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Just changed the crankshaft pulley and got the P0300 code on my 98 grand prix. Any help guys?

Did everything by the book. No code before. Also replaced the alternator.

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What does that mean? 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 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.

Posted on Oct 31, 2012

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SOURCE: Crankshaft Pulley..98 Subaru Forester

REMOVE OR DISCONNECT
Im Thinking you arw wanting info On the BUICK--If for the 98 Subaru Forester Same Concept and Procedures apply.


For 1995 Buick Park AVE. 3800 "Harmonic Ballancer" Pulley = Crankshaft Pulley. Requires A Flywheel LOCK tool, And A Harmonic Ballancer Pulley >PULLER and is Fairly Simple to Replace.

CAUTION: The balancer is serviced as an assembly. DO NOT attempt to separate pulley from balancer hub.
INSTALL OR CONNECT

  1. Crankshaft balancer.
    • Lubricate seal surface with engine oil.
  1. Balancer bolt.
    • Hold flywheel with J 37096 or equivalent.
    • Tighten balancer bolt to 150 Nm (110 lbs. ft.) +76°
Basicly use Pulley Mount BOLT to PUSH New Pulley Onto Crankshaft.
I Hope this Answers your Question and Good Luck

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  5. Inner fender splash shield (right side).
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Posted on May 31, 2009

csmock132
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SOURCE: 1997 Bonneville - can't remove crankshaft pulley

You need a three jaw puller to remove the balancer. After you remove the center bolt the puller hooks into the three holes in the balancer.

Posted on Jun 08, 2009

Molson02536
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SOURCE: radio locked on my 98 grand prix need unlock code

If your lucky the dealer may still have it or the code may be written down at the back pages of your manual. The other place where you can get the code would be www.radio-code.com. before you try any of that, try 0000 to unlock your radio. Good luck and hope this helps. 

Posted on Jun 19, 2009

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SOURCE: '98 grand prix GTP belt tensioner replacement

I didnt have to remove my alternator, I just used a 15 mm wrench to remove the left-hand threaded bolt holding the tensioner on. hope this helps

Posted on Jul 21, 2009

roniecon
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SOURCE: No fire to coil from coil on 96 model Jeep Grand Cherokee.

You need to put the harmonic balance for the 96 jeep on this motor,then put the crankshaft sensor on for the 96 jeep on the vehicle,this should fix you up.The crankshaft sensor and the harmonic balance have to go together.If I can be further help,let me know.>>roniecon@gmail.com

Posted on Aug 18, 2009

Testimonial: "Roniecon was extremely helpful trying to solve this problem, he hung in there to the very end. He spent a lot of time researching the problem. THANKS"

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