Question about 2002 Ford Explorer

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What could cause it to idle rough

Changed coil pack, gaskets, and tps sensor.

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No codes? In the following order I would clean the idle air control, change spark plugs, check plug wires, check for vacuum leaks, run some fuel injector cleaner through your fuel tank.

Posted on May 27, 2014

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Posted on Jan 02, 2017

SOURCE: what causes 2000 taurus engine rough idle but no codes

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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1 Answer

Why a 2002 ford explorer idles rough?


Several things can cause rough idle on a Ford.

Check all vacuum hoses for, first of all, that they are there, and then that they have not been chewed by mice or squirrels (that happens), or rotted away (that happens too).

Check the coil pack(s) for corrosion at spark plug terminals, check plug wires--at night, the darker the better, raise hood with engine running; blue sparks or lightning jumping around the wires and plugs means your wires are dead--check plugs for fouling or tip wear, if your car has over 100,000 miles check catalytic converter and fuel filter, and check the TPS. The throttle position sensor monitors where the gas pedal is, and since most of the time, it is at the place that makes the car go 55, or idle, the TPS can get worn in those positions and send false signals to the PCM. Fords of that vintage also used a pulsed air feeder that can cause rough idle and is very difficult to service.

Best bet is vacuum leak first, then spark, then fuel, then the out-there stuff.

May 07, 2014 | Cars & Trucks

1 Answer

What would cause my 2002 ford explorer xls to idle rough


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.

May 06, 2014 | 2002 Ford Explorer

3 Answers

What causes 2000 taurus engine rough idle but no codes


remove neg. cable from battery so the ECM will reset this may work. make sure the IAC is air tight. if this doen't fix your problem have someone check the IAC valve if it's bad the part runs $300.00 pluse

Nov 25, 2011 | 2000 Ford Taurus

1 Answer

1994 camry idols rough.was told it could be tps or coil pack check engine light was on and went off after we changed spark plugs but it still idols rough.what could this be?


Actually, in today's cars on the road, a check engine light can mean literally hundreds of different things on the engine or transmission.

I would have the car scanned to see what codes have been stored in the computer to get a clue as to what is wrong with the vehicle's engine.

A rough idle could be caused by a coil pack, a tps problem would be more like a miss on acceleration kind of symptom.

However, before changing expensive parts, it would probably pay to have the codes scanned.

Aug 29, 2010 | 1994 Toyota Camry

3 Answers

97 buick lesabre 3.8 Idles rough and stalls out.


Fuel injectors go bad on these engines, you can find re manned ones for 30 bucks. If you have an engine light on get that read. Change your coil/wires/plugs also. Is the lower intake manifold gasket leaking coolant yet? You may want to get that replaced also. Check the TPS too (throttle positioning sensor) those will also cause your engine to act up

May 08, 2010 | 1997 Buick LeSabre

5 Answers

My 04 f150 had a rough idle and would sometimes stall out. dealer said it was throttle body so I replaced. The idle is still rough but it it doesn't stall. Could it be a coil pack? if so do I need to...


I have a 2005 f150,with a 4.6 and it idles rough and when you turn on the ac it wants to die. Checked the codes and there are no codes.Any suggestions?

Apr 30, 2010 | 2004 Ford F150

1 Answer

Recently I had my 2000 gmc 2500 6.0 liter truck start running rough. I changed the spark plugs, checked the coil packs and replaced the fuel pumpand fuel filter. Still no change....Any suggestions?


ROUGH IDLING CAN BE CAUSE BY MANY THINGS.I AM LOOKING AT LEAKING VACUUM HOSES OR INTAKE MANIFOLD GASKET LEAK.DIRTY FUEL INJECTORS AND WORN ENGINE VALVES WILL CAUSE ROUGH IDLING.ALSO LOW IDLE SPEED CAUSE ENGINE TO RUN ROUGH.

Apr 18, 2010 | 2000 GMC New Sierra 1500

1 Answer

Rough idle


check you throttle position sensor first then fuel pressure regulator, then fuel pump. i have a 92 and had to recently do a massive overhaul. my rough idle was caused by a malfunctioning tps with a small exaust leak causing it to race and an intake manifold gasket. also check your idle speed adjustment settings.

Nov 18, 2008 | 1992 Toyota Pickup

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