Question about 1998 Ford Contour

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Engine miss fires

My timing system went on the car and i fixed it myself and now the car miss fires and it isnt the spark plugs

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  • harri31 Jul 02, 2008

    I sprayed some gm combustion chamber cleaner in my L4 2.0 now the car misses at low rpm 2000 and 3000 what could i do about this? I have changed spark plugs and also tried some fuel injector cleaner.

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Check the mass air flow sensor at the clean air intake!!

Posted on Jul 09, 2008

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I am on a mechanics collage course 3 possible things wrong
1. ECU
2. timing slightly out
3.Cold Start Sensor needs changing

Posted on Jun 23, 2008

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Posted on Jan 02, 2017

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My car is missing need the wireing diagram for a 2003 mitsubishi galant es 2.4 ltr.


From the timing belt to the transmission the fireing orders are 1234 One and three fired the same time 2 and 4 fire the same time. Pull all the plugs for the spark plug on them and lay them across the top of the motor with plugs in them you can see which ones fire at what time. The spark plugs need to be touching a grounded part of the engine to fire. This also will help you find out if you have bad wires.

Apr 01, 2014 | 2003 Mitsubishi Galant

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Changed plugs on a 1999 f-150 engine now I have a engine miss


check you dont have a broken lead removing them one at a time with engine running will show you which cyl is not firing check plug wasnt cracked when being fitted change lead double check firing order if the engine didnt miss before the plugs were changed then this course of action should fix the miss its easy to cracl spark plugs when fitting if the plug socket does not have rubber insert carbon leads only need to be pulled to hard or bent to far to damage the carbon fibers that run through them check that you dont have two leads crossed this is a common mistake with v8sand is easy to do

Apr 06, 2011 | 1999 Ford F150 Regular Cab

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My husband did a tune up on my car yesterday and now it wont start it will turn over like it wants to start but it wont he said that its miss firing we have bought 3 new coil packs and still will not start...


If your car is miss firing and your husband changed the coil packs,the wires leading from coil packs to sparkplugs must have got crossed.This will change car timing which will result in the car miss firing.He needs to go over wiring and correct problem for car to run right.You can go online to autozone.com and type in Info about car to get the correct wiring layout.Your problem isnt the new plugs n wires.Its the wiring layout.

Feb 09, 2011 | Pontiac Grand Am Cars & Trucks

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Miss firing and /check engine light fregrently comes on


These have a lot of problems with ignition coils, so replace the spark plugs with the proper Motorcraft Spark plug, and a scanner will be needed to show which cylinders are misfiring, replace those coils. Make sure the misfiring cylinders when you take the coils out , that there isnt any water/coolant in the spark plug well.

Nov 23, 2010 | 2000 Lincoln Town Car

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Engine missing wont fire properly, i think its the spark plugs how do i change them ?


CHANGE SPARK PLUGS.YOU NEED SPARK PLUG 3/8 SOCKET.YOU NEED SHORT AND LONG 3/8 EXTENSIONS.YOU NEED SPARK PLUG BOOT PULLER AND A SPARK PLUG GAUGE SET THE SPARK PLUG GAP.NOW CHANGE 1 SPARK PLUG AT A TIME SO YOU MIX THEM UP GET FIRING ORDER MIX UP CAR BACK FIRE WONT CRANK.ALSO CHANGE PLUG WIRES ALSO.

Nov 10, 2010 | 1994 Honda Civic

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2000 cadillac sls v8 northstar cylinder 7 isnt firing and already put new sparkplugs in and still isnt firing.whats next


iginition coil needs to be replaced. By for about 150 to 200, and take the Northstar cover off and replace. Very easy fix. Car will then run like a jet engine.

Sep 07, 2010 | Cadillac Seville Cars & Trucks

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Engine missing out


  1. check the battery .
  2. check engine oil for dilution .
  3. check piston ring and engine piston that are corroded .
  4. Change oil engine oil. Check the ignition system.
  5. check the spark plug and set the firing order of the spark plug.
  6. check the cooling system with its thermostat. To your 1989 old mobile cutlass.

Jun 20, 2009 | 1989 Oldsmobile Cutlass Ciera

1 Answer

Car not running on all cylinders


the first thing that comes to mind is ignition system faults. Are the spark plug wires connected properly, in the right firing order? Has work been done on the distributer, or the engine head, recently? Ignition timing can be 180 degrees out, and the engine will still run, sometimes. If it is not the ignition system, the next most likely culprit is the head gasket, which seals the head to the block of the engine. If this gasket is breached seriously, it can cause a cylinder(s) not to fire. Is there water in the oil, as evidenced by a thick, white foam? Is there oil in the coolant? Either of these are symptoms of a leaking head gasket. 
Basically, one cylinder isnt firing for one of a number of reasons. The most common cause is an igntion fault. This will cause the engine to feel and sound "lumpy", and the power would be greatly reduced. The best way to find the cylinder which is responsible is quite simple but care must be taken. Firstly if you hate electric shocks as much as I do, find a proper pair of electricians insulated pliers, and even some decent rubber gloves if you can aswell. Start the engine, and one at a time, use the pliers to remove a lead from the top of one spark plug, if the engine almost stops, or gets worse in any way, it is not that piston which isnt firing. Repeat the proccess, one at a time, you will know which piston ISNT firing when you remove the plug lead, and there is no change in the engine sound, this is your defective cylinder. Its just a case then of looking at the condition of the spark plug and asessing the cause of the misfire before carrying out repairs. BEWARE:- THE LEADS WHICH CONNECT TO THE SPARK PLUGS CARRY SEVERAL THOUSANDS OF VOLTS - HENCE RUBBER GLOVES AND INSULATED PLIERS 

Mar 05, 2009 | 2004 Pontiac Sunfire

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