Question about 1997 Chevrolet Malibu

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What does it mean when your car is backfiring from the intake and what to look for. The fue pressure good spark plugs and coils r good any relieve on what's wrong with it

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  • Chevrolet Master
  • 1,250 Answers

Cylinder compression test. timing chain. open valve cover to see broken spring, valve not moving while cranking

Posted on Aug 06, 2013

  • Denis Houle
    Denis Houle Aug 07, 2013

    camshaft lobe wear

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6ya6ya
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Posted on Jan 02, 2017

Mike258
  • 1498 Answers

SOURCE: how to troubleshoot 1993 chevy Z71 pcm

Hi Nsilguero,

I apologize for the delay in responding.

From your description, I'm leaning toward a timing chain problem, first stretching, then skipping and finally breaking.

If you're getting voltage to the coil and still getting no spark, there is a test I'd like you to try.

Take off the distributor cap and have someone turn the engine over while you eyeball the rotor. Is it spinning?

This going to take some back and forth interaction. Comment me back with the results. We will proceed from there.

Mike

Posted on Jan 17, 2009

  • 217 Answers

SOURCE: 1998 Cavalier No Spark in cylinders 1 & 4

ignition mod. grounds,pcm or timing belt could all be it but, I would have to look at timing first.

Posted on Jan 17, 2009

ZJLimited
  • 17970 Answers

SOURCE: po300 code possible fixes?

HI there:

Basically this means that the the car's computer has detected that not all of the engine's cylinders are firing properly.


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 may include:

the engine may be harder to start
the engine may stumble / stumble, and/or hesitate
other symptoms may also be present

A code P0300 may mean that one or more of the following has happened:
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 EGR valve / passages
Faulty camshaft position sensor
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.


Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Posted on Aug 03, 2012

Testimonial: "thank you for your suggestions.codes were cleared,so far po140 has not returned (bank one,sensor two).code po300 returned in less than five minutes.will check vacuum,hoses,and egr next."

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What could cause a loud snapping noise in the area of the air intake


Your car is backfiring into the intake. Will make sound your describing.

Jan 02, 2016 | 2004 Jeep Liberty

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My 01 outback is loosing power and backfires


If check engine light is flashing its plugs or coils maybe injector, but fuel pressure is very important, it will idle ok but not drive good. Other possibility is cat clogged

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I have a 98 S10 pickup 2.2L. Engine has a bad misfire and no check engine light.


Improper spark plug gap
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Feb 04, 2013 | 1998 Chevrolet S-10 Pickup

2 Answers

Po300 code possible fixes?


HI there:

Basically this means that the the car's computer has detected that not all of the engine's cylinders are firing properly.


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 may include:

the engine may be harder to start
the engine may stumble / stumble, and/or hesitate
other symptoms may also be present

A code P0300 may mean that one or more of the following has happened:
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 EGR valve / passages
Faulty camshaft position sensor
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.


Random misfires that jump around from one cylinder to another (read: P030x codes) also will set a P0300 code. The underlying cause is often a lean fuel condition, which may be due to a vacuum leak in the intake manifold or unmetered air getting past the airflow sensor, or an EGR valve that is stuck open.


Hope this helps; also keep in mind that your feedback is important and I`ll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using FixYa, have a nice day.

Aug 03, 2012 | 2000 Chevrolet Silverado

1 Answer

What causes the 2002 nissan se r to backfire


Sounds like an ignition or timing problem.
Is the check engine light on ?
This engine uses a direct ignition system which means each cylinder has a coil on top of the spark plug. It could be as simple as worn out spark plugs.
If you had said the engine backfired and was hard to start, but no flooding, I would also look at low fuel pressure. But too much fuel causes flooding.
A faulty throttle position sensor could cause all of your symptoms, but it should set a trouble code and turn on the check engine light.

Jul 06, 2012 | 2002 Nissan Sentra

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1993 chevy corsica backfires


I think you have a valve problem. Need to remove valve covers and look for loose or broken rocker arms. If an exhaust valve does not open because the rocker is broken the trapped combustion gasses will revert through the intake when the intake valve opens. This can interupt the intake flow to other cylinders and prevent starting.

Nov 27, 2011 | 1993 Chevrolet Corsica

1 Answer

Have a miss firer, pops back in the intake. changed spark plugs the coils cam sensor intake gaskets no fix


backfiring through the intake is usually a sign of a lean condition i would check the fuel pressure.

Apr 27, 2011 | 2005 Ford Escape

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Its a 1998 528i bmw that will start but wont stay running also there is a loud kind of backfire noise from one of the cylinders . the engine wont rev up proper even though i keep pressing the throttle...


The fact that you have a backfire noise that you can trace to just one cylinder makes it sound like a spark plug could be loose or broken. Pull out your spark plugs and examine them. On a '98, that eill mean pulling off the plastic cover, then removing the coils (need a 10mm socket, be careful with the ground wires) and then reach down in with a small spark plug socket on a long extension.
Also, look for a massive air leak on the intake. Take apart the air tubes from the air filter up to the throttle body looking for air leaks. You could also have a leak at the intake manifold gasket but you may need help to check for that.

Mar 25, 2011 | 2008 BMW 528i Sedan

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Stalls and backfires 1997 jeep grand cherokee limited replaced the map sensor, coil rotor. distributer, spark plugs, spark plugs wires. throttle body pressure sensor ,ingnition coil IAT sensor. amd still...


you need to check the fuel pressure,and did you mean you replaced the distributor or just the rotor because inside the distributor is a pickup plate that some times causes this also 02 sensor can cause this.is your check engine light on if so go to chain auto parts store they usually read your codes for free.

Nov 26, 2010 | 1997 Jeep Grand Cherokee

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