Question about 1998 Ford F150 Regular Cab

1 Answer

New plugs an wires,coilpak what else could

New plugs an wires,coilpak what else could misfire on multp. cyls.

Posted by on

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points


    An expert that got 10 achievements.


    An expert that got 5 achievements.


    An expert whose answer got voted for 500 times.

  • Master
  • 1,077 Answers

This is the only possible ideas I can thing of :

Fuel injectors, related wiring, sensors and computer issues
Running out of gas, or poor fuel quality
Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
Incorrect Fuel Pressure
EGR system concerns: leaking EGR valve or restricted ports
Base engine concerns: low compression, valve train problems and timing issues
Ignition module or related wiring issues
Ignition related sensor faults or wiring issues

I know you did these two things:
Faulty spark plugs
Faulty coil or related wiring

Posted on Apr 14, 2009

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

2004 Sorento began with code P0305, cyl #5 misfire. Inspected and replaced plugs, wires, and coil pack on cyl #2. Repair shop told me cyl #5 injector bad so they replaced. Still has misfire.I suggeste

If you had code P0305, I don't know why they would have done anything to the #2 cylinder but if they have already replaced the plugs, wires and injector; here are a few more items to check:
1) Check connections from ECM. Look for any corrosions or bent/broken pins.
2) Check the fuel line pressure
3) Check the engine compression
4) And if the above are good, then you will probably have a defective ECM

Nov 28, 2014 | Cars & Trucks

1 Answer

What are theses codes for 99 Chevy Prizm 171,300,302,304?

171 Sys lean bank 1 possibly o2 sensor 300, cyl misfire detected random cyl. 302 misfire cyl # 2. 304 cyl misfire cyl #4 with all 3 of these codes it might be time for new spark plugs and wires

Sep 03, 2014 | Cars & Trucks

1 Answer

02 Toyota Tacoma when engine warms up cylinder 3 has a misfire po303

check spark plug of the cyl. switch plug with another cyl, run engine until warm to see if misfire still comes on. if it stays on the same cyl. fault could be high tension wire or coil or worse leaky valve or rings. if misfire switched to the other cyl just change plug or better replace all plugs

Mar 16, 2014 | Cars & Trucks

1 Answer

Cylinder #1 continues to Misfire

What DTC code(s) are you getting?
You performed a compression test on cylinder #1; did you test cylinder #2?
Compare the readings, if there is a significant difference in compression readings between the two, you may have a bad head gasket, a bad valve, etc.
The bottom line, the problem is internal to the engine.

Dec 09, 2013 | 2002 Buick LeSabre

1 Answer

After changing plugs wires and coilpak #3 plug has misfire

Would think you may have replaced the wires on
the wrong plug

Have to mark both ends of wires with a ball point,
as you remove them & make a drawing of distributor
cap, before your start

You should have all your reference material weeks in advance
of any auto work or repairs,can't guess or ask later

Dec 06, 2012 | 2001 Ford Windstar

1 Answer

4th cylander keeps misfiring new plugs and wires

first question is it a four cyl? or six did u change the coil pack plug wire if a four cyl? did u use ngk plugs to replace the plugs? or it may be a fuel inj you would have to swap fuel injs with a different cyl to see if it follows the inj or stays with the cyl, if it stays may need to diag that cyl further compression check etc

Feb 03, 2011 | 2003 Mitsubishi Galant

1 Answer

2006 dodge caravan, 6 cyl. relaced cole, sparkepugs and wires in oct. 2009. Engine is reading #2 cyl. misfire again. Why

Firts time swap spark plug & ignition coil between two different cylinders and read again if the same #2 cyl. misfires !
If #2 cyl. is OK and another cyl. misfires then spark plug or ignition coil is out of order and must be replaced.
If #2 cyl. misfires again then #2 injector must be checked !
If ignition coils & spark plugs (complete set for 6 cyl.) are replaced then you must check #2 injector !

Mar 15, 2010 | 2006 Dodge Caravan

1 Answer

When engine temperture gets to approx. 212 degrees

when was the last time you replaced your plug wires?

Jul 05, 2009 | 1998 Jeep Wrangler

1 Answer

03 Dodge Ram 1500, 4.7ltr, Ongoing mystery with the 0307 misfire code, so far tried new plugs and new coilpak, considering replacing that injector? Is that the right direction to be looking in? Also the...

I believe you have the numbers right. Replacing the o2 sensor will not cure a misfire. This problem is specific to this cylinder only. A problem with the injector is far less common than ignition components, but very possible. What I would do is get the fuel sys depressurized and lift up on the fuel rail. Remove #5 and #7 injectors. Look at the tops of them to see if they're plugged with nasty stuff from somebody's tank or sugar or other contaminant. If they're clean, swap them and see if the misfire moves to cyl. #5. If it does, you found your bad injector and solved the problem. While you're in there, do a compression test.

Jul 04, 2009 | 2004 Dodge Ram 2500

1 Answer

04 Sedona 3.5 cyl #2 misfire replaced coil,back again 5 mos later

How many miles on the plugs and wires? Misfire can be caused by either plugs or wires, after that check the injector for that cylinder. Let me know what u find. Curt

Mar 11, 2009 | 2003 Kia Sedona

Not finding what you are looking for?
1998 Ford F150 Regular Cab Logo

168 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ford Experts


Level 3 Expert

75822 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22156 Answers


Level 3 Expert

5501 Answers

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

Answer questions

Manuals & User Guides