Question about 2000 Chevrolet Astro

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My200 astro is throwing the 0300 and the 0101 codes ....just replaced plugs wires cap and rotor ...still throwing the missfire random codes ...what now???

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  • beetlebooger Nov 20, 2009

    the 0300 code is saying a multiple random misfire and the 0101 cde says maf or vaf

  • beetlebooger Nov 20, 2009

    the 0300 code is saying a multiple random misfire and the 0101 cde says maf or vaf

  • beetlebooger Nov 20, 2009

    the 0300 code is saying a multiple random misfire and the 0101 cde says maf or vaf

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You need a scanner to identify the specific cylinder that is missfiring. What was the code desc. for the p0101?

Posted on Nov 20, 2009

  • Chris Colucci Nov 20, 2009

    Concentrate on MAF code first. Check inlet air ducts to ensure tight and no "air" leaks between MAF and engine. Check for vacuum leaks. Then, you must have a scan tool to diagnose MAF

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2000 chevy astro van 4.3 v6/I changed dist.cap 4 times in 1 year rotor too/runs rough,hesitation,bad ildeing,could it be dist.gear /shaft are worn/got code po300


code p 0300 is random/ multiple misfires
each p 0300 code ( 0301,2,3,4 etc) indicates the piston at fault
this code can be from electrical , ( cap plugs wires etc ) but is mostly attributed to problem injectors and ecm injector controls --wiring and connections
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I have a 1999 Chevy Astro that is giving me a P0300 trouble code. So far I've replaced the plugs, wires, cap, rotor, coil, fuel filter, air filter, and catalytic converter. I'm still having the...


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 stallsand 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.

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Engine lights comes on checked code and po300 comes up


that's a multiple cylinder missfire code(random). Has it been a bit shaky recently? if you haven't performed a tune up recently, it's time to do so. replace plugs, wires, and in some cases, the distributor cap and rotor if equipped.

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