Question about 2001 Chevrolet Silverado 1500

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Truck would not start, installed fuel pump truck starts and now has misfire, engine light comes on shows p0300, cylinders 5678 not firing chevy 1500 express van 2001

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  • Anonymous Mar 15, 2014

    is it easy to do a tune up on a 2001 chevy express 8 cylinder

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You may want to check your wires. I would also recommend to check for 6-12V w/ DIGITAL multimeter@ TPL and Idling sensor, right under intake manifold. If you have questions let me know I don't have the schematics for the connector w/me right know, but can e-mail them to you if you still have the problem. I had a similar problem as well.
memillo27@hotmail.com

Posted on Jun 19, 2009

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97 chevy 1500 sputters at idle in gear can feel it a little while driving no cat. past 2 years run bank1 lean code plugs clean HELP


If the engine is misfiring the check engine light would be on and blinking and the engine control module (PCM) would store a fault code or codes for the cylinders that are misfiring. A lean code will not cause a misfire unless the engine has a vacuum leak most often at the intake manifold gaskets. A misfire code looks like this:

P0300-P0306 for 6 cylinder and P0300-P0308 for a V8.
P0300 indicated a random engine misfire, this can be caused by all kinds of issues.

Feb 24, 2017 | Cars & Trucks

2 Answers

2005 Buick Las 4 door Code p0300


Not much.
Code 300 is for a random miss. The engine computer has detected more than one cylinder that is not producing power, but no one cylinder is constant.
Until you get a code like 301 or 303 its a guessing game. 301-306 would tell you which cylinder is being the problem.
The cause could be fuel or spark.

Aug 30, 2015 | Buick Cars & Trucks

1 Answer

P0300 code. Came up checked for spark troubles found nothing good spark good compression something is making the vehicle sound rough should I suspect a weak fuel pump anyone have a common fix


Borrowed from OBD Codes.com:
"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.

A
  • the engine may be harder to start
  • the engine may stumble / stumble, and/or hesitate
  • other symptoms may also be present
  • 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/leaking EGR valve / passages
    • Faulty camshaft position sensor
    • Defective computer"

  • StarI suggest you start simple.... replace the plugs and test the spark plug wires. Make sure all connections are tight.
    Star

    Apr 02, 2015 | Cars & Trucks

    1 Answer

    I have a 98 chevy lumina with 61k miles.what can I do about these codes, P0300. P1381


    P0300 is a random or multiple cylinder misfire, and P1381 is a misfire EBCM (Electronic Brake Control Module) or PCM (Powertrain Control Module) Since you mentioned replacing fuel components, it could be as simple as a fuel injector being clogged up causing a cylinder misfire. Have you checked your fuel injectors?

    Jan 21, 2015 | Cars & Trucks

    2 Answers

    Why the loss of power and po300 code?


    HARD TO SAY WITH OUT BEING THERE BUT THIS MIGHT HELP .
    Crankshaft sensor Was the trouble with my 99 Chevy truck after replacing many components like coil cap rotor wires and so on .
    http://www.obd-codes.com/p0102 Code P0300 Causes and Fixes Code p0300 is a code that is generated when your engine has a misfire that is not related to only one cylinder. Sometimes this code will be set in addition to other codes such as p0301 which means that there is a misfire on cylinder 1 (cylinder 1 is the number one cylinder when looking at the firing order. It is generally the forward most cylinder on the engine.). If these engine codes are present as well the you should diagnose those first as they are probably causing code p0300.
    This code will set your check engine light and needs to be fixed as soon as possible. If it is not then you will probably need to replace your catalytic converter as well as the problem that is causing your misfire.
    There are many causes for this obd code. Since it is a "random misfire" or "multiple misfire" this means that the misfire is on different cylinders and not just one all the time.
    Common Causes
    • Low Fuel Pressure
    • Vacuum Leak
    • EGR system malfunction
    • Internal Engine Problems (such as low compression)
    Less Common Causes
    • Faulty Coil
    • Faulty Spark Plugs and/or Wires
    • Camshaft or Crankshaft sensors
    • Ignition module
    • Computer

    Jun 12, 2014 | 1998 Chevrolet Tahoe

    1 Answer

    PO300 code. 3.4L 98 Chevy blazer. (random misfire). this happens at high speeds 16000 rpms and higher. after the engine is warm it is more noticeable and misses at idling speeds. if i take it higher than...


    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. it could be any of the following 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
    • also
    • 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.

    Jun 08, 2011 | Chevrolet Blazer Cars & Trucks

    2 Answers

    03 chevy express 6.0 misfire code po300, rough idle, sputters and stalls.


    P0300 Diagnostic Code - Random Misfire
    Technical description:--
    Random/Multiple Cylinder Misfire Detected:---
    Exactly what does this code means:--
    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:--
    the engine may be harder to start.the engine may stumble / stumble, and/or hesitate.
    other symptoms may also be present…There may be rough idle, sputters and stalls and jerks.
    Causes:--
    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 for this error problem:--
    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 vehicle, 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 un-metered air getting past the airflow sensor, or an EGR valve that is stuck open.
    Thanks. Keep updated for any more query. You can rate this solution and show your appreciation.

    Aug 10, 2010 | 2005 Chevrolet Express

    2 Answers

    I have a 2002 Chevy Suburban the check engine light flashes it shows a P0300 code..Sugish..No top end power..


    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 fuel2_bing.gif injector(s)
    • Burned exhaust valve
    • Faulty catalytic convertor(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.

    Please rate


    May 27, 2010 | Chevrolet Suburban 2500 Cars & Trucks

    1 Answer

    Engine light comes on - Code shows P0300 and then


    OBD II 300 Random/Multiple Cylinder Misfire Detected

    When the misfire monitor detects a misfire, it will trigger the check engine light with the specific cylinder number as the last digit in the P030X code. For instance cylinder 1 misfire is P0301, cylinder 2 is P0302 etc. In this case we have either multiple cylinders misfiring, or the computer simply can't determine the specific cylinder, and as such we are left with the P0300 in computer memory.

    Possible Causes:

    Fuel injectors, related wiring, sensors and computer issues
    Running out of gas, or poor fuel quality
    Evaporative emissions system (EVAP) concerns: fuel vapors leaking into engine
    Incorrect Fuel Pressure
    EGR system concerns: leaking EGR valve or restricted ports
    Base engine concerns: low compression, valve train problems and timing issues
    Ignition system concerns including, but not limited to:
    Faulty spark plugs
    Faulty coil or related wiring
    Ignition module or related wiring issues
    Ignition related sensor faults or wiring issues

    Apr 04, 2009 | 1996 Dodge Ram 1500 Club Cab

    1 Answer

    2005 pontiac bonneville won't start--fuel pump is sounding like it's working, battery is o.k. but no fire to the engine--hooked up a diagonistic machine borrowed from a friend and it shows no code. 30...


    if the check engine light is not coming on and there are no error codes,have you checked the fuel pressure? the fuel pump may sound like its working but if you don't have 30 to 40 psi at the schrader valve on the fuel rail, then it is the fuel pump that is bad. if you had an intermittent miss or one cylinder was not firing you would get an error code to show a random misfire or a specific cylinder misfire.

    Apr 02, 2009 | 2005 Pontiac Bonneville

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