Question about 1999 Pontiac Grand Prix

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Car backfired due to faulty spark plug wires or so i was told, replaced the wires and it ran fine for about a week and now is miss firing again

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Make sure you have the plug gapped right....

Posted on Aug 12, 2010

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Replace also the spark plugs and see what happen if still miss firing change the spark solenoids

Posted on Jul 28, 2010

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2 Answers

Backfiring and missing


change the spark plugs.

Jan 06, 2014 | Cars & Trucks

1 Answer

2006 Pontiac G6 shifting hard, engine very sluggish and mpg under 15.


You have a random engine misfire. P0300. That is the root cause. Basically this P0300 code means that the car's computer has detected that not all of the engine's cylinders are firing properly. This would also cause hard shifts due to low engine power.
Read on please.




A P0300 diagnostic code indicates a random or multiple misfire. If the last digit is a number other than zero, it corresponds to the cylinder number that is misfiring. A P0302 code, for example, would tell you cylinder number two is misfiring. Unfortunately, a P0300 doesn't tell you specifically which cylinder(s) is/are mis-firing, nor why.
Symptoms:
•the engine may be harder to start
•the engine may stumble / stumble, and/or hesitate
•other symptoms may also be present
Causes:
•Faulty spark plugs or wires
•Faulty coil (pack)
•Faulty oxygen sensor(s)
•Faulty fuel injector(s)
•Burned exhaust valve
•Faulty catalytic converter(s)
•Stuck/blocked/leaking EGR valve / passages
•Faulty camshaft position sensor
•Defective computer

Apr 24, 2017 | Cars & Trucks

1 Answer

2001 Kia Rio, motor start very well first time after drive around 2 miles motor no start no more


For spark plug problem,click the help links provided below :---Car has no spark?http://schematicsdiagram.blogspot.com/2011/06/car-has-no-spark.html
------------How to Replace Spark Plugs?http://schematicsdiagram.blogspot.com/2011/07/how-to-replace-spark-plugs.html
-------------Car cranks, has spark but will not start?

http://howtobyme.blogspot.com/2011/12/car-crankshas-spark-but-will-not-start.html

------------------------
The spark plug firing order for car?http://schematicsdiagram.blogspot.com/2011/06/spark-plug-firing-order-for-car.html
----------How to gap spark plug ?http://technoanswers.blogspot.in/2012/02/how-to-gap-spark-plug-on-chevy-impala.html-----------Spark plug Replacing for?http://technoanswers.blogspot.in/2012/02/spark-plug-replacing-for-chevy-impala.html
-----------How to identify number one spark plug on the distributor cap?http://schematicsdiagram.blogspot.com/2011/12/how-to-identify-number-one-spark-plug.html
---------How does the spark plug wire go on the distributor cap?http://schematicsdiagram.blogspot.com/2011/12/how-does-spark-plug-wires-go-on.html
---------Spark plug Firing Order Diagram?http://schematicsdiagram.blogspot.com/2011/12/2006-suzuki-forenza-spark-plug-firing.html
-----------

Car not starting or turning over indicates towards multiple possibilities. It can be issue with battery or weak battery. But if battery checks out ok, then it can be starter issue or faulty alternator or problem with low fuel pressure or no spark at spark plugs due to dirty spark plugs or faulty ignition coil or injectors getting cracked or dirty and needs to be cleaned.


To confirm the problem, the basic troubleshooting is required.


Click this link below and follow the troubleshooting:------

http://technoanswers.blogspot.in/2012/02/car-starting-issues.html

---------

This will help.

Thanks.

Feb 03, 2012 | 2001 Kia Rio

1 Answer

Hello there,when i starts z car in z morning,blue smoke comes out.Is that normal please.And z car miss fires if i accelerate suddenly.I have changed z distributor,spark plugs n wires.Z car is of carburator...


The blue smoke is OIL, coming from bad seals in the valves. It drains into the cylinders overnight and when you start the car it burns the oil off. This is probably fouling your plugs and if backfiring will fould the carburator. The miss firing is due to the age and most likely the timing of your engine, along with fouled plugs and carb.

Mar 08, 2011 | Honda Accord Cars & Trucks

2 Answers

Car had been running fine, backfired once and lost a little power momentarily. Parked 24 hours,started right up but backfired and died. Now starts easily but dies without intense pressure on gas pedal.


Sounds like it's fouled a spark plug this happens as the plug wires fail and the power goes to ground instead of firing the fuel. The timing belt could have skipped time but the engine may run smooly but have very little power.65158335.jpgThe plug wires will act like what you say too.340881376.jpgThe boots get electrcal holes in them and they fire to the head instead of the fuel mixture and then it fires sometimes and throws everything of and they run very badly or not at all.

Feb 24, 2011 | 1999 Ford Escort

1 Answer

93 Corvette bucks, misses, and backfires about 2.5K RPM


Has the Optispark distributor cap been replaced yet, if not have it replaced.

Nov 11, 2009 | 1993 Chevrolet Corvette

5 Answers

1996 Olds Aurora will not start.


It could be many things, heres a list of basics you could check.
  1. wore or lose drive belt
  2. bad alternator
  3. bad battery
  4. clogged fuel filter
  5. bad fuel pump
  6. clogged fuel injectors
  7. faulty spark plugs or spark plug wires
  8. check the timing
  9. faulty ignition coil
  10. clogged air filter
  11. battery terminal connections loose or corroded.

Mar 06, 2009 | 1996 Oldsmobile Aurora

1 Answer

98Eclipse 2.0 nonTurbo 5speed 180,000 miles ,code PO301


The po301 is a misfire code. The backfire can be caused by a excessive amount of fuel, bad valve timing etc.
My guess is you have damage to an exhaust valve that may have occurred when you had the timing belt problem.A compression test will indicate if you have a leaking exhaust valve.The reason for the backfire is the exhaust valve is still partially open when the spark plug fires.

Jan 03, 2009 | 1998 Mitsubishi Eclipse

1 Answer

1997 Ford Explorer AWD 5.0 v8


you might want to replae the map sensor and or the egr valve either of them can make it backfire

Aug 16, 2008 | 1998 Ford Explorer

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