Question about 2000 Honda Civic

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Misfire cylinder 3

2000 civic 4cyl, misfiring cylinder 3, plugs and wires good, is it possible to have a burnt exhaust valve and what would be the best way to find out? the engine light was on and before i could fix it it began flashing, meaning something more major had occured. i pulled the valve cover and assume i will have to pull the head-any tips advice are welcome!!

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Put the valve cover back on. Get a compression tester and with all spark plugs removed test the compression on all cylinders. They shoudl be aproximately 10percent of each other value. If one or more are low put an once of oil into the cylinder and see it the compression rises quite a bit. If it doesn not then you know it is a valve. If you have two next to each other,with low readings then you have a head gasked or head problem. Good luck. 

Posted on Jan 04, 2009

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Hello, I have a Honda Civic of year 1999. A trouble code 74 has been diagnosed. It is a misfire on the 4th cylinder. Can you please tell me how to fix same.


the misfire on a particular cylinder can be from several reasons
1--- mechanical--burnt valves , loose valve seat insert , hydraulic tappet holding valve open===run a compression test to eliminate mechanical faults
2-- electronic
faulty injector, faulty injector tip( blocked) faulty injector wiring, plug, ht lead --ecm
cracked insulation in distributor cap or coil housing
moving a faulty injector to another position will move the miss or simply replace it with a known good unit

May 09, 2016 | Honda Cars & Trucks

1 Answer

1993 nissan pickup 12 valve running of 3 cyliners. Removed spark plug wires and found that one cylinder was dead, then removed the spark plug wire from this cylinder, grounded it and had spark.


Can you do a compression test?

There may be something amiss with the piston or valve.. and it's usually the exhaust valve that has burnt/split, allowing compression to be kicked straight out of the exhaust. The symptom of a burnt/split exhaust valve is akin to a misfiring spark plug

Apr 23, 2016 | 1993 Nissan Pickup

2 Answers

Multiple misfires random misfires


Do a Cylinder Leak Down Test --to see if the valve are shot & leaking

You can also do an electronic cylinder contribution test

Then if the all seal, check the timing belt

After that check for vacuum leaks with evap smoke machine

Mar 28, 2014 | 2000 Honda Civic

1 Answer

P1300


Error Code: P0301
Description:
Cylinder 1 - Misfire Detected
Possible Cause:
Wiring.
Ignition system.
Fuel injectors.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression.
Base engine problems.
Engine control module (ECM).

Error Code: P0302
Description:
Cylinder 2 - Misfire Detected
Possible Cause:
Wiring.
Ignition system.
Fuel injectors.
Fuel pressure.
Running out of fuel.
EVAP canister purge valve.
Evaporative emission system.
Low compression.
Base engine problems.
Engine control module (ECM).

Error Code: P1300
Description: Random Misfire

Possible Cause:
As above.

Jan 22, 2014 | 1996 Honda Civic

3 Answers

I have a 1998 D1500 318 V-8 3.2L . The computer keeps tripping the check engine light and coding cylinder 4 misfire--yet the plug is good and the distributor cap is not purnt...computer problem??


Hi, there are 2 common reasons for a single cylinder misfire you have not addressed it: faulty fuel injector and burnt valve.
You need a voltmeter to test the injector:
Check the resistance across the injector terminals. It should be about 12 ohms. If open or shorted, replace the injector.
After removing an injector, apply 12 volts DC across the terminals. A "click" should be heard. If not, replace the injector.
If ok, then you need to do an engine compression leakdown test with cylinder compression gauge. if compression leaks down in that cylinder, then you have a burnt valve causing the misfire

Jul 24, 2011 | 1998 Dodge Ram 1500 4WD

1 Answer

Cylinder misfires detected on all 4 cylinders. repair cost?


This code means that the fuel in that cylinder is not being burned consistently. The most likely cause is a defective spark plug or plug wire. So the simplest approach would be to replace the spark plugs in all the cylinders (since the plugs all usually wear at a similar rate; and the other plugs may also be on the verge of failing). If replacing the plugs cures the misfire; the cost should be the price of a set of plugs; plus the labor to install them. This should cost between $30 and $100, depending on the type of engine you have, how many cylinders it has, and how much the spark plugs cost. You can get a general idea of the charge by phoning a few shops in your area, telling them the make, year, and model of your car, as well as how many cylinders it has (if you know), and asking the cost of spark plug replacement.

A code P0300 (Multiple Misfire Code) 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 helps.

Mar 08, 2011 | 2004 Honda Civic

1 Answer

My 2005 Chevy Equinox LT has a number 1 cylinder misfire. I already had the spark plugs and wires changed. I also had the coil changed and it still misfires. I checked it with my OB2 computer, and it reads...


Have you done a compression check? I had the same problem on an S-10 Chevy pick up. Found that # 3 cylinder had low compression due to a burnt exhaust valve. No more problems after having valve job done on the engine.

Feb 16, 2011 | 2005 Chevrolet Equinox

2 Answers

My 2003 Pontiac Bonneville has a fault code of p0300 random cylindar misfire. How would you go about fixing it?


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 helps (remember to rate this).

Oct 11, 2010 | Pontiac Bonneville Cars & Trucks

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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