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99 neon misfire error code 43....how to fix

Rough idle when cold...sputters a little on the hiway....sets "service engine soon" light after 15 min driving....then lite will blink a few times...car really goes with 90 percent power-drives ok.....what would be the fix? After complete warmup, starts idling fairly smooth, holding about 800 rpm (steady)

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  • Cars & Trucks Master
  • 75,066 Answers

43 ignition control circuit not responding

Possible bad igntion control module (built into in PCM)

Posted on Oct 31, 2012

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6ya6ya
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Posted on Jan 02, 2017

ZJLimited
  • 17970 Answers

SOURCE: 02 f150 5.4 dtc p0307

A code P0307 may mean that one or more of the following has happened:
* Faulty spark plug or wire
* Faulty coil (pack)
* Faulty oxygen sensor(s)
* Faulty fuel injector
* Burned exhaust valve
* Faulty catalytic converter(s)
* Running out of fuel
* Poor compression
* Defective computer

Possible Solutions:
* If there are no symptoms, the simplest thing to do is to reset the code and see if it comes back.

* If there are symptoms such as the engine is stumbling or hesitating, check all wiring and connectors that lead to the cylinders (i.e. spark plugs). Depending on how long the ignition components have been in the car, it may be a good idea to replace them as part of your regular maintenance schedule. I would suggest spark plugs, spark plug wires, distributor cap, and rotor (if applicable). Otherwise, check the coils (a.k.a. coil packs). In some cases, the catalytic converter has gone bad. If you smell rotten eggs in the exhaust, your cat converter needs to be replaced. I've also heard in other cases the problems were faulty fuel injectors.

Ford's will sometimes flag the wrong cylinders on misfires. Usually a coil will fix Ford's misfire. Spark tester to me just verifies that the the circuit is good. Dont relay on this to say the coil is ok.

Keep us updated.

Posted on Feb 02, 2011

  • 15 Answers

SOURCE: V6 engine idles rough after restarting, then smooths out

My first guess would be a dirty carb/fuel injector set. Run some fuel cleaner through the tank and see if it gets better. You might have to do it through a couple of tanksful. How long since you've had a tune-up? It might just be that time.

Posted on Nov 15, 2008

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Check engine light flashing check engine soon smell of gas and not running smouth


Check engine light flashing means there is a bad misfire , it flashes to tell you your damaging your catalytic converter . You need to have it check , you don't won't to have to replace the catalytic converter . Can cost up to $1,000.00 . Flashing Check Engine Light CarMD

Feb 03, 2016 | 2004 Cadillac Deville

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How do i fix my Mercury Villager 2002 with random misfire?


How to Fix error code P0300 for random misfires on your car ...

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Oct 15, 2010 - How to Fix error code P0300 for random misfires on your car ... amisfire (code P0304) on a 1999 Mercury Villager 3.3L · How to Fix error code P0500 ... I reset my codes and it ran fine for a couple of days, then I started getting ...

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Rough Idle - 2000 Mercury Villager - RepairPal

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Repair the code issue, because your Villager has OBD-II which is a very helpful Diagnostic system. Upvote (4) ... My 1999 Villager was running poorly; rough idle, lack of power at highway speeds and the engine problem light indicated random miss-fire, etc. I had new spark ... Have code po306 cylinder 6 misfire detected.

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Dec 17, 2015 | 2002 Mercury Villager

1 Answer

How do I fix, bad idle in suzuki swift , check light on, no codes.


the title is contradiction
" check light on, no codes."<< totally wrong
scan it one more time with a REAL scan tool this time. (there are DTC errors , or codes as you said)

what does bad idle mean? misfiring, or idle speed too low
or too high? RPM, or
surging?

say what that means please.
and more important is engine hot or cold ? failing.???? or both????
there are over 50 causes.
but can be broken down to simple physics and gauges.
1: engine bad, lost compression.
2: engine cant breath, dirty air cleaner
3: ISC stuck closed or open or just stuck. (bad idle air supply)
4: bad spark, 1 or all 4 (never had a tune in this decade.
5: cam drive, slipped (belt) causing #1 failure.
6: air fuel mix too lean, and causes rpm drop and ISC fails.
7: air fuel mix too rich and misfires.
8: egr stuck open, it misfires and ISC gives up.
9: cat clogged, engine cant breath #2 like.
10: and the vast other reasons for misfire.

we cant drive it, see it or hear it misfire, so.....????

there is a test for all 10, ask. or get car serviced.

Jul 29, 2015 | 2010 Suzuki Swift 1.6

2 Answers

Engine light flashing running rough


Read the fault codes and replace faulty units.

Apr 04, 2013 | 2004 Chevrolet TrailBlazer

1 Answer

Got a Code 43 on my 1992 Buick Regal Custom.


sometimes is hard to get there and cost a lot of money.

Mar 08, 2013 | Cars & Trucks

1 Answer

99 neon: random misfire-error code 43-runs choppy-poor gas mileage


No Engine I know of has a 1,2,3,4, fitting I am sure you have the firing order connected wrong, plus your description point to the firing order as well. Cheers, Malcolm Campbell.

Apr 18, 2017 | 1999 Plymouth Neon

1 Answer

Check engine light on, vibration at idle


Generally, the problem is in the emissions or something that is affecting the effectiveness of the emissions, but other causes can trigger the light to come on, too. To determine the cause, the vehicle will need to be taken to AutoZone or a shop that has an OBD2 scanner, or for 1995 and earlier models, an OBD1 scanner, While a scanner will not give you the magic answer, it will give you a code that narrows down the problem area.
Some specific causes for the light to be on are:
Gas cap left off, not tightened, not installed correctly, or needs to be replaced.
02 sensor.
Engine misfire - error might clear itself after 3 complete warm-up cycles; not restarts, but warm-ups.
At start up for a bulb check - Should not stay on.
Details here: http://www.chinasinoy.com/service/why-would-a-check-engine-light-be-on-62.html

Car rough idling causes
misfiring engine is among the most common causes of a rough idle. You may notice your car idling roughly when it's in "Park" or when you're driving it and stop at a stoplight. A rough idle can be caused by damaged spark plugs or spark plug wires or a burned-out valve. It's important to address the cause as soon as possible to avoid potentially damaging the engine. Engine repairs are almost always expensive.
Learn more here:
http://www.chinasinoy.com/service/car-rough-idling-causes-and-how-to-fix-it-108.html

Hope this helpful.
Best regards.

Oct 12, 2011 | 2004 GMC Envoy

1 Answer

2003 ford f 150 4.6 v8 and the idle went from smooth to rough also sputters and sluggish while driving check engine light is flashing.


have the vehicle scanned for error codes at autozone, its free. Post codes for more help....These engines have issues with the COPs (ignition coils-over-plugs) failing prior to 80k miles. When they fail typical problems are: Sputtering under load/acceleration, rough idle, random misfires, random stalling, light or heavy jerking under load (usually at 15-35mph and 45-65mph)..hopefully this helps!!

Apr 28, 2010 | 2003 Ford F150 Regular Cab

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