Swapped out 05 for 01 ford ranger 3.o. Having problems runs rough,fried cats. Any advice where to start?

Part 3 -How to Test the Ignition Module and Crank Sensor ...

easyautodiagnostics.com > Ford > 2.3L

Mar 1, 2012 - Spark plugs for cylinders #2 and #3 get spark at the exact same time. ...voltage -12 Volts) to both individual ignition coils within the coil pack. ... Ford Mustang or Ranger (or 2.3L Mazda B2300), this is what you'll need ... for this 'Switching Signal' at the coil pack... but you can also test this ... 1991, 1992, 1993.

How to Diagnose a Misfiring Cylinder (2.3L Ford Ranger ...

troubleshootmyvehicle.com > Ford > 2.3L

Apr 3, 2012 - Bad Fuel Injectors can cause a Misfire Condition. ... the ignition system on the 2.3L Ford Mustang or Ranger consists of 2 ignition coil packs, ...

2002 ranger misfire rough idle - Discussion on Topix

www.topix.com > Ford Ranger

Jul 27, 2007 - My truck is giving the code misfire in number 4 cyl. I replaced my spark plugs, Wires, Coil packs (both of them) and all my fuil ... three (3.0L v6) go bad, the fuel/air mixture gets messed up. Judged: 2. 2 ... My truck runs rough only at idle. ...code for ford ranger 2002, 2.3 5speed. truck runs like a champ but that ...

Extremely stumped! I need the best and brightest 1994 Ford ...

answers.edmunds.com > Edmunds Answers

Could be that your cat is clogged up,the way to check is to remove and look in both ends,mine clogged up and caused my head gasket to blow between cylinder 3 and 4 on my 85 Nissan 720,part of the inside came apart and was blocking the air flow,causing my exhaust plugs to blister.

1994 Ford Ranger Workshop Repair Service Manual PDF Download Don't worry I'm sure you will get the solution of your problem, just check the link I attached

by removing the cat converter and not fixing the fault you have created more problems for yourself
all you had to do was have the fault codes read to find the problem
running rough and over heating cat indicates flooding from problem injectors or excessive fuel pressure

have u changed fuel filter

You don't need to change the computer as long as you used the same size engine and since it runs I assume you do. Have you checked the voltage on the battery to see if the alternator is working? And what codes do you have in the computer that is turning the CE light on. It is likely that you just have a bad connection on one sensor or one that is bad.

What kind of spark plugs did you put in it? The 4.0 litre engines in these trucks require PLATINUM spark plugs. If you put the wrong ones ( regular copper) it will miss fire and run like a bag of garbage. I had a similar problem with mine, the previous owners said "oh we changed the plugs and wires". They also changed the ignition coil not long before I took delivery. So, truck still ran like **** they said they even had to reset the inertia switch under the passenger side kick panel, everyone thought it was a fuel problem. I decided to pull one plug and volia..Wrong plugs. That also explains why they had to change the ignition coil. Hope this helps.

Hi check all the fuse. fi the fuse are ok . remove the coil pack and reverce if the cly missifire change replace the coil if not chage replace the electronic comtrol module ok.

check your cat convertor

1991-1994 2.9L and 3.0L Engines Firing Order 1-4-2-5-3-6 1995 And Later 3.0L V-6 With DIS Ignition System Firing Order 1-4-2-5-3-6
4.0L Engines Firing Order: 1-4-2-5-3-6 DIS Ignition System