Help.. Car is very poorly

[GrumpyTwig]

Should have just used as an excuse to put a megane engine in it imo, would the missus notice?

 

[Fernandez]

Should have just used as an excuse to put a megane engine in it imo, would the missus notice?

Lol, funny you say that, I did tell her earlier that if it needed any work doing I may aswell get my Cambelt done which is man code for cams.

 

[Fernandez]

So the saga continues.

I replaced all the plugs and pencil coils but still no joy. Using a code reader its throwing out a P0300 which is:

Random/Multiple Cylinder Misfire Detected

What does this mean?
OBD Code P0300 refers to* 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
Possible symptoms of OBD code P0300 the engine may be harder to start the engine may stumble / stumble, and/or hesitate other symptoms may also be present

Causes/Possible causes of OBD code P0300 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.

One mate thinks its a piston, I'm getting another viewpoint tomorrow...

 

[Foxspeed]

that p0300 code is really a "not sure what it is but theres a problem"

just a process of illimination - either electrical or mechanical

a quick compression check will see if its a piston or valve for that matter

can you get it to run at a fast idle? if so disconnect one of the coils in turn to see if it makes a difference - if on one of them it doesnt then thats the faulty one...

 

[lgonzalez]

that p0300 code is really a "not sure what it is but theres a problem"

just a process of illimination - either electrical or mechanical

a quick compression check will see if its a piston or valve for that matter

can you get it to run at a fast idle? if so disconnect one of the coils in turn to see if it makes a difference - if on one of them it doesnt then thats the faulty one...

Damn beat me to it lol ....but yes what he said ;-)

 

[Fernandez]

that p0300 code is really a "not sure what it is but theres a problem"

just a process of illimination - either electrical or mechanical

a quick compression check will see if its a piston or valve for that matter

can you get it to run at a fast idle? if so disconnect one of the coils in turn to see if it makes a difference - if on one of them it doesnt then thats the faulty one...

Damn beat me to it lol ....but yes what he said ;-)

Cheers lads, I got someone coming round tomorrow who knows their onions. Depending on diagnosis depends where I send the car and what happens to it.

 

[ECG1000]

The same thing happened to me in my old Honda. It suddenly lost power and sounded like an Impreza. Turned out one off the leads had popped off the distributor so took about 2 seconds to fix.

Hope it's that simple for you mate

 

[gogsie]

Did you get this fixed as it sounds very much like a faulty injector. I had same thing on my old 172.

 

[Fernandez]

Did you get this fixed as it sounds very much like a faulty injector. I had same thing on my old 172.

It dropped a valve through a piston so a Meg engine has been put in its place :thumbsup:

 

[nutnutwelshman]

Are you up for the 13th ie lunch is on you dear heart

 

[Fernandez]

Are you up for the 13th ie lunch is on you dear heart

I'm up for it if I have the car back Kev.

 

[Roy]

What stage we at now angel with the beasty ???