Question about 2004 Ford F150

1 Answer

Changing spark plugs.engine not idling properly

Posted by on


1 Answer

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Just did this 3 days ago. Went smooth heard many horror stories about it though . Also after I removed the computer to reach the back passenger side plug and put it all back together idle is very low @600 RPM but runs smooth.
I would look up the recommended procedure for changing plugs before attempting

Posted on Sep 05, 2010


1 Suggested Answer

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017


Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

2006 Chevy Aveo Acceleration Issues??

If it was running properly before you changed the spark plugs and wires, check to be sure you have the wires routed properly from the coils to the plugs - correct wires on correct coils. It sounds like you may have a couple of wires crossed. Also, some engines are particular about the type of spark plug used. Check with your local Chevrolet dealer to see if the type plugs you used have been known to cause problems with the engine.

May 01, 2017 | 2006 Chevrolet Aveo


How to fix EPC light ON from AUDI

The best ideea is to scan your Engine Control Unit with a VAG-COM, Bosch KTS, ... diagnosis tool. If you have one of these dedicated scan tools you will find definitely the engine fault code-"P...." and the clear description of the error. Also you can try to erase this error (or these errors) from the Engine Control Unit memory. If errors are "sporadic" type you certain have permission to erase them, also for some kinds of "static" errors. Because your Engine "MIL" - Malfunction Indicator Lamp keeps coming "ON" and "OFF" you have a big good hand to clean errors from Engine Management System memory. If you don't have any diagnosis tool, you can also try something else. For check up if the engine have a proper turn, you can successively disconnect each spark plug coil from the engine wiring system, engine idle, car stationary. When you operating this you must be free of chassis ground (battery ground)!!! When you disconnect a spark plug coil and the engine speed (rpm) drops, that means this coil works properly. When one coil disconnected and engine speed (rpm) still remain unaltered, this coil (or spark plug) is out of order. First you can change only the spark plug and check up again. If no changes the coil is defective and must be replaced! My recommendation is first to change all spark plugs on the engine, and after that check up coils.

on Dec 19, 2009 | Audi A4 Cars & Trucks

1 Answer

Rough idling

fuel injectors may be clogged and not spraying properly

May 27, 2013 | Dodge Neon Cars & Trucks

2 Answers

My 93 olds cutlass ciera keeps misfiring and stalling, i have change the spark plugs, fuel filter, o2 sensor, maf sensor, and still stalls and misfires any ideas?

For engine misfiring problem check the help links mentioned below. Click the link below to go through the troubleshooting procedure :---- Engine misses and truck jumps? Hard to down shift? Issue with high gear only?

Bad miss at idle?

While stop engine idles like cylinder missing?

Engine Misfire codes for car?
Engine Misfire codes?

Misfire on cylinder 4?

Oil on spark plugs and car misfires?


This will help.


Feb 14, 2012 | 1993 Oldsmobile Cutlass Ciera

2 Answers

Shaking problem

possibly could you spark plug wires or distributor faulting you will need a mechanic or a manual to adjust the distributor or just get new spark plug wires

Jul 06, 2010 | 1992 Honda Accord

2 Answers

Do a tune up

You'll need to remove in take manifold to get to the spark plugs.

Jan 08, 2010 | 2000 Mitsubishi Montero Sport

1 Answer

Engine hunts and wont idle properly

If the RPM's fluxuates at an idle at all times you have a bad spark plug or a bad spark plug wire

May 29, 2009 | 1990 Isuzu Trooper

1 Answer

Won't run much raster than idle speed

Since there is no background to this, I assume at some point in time, the motor ran ok for you...

The first thing to do is to drain one of your carburators into a glass jar to check for water. If there is water, you will see it separate from the fuel in a couple of minutes. The water is on the bottom. If there is water, you will need to flush the motor with good fuel, one carburator at a time and probably will have to pump your tank.

If there is no water, the easiest thing to try is the following...when the motor starts to bog down, activate the choke. (If you have a side mount box that activates the choke when the fast idle lever is all the way up), you will have to have someone go back to the engine and manually pull the choke lever out. If the motor picks up, the motor is most likely in need of a carb job.

You can then do a cylinder drop test while motor is idleing, momentarily pulling the spark plug wires off of the spark plugs one at a time. If you pull one off and the engine speed does not change, listen for spark at the spark plug connector to the engine. If you hear the clicking of spark spark is probably ok. The issue with that cylinder is probably fuel related...probably a clogged carburator. If one carb is not functioning correctly, they all probably need some work. If you are not into mechanical stuff, you should have a dealer do the work. After the carbs are cleaned, they need to be adjusted for proper idle and idle/air mixture as well as vacuum balanced . If you are going to attempt it yourself be sure to by a manual either from Honda or one after market.

Before the carb job, a good dealer will always do at least a compression and spark check to be sure there is not an internal issue. The spark plugs should be checked at this time and changed out if they look questionable. Only use NGK DR7EA spark plugs not a substitute.

Also, check your oil and be sure it is clean and at the proper level.

There are several other things that it can be, but this is the most common.

May 03, 2009 | Honda Civic Cars & Trucks

1 Answer

2000 Dodge Dakota Sport V6

Did you properly gap the plugs when you changed them? Improper spark will cause really rough idling at low RPM like that.

Aug 02, 2008 | 2000 Dodge Dakota Quad Cab

Not finding what you are looking for?
2004 Ford F150 Logo

Related Topics:

286 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts


Level 3 Expert

76164 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers


Level 3 Expert

5520 Answers

Are you a Ford Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides