yes an o2 sensor can cause those symptoms so can a minor vacuum leak --bad ignition wire -clogging fuel filter --sticking egr valve etc.

Posted on Mar 01, 2010

klintsnow

  • 4 Answers

SOURCE: My 2000 Alero 2.4 has a very rough idle while

I have the same problem and I found it today. On the front of the engine there is a 4 inch l black 1/4 inch hose that goes from the air intake to a sensor. Its right in the very front it might blend in with some wires and other hoses but they are bigger. That hose is probably coroded and falling apart. Look for it when the engine is running and there will be a suction on that hose and it will be sucked flat instead of round. If you touch it the car might die or sputter even more. Replace that hose with any tubing and away you go.

Posted on Apr 24, 2010

ifred878

  • 1 Answer

SOURCE: 2000 toyota 4runner pulling a random misfire in

I have a 2000 4Runner 4 cyclinder 2.7 misfires at idle only.

Posted on Jun 27, 2011

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