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1996 buick century idle rough

Changed plug and wires and double checked firing order and its rite

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  • Contributor
  • 16 Answers

Try cleaning the idle air control valve in the throttle. also clean the throttle plate.

Posted on Jul 18, 2013

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Posted on Jan 02, 2017

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SOURCE: firing order

that is true your firing order is wrong here is a link to a web sight that has all the 1998 explorers 6cyl just click on the one that your explorer is and it'll show you the correct firing order also make sure you have your plugs gaped right good luck.
http://autorepair.about.com/library/firing_orders/bl-ford-firing-98.htm

Posted on Mar 22, 2009

cadman000
  • 607 Answers

SOURCE: 1990 Buick Century 3.3L Check Engine Light comes on, stalls.

Need to check for fault codes. Possibly a faulty sensor causing the fuel system to run rich or lean.

Posted on Mar 27, 2009

  • 79 Answers

SOURCE: rough idle

Barring any mechanical issues you most likely have a failed injector.

Posted on Aug 14, 2009

  • 2 Answers

SOURCE: 2003 Yukon, rough idle, extreme power loss,code

My brother had a similar issue with his Ford F-150, he needed the fuel injectors replaced. Good Luck!

Posted on Sep 30, 2009

  • 77 Answers

SOURCE: 1996 Honda Accord Rough Idle Even After tune up

Perform a valve clearance inspection and adjust if necessary. Tight or sticking valves will cause a misfire or rough running concern. Note: Perform valve adjustment when the engine is stone cold. 4cyl: INT 0.26mm EXH: 0.30mm (V6 engine are hydraulic and no adjust necessary.) Also check for a sticking or stuck open EGR valve. For diagnostic purposes only: Remove the EGR valve. Place a business card over the EGR passage and bolt the EGR valve back on. This plugs the EGR ports and if the misfire goes away the EGR valve is partially stuck open and is defective.
Check for low fuel pressure. Check for low compression. Check cam timing. Check for a weak ignition coil. Also don't over look the possibility of worn or broken engine mounts which cause excessive engine movement and engine vibration. -hope this helps

Posted on Mar 05, 2010

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1 Answer

Engine runs rough when idling


Check the firing order, The push rod has 2 differnent sizes for intake and exhaust, If they get switch you get the rough idle

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I have a 1988 Buick Century Custom with the 3.8 Liter V-6. It idles rough. Plugs are good Ing wires good. Any suggestions?


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Check the firing order.
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Dec 13, 2009 | 1992 Buick Century

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I changed the plugs on the car, it ran rough now it wont start, it backfires through the carb


i bet you have put the plug leads on the wrong plugs?? have a close look at your fireing order to see if im right,,,

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Buick Century 97 runs rough and stutters when cold and gas applie


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What is the firing order for 1988 Buick Century 6cyl


The firing order for a 4-cylinder 2.2L Buick Century is: 1-3-4-2. The distributor rotates in a clockwise direction, with #1 plug wire located at the upper left of the distributor The firing order on a 3.1 v6 is simple. 1-2-3-4-5-6 See a diagram of the 3.1 and 3.8 here. http://www.2carpros.com/forum/1999-buick-century-spark-plug-firing-order-vt177159.html http://autorepair.about.com/od/enginefiringorders1/

Jun 11, 2009 | 1988 Buick Century

1 Answer

Car problem


Double check the back side plug wire connections, the side closest to the fire wall. Sometimes it's hard to get the plug wire to go on all the way. Use dielectric grease in the boots and re-install. Double check your firing order. It's easy to accidently cross one, especially on the DIS systems. The coil packs should be numbered. Check for accidentally unplugging a sensor. Hope this helps.

Jun 09, 2008 | 1996 Buick LeSabre

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