Question about Metra 95 96 Chevy Truck

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I have changed out fuel injectors wires plugs cap rotor ignition coil and i still have a code tripping saying multiple cylinder misfire

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  • winfield_luk Jan 03, 2011

    the truck has a 4.3 l v6

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  • Master
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Some of these 1500 series trucks had bad computer flashing, locate a used computer from the local scrap yard and try it. make sure it has the same engine and options on the truck. if not then change the control module, this is what gives the plugs and coils a spark signal.

Posted on Dec 30, 2010

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4 Answers

I have a 1996 chevy Corsica with a code PO300.I have tried many repairs and still cannot repair this code


code p0300 refers to random/multiple cylinder/s ---misfire detected=== causes spark plug/s--HT lead/s--injector/s---ignition coil/s--low compression --wiring
Seeing as you have covered all the electrics, now concentrate on the injectors and fuel pressures
If you will do all injectors and the fuel pressure is where it is supposed to be ( pressure test) then you will have covered all bases
Low compression will be in the one cylinder only ans will remain in that cylinder regardless of injector or plug changes
I would leave that to the last resort as if it is random, it may be a loose valve seat insert that moves randomly causing a compression problem

May 24, 2015 | 1996 Chevrolet Corsica

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

Random/multiple cylinder misfire


Since you have covered most of the ignition system, your other options would be the fuel system and compression - vac leaks.
One or more of the injectors could be dirty, the fuel pressure could be low, or you could have a vac leak or EGR problem.
Any other trouble codes in the computer ?

Feb 03, 2013 | 1997 Chevrolet Blazer

2 Answers

P305 code we have changed the spark plugs and wires we have replaced the fuel filter and had diagnostics done on the car and the mechanic says there is nothing wrong with the cyclinders


This is what all should be checked:
P0305 indicates the PCM has detected misfires on cylinder number five.
Here are six common problems that may cause OBD trouble code P0305:
  1. Fouled, cracked, worn or otherwise misfiring spark plug (Replaced)
  2. Bad ignition wire - burnt, cracked, carbon tracked wire or plug boot (Replaced)
  3. Defective ignition components - ignition module, ignition coil, distributor cap, etc..
  4. Vacuum leaks
  5. Clogged or otherwise defective fuel injector
  6. Internal mechanical engine fault, ie., low cylinder compression, bad valve, collapsed lifter, etc..
The aforementioned list covers the most common causes of P0305 in the order we feel is most likely to occur based on our past experiences. Certainly, each situation is different and there are other possible causes for cylinder misfires. Here are other causes we've seen (in no particular order).
  • Low fuel pressure
  • Leaking fuel pressure regulator
  • Poor fuel quality - water in gas tank
  • Uneven EGR flow caused by carbon build-up on engine with multiple EGR ports
  • loose or corroded fuel injector wiring
There seems to be a few things that have yet to be checked by your mechanic.
I know it is frustrating when the OBDII codes don't point you directly to the problem. To be hones this is something that I can not solve from here. However I hope that with the above information you can get your misfire detected code to go away after the real problem is discovered.

Kelly

Sep 26, 2011 | 1999 Toyota 4Runner

2 Answers

Engine cranks but wont start has an obd p 300 &p304 help me


P0300 Random/Multiple Cylinder Misfire Detected, the 304 is for cylinder number 4 any of these could be wrong 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

Jun 21, 2011 | 1996 Eagle Vision

2 Answers

Cylinder 5 and im also getting p0507 idle is higher then expected. ive change plugs wire cap button cam sensor and distributor. but now its throwing the codes p0300 and p0507 it goes from p0300 to p0305...


po 300 is random/ multible cylinder misfire detected po507 idle system rpm high-- go to this site for the po507 meaning--www.obd-codes.com/p507 === please go to this site for the po300 code---- www.obd-codes.com/p0300

Random/Multiple Cylinder Misfire Detected have a good day !!

Feb 15, 2011 | 1997 GMC Sierra

1 Answer

I have a po 300 engine code random cylinder misfire i change cap rotor and wires problem still exists


PO300 - Random/Multiple Cylinder Misfire Detected

When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft position (CKP) sensor (POS) signal to vary, Powertrain Control Module (PCM) or Electronic Control Module (ECM) can determine that a misfire is occurring.

Causes:
- Improper spark plug
- Insufficient compression
- Incorrect fuel pressure
- The injector circuit is open or shorted
- Fuel injectors may be faulty
- Intake air leak
- The ignition signal circuit is open or shorted

Solutions:
- Perform Injector Service
- Replace Spark Plugs
- Replace Injectors
- Replace Ignition Coils

Jan 27, 2011 | Chevrolet Silverado 1500 Cars & Trucks

4 Answers

2004 Acura MDX 3.5 130,000 miles multiple missfire how do i fix ?


Hi, multiple cylinder misfire, is when the engine cylinders do not fire in the correct order, and do not do it constantly. There is no particular pattern to it. My experience with this condition is that it is usually caused by a faulty ignition coil that is beginning to burn out. It could also be bad wires pluds rotor or cap

Causes Include.
  • 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 Solution:
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. 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.

Jan 11, 2011 | 2004 Acura MDX

2 Answers

What does code p0300 mean for a 2004 chevrolet cavalier-car is sputtering and stalling when idiling


P0300 - Random/Multiple Cylinder Misfire Detected

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

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:
- 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.

Keep us updated and remember to rate this answer.

Jan 01, 2011 | 2004 Chevrolet Cavalier

3 Answers

1997 ford f150 cyliner 7 misfire


sme problem had to have it put on computer and codes reset

Feb 05, 2009 | 1998 Ford F150 Regular Cab

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