Question about 2002 Ford Explorer
Changed coil pack, tps sensor, and gaskets
What engine do you have? is check engine light on? You said you changed coil pack, but what about spark plugs? could be fouled by normal wear, improper application/plug gap, oil fouling (oil residue on electrode) caused by bad valve guide seals or bad piston rings or gas fouling(electrode wet with gas) caused by bad plug, wire, injector, O-2 sensor. Could be caused by a vacuum leak (hose or intake manifold/gasket) Check all vacuum hoses for cracking/chaffing, repair as needed. with engine idling spray carburetor cleaner at base of intake manifold watch for rpm increase if so there is a vacuum leak. Could be stuck open egr valve, Could be compression problem or timing chain problem. This is the best I can do with info you provided. Hope it helps.
Posted on May 07, 2014
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Posted on Jan 02, 2017
SOURCE: idle issuse
You need to clear the codes from the ECM, and re-run diagnostic code. If you still have codes
Check your grounds. If you still have power issues, re-check your wiring or firing order. If you have spark only on 2-4-6, where is your 1 - 3 - 5. If I remember correctly those vehicles have double ignition modules. One for the right bank and one for the left bank. But not sure. When was the last time you change your spark plug wires? Your PCV? Fuel Filter? Air Filter?. As for your cam shaft sensor, run a coninuity test on the harness and ensure is working correcty. Why did you change the ECM, those things hardly go bad, unless you disconnected it while you had power going to it. Probably nothing wrong with the old one.
Ensure you don't have vacuum leaks (PCV Valve, EGR Valve) Check your fuel pressure if you can. Suggest you change fuel filter. Could be partially clogged and not allowing the proper atomization of fuel. (Also did you gap your plugs correctly or just threw them on as is?)
Posted on Oct 31, 2008
you probably have a vacuum leak and by the sound of it, it idles rough with the brake pedal depressed its your brake booster
Posted on Sep 08, 2009
It could be many other things. Have you changed the air filter? I could be extremely dirty or it could even be a vacuum leak that is making it run rough. Is there a check engine light on? If so that could help find the problem. If it's not something that simple you would need to start looking to see if all cylinders have the correct compression because it could be a blown head gasket or some other internal engine problems. Let me know if you have any further questions. Thanks for using FixYa!
Posted on May 15, 2010
Testimonial: "thank you.. and yes the engine light is on and flashs sometimes.. the code read that i had 4 misfires before i changed the plugs and wires & coil "
I had a head gasket going when I have a rough idle. Just weeping coolant past the number 1 cylinder. When I pulled the head the piston was all shiny and steam cleaned. $500 dollars all good now.
Posted on Nov 04, 2013
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