Auto Answers » Engine » Pontiac

Pontiac engine repair questions and answers

Post your Pontiac engine question or share what you know by answering questions

3178 Questions
Sort by:
  • David G Lennertz
    David G Lennertz - 2003 Pontiac Montana - Engine - 4/24/2015
    Low oil pressure warning light
    39,000 miles. Light comes on within quarter mile after cold start. After turning engine off for a few minutes, the light does not come back on after restarting. Only happened twice and about ten days apart.
     
    0 answer
  • gram
    gram - 2005 Pontiac Sunfire - Engine - 4/24/2015
    My car doesn't want to start occasionally. Started about two wks ago, It will start to turn over, but not quite.
    It is happening quite frequently now. Check engine light does not come on. Everything else works. If you unhook positive on battery and wait half hr it starts. Happens whether the engine is warm or cold.
     
    0 answer
  • travis
    travis - 1995 Pontiac Grand Am - Engine - 4/20/2015
    My vehicle only smokes after sitting idiling for ten minutes then when I give it gas a little bit of grey smoke comesout
    It has to middle again for a few in order for it to smoke again,the car sat for a long time,I just bought it and all the vacuum lines had to be replaced,it has to pass smoke test,I've driving it for600 miles put new air cleaner and oil brand new hoses,it doesn't ...
     
    0 answer
  • travis
    travis - 1995 Pontiac Grand Am - Engine - 4/20/2015
    Why does my car smoke after sitting for five minutes at idle
    It doesn't smoke any other time, and don't burn any oil has 160.000,it happens only when warmed up and the check engine light comes on and off every now and then but mostly off
     
    • Rowes Machine
      4/20/2015 Rowes Machine
      for an engine to smoke it doesn't require a lot of oil to be burned. if it is a bluish smoke it is oil caused by blow by, which is small amounts of oil passing the rings due to pressure build up in the crank case. replacing the PCV valve could cure it but a 2.3l with 160000 miles might need new rings.
      Rowes Machine
      4/20/2015 travis
      It only smoke a little when I give it gas then it stops,once it iddles some more then give it gas it does again barely any smoke comes out,I have to pass a smoke test,is it my oil separator,this vehicle sat for a long time I just bought it,replaced air cleaner oil and every vacuum line ,I've put 600 miles on it but it still barely smokes at those intervals,I have to pass DMV smoke test
  • mattintn87
    mattintn87 - 2001 Pontiac Sunfire - Engine - 4/19/2015
    Loose Marbles/Rattling near Alternator & Serpentine Belt
    Yesterday, I went to the store and everything was fine. When I came back out and started the car, it started making a rattling noise similar to dragging tin cans across pavement. It does this as soon as I start the engine and continues until I turn it off. It's ...
     
    • Jimm
      4/19/2015 Jimm
      Several possibilities; worn alternator bearing, worn idler pulley bearing,belt tensioner is worn / faulty.

      Check these on-line vendors for the replacement parts; www.autopartswarehouse.com, www.RockAuto.com, www.partsgeek.com, to list only a few. The belt drive idler pulley is around $8.00 for your vehicle.
  • scot woodall
    scot woodall - 2004 Pontiac Sunfire - Engine - 4/19/2015
    Misfire on #4 what can cause this
    changed out coilpack assembly comp on each cylinder is 150 engine shacks heavily ecotec engine
     
    • Jimm
      4/19/2015 Jimm
      P0304 = Misfire Cylinder #4
      For the misfires;
      It may mean that one or more of the following has happened:

      Faulty spark plug or wire
      Faulty coil (pack)
      Faulty oxygen sensor(s)
      Faulty fuel injector
      Burned exhaust valve
      Faulty catalytic converter(s)
      Running out of fuel
      Poor compression
      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.
  • knisalad
    knisalad - 2003 Pontiac Bonneville - Engine - 4/18/2015
    P300 p420 engine shaking/loud at idle and in gear
    I've had this problem for over a year now. sometimes car idle smoothly, others it chugs hard, almost stalls itself out/ battery fluctuates. When accelerating easy it runs normal. when accelerating heavy there is a loud chirping/ squeeking noise, then the engine ...
     
    • Jimm
      4/18/2015 Jimm
      P0300 = Random Cylinder Misfire

      For the misfires - It may mean that one or more of the following has happened:

      Faulty spark plug or wire
      Faulty coil (pack)
      Faulty oxygen sensor(s)
      Faulty fuel injector
      Burned exhaust valve
      Faulty catalytic converter(s)
      Running out of fuel
      Poor compression
      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.

      P0420 = Catalyst system efficiency below threshold (bank 1)

      A code P0420 may mean that one or more of the following has happened:

      Leaded fuel was used where unleaded was called for
      A damaged or failed oxygen sensor (HO2S)
      Downstream oxygen sensor (HO2S) wiring damaged or connected improperly
      The engine coolant temperature sensor is not working properly
      Damaged or leaking exhaust manifold / catalytic converter / muffler / exhaust pipe
      Retarded spark timing
      The oxygen sensors in front and behind the converter are reporting too similar of readings
      Leaking fuel injector or high fuel pressure
      Cylinder misfire
      Oil contamination
  • knisalad
    knisalad - 2003 Pontiac Bonneville - Engine - 4/18/2015
    P300 p420 engine shaking/loud at idle and in gear
    I've had this problem for over a year now. sometimes car idle smoothly, others it chugs hard, almost stalls itself out/ battery fluctuates. When accelerating easy it runs normal. when accelerating heavy there is a loud chirping/ squeeking noise, then the engine ...
     
    • Jimm
      4/18/2015 Jimm
      P0300 = Random Cylinder Misfire

      For the misfires - It may mean that one or more of the following has happened:

      Faulty spark plug or wire
      Faulty coil (pack)
      Faulty oxygen sensor(s)
      Faulty fuel injector
      Burned exhaust valve
      Faulty catalytic converter(s)
      Running out of fuel
      Poor compression
      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.

      P0420 = Catalyst system efficiency below threshold (bank 1)

      A code P0420 may mean that one or more of the following has happened:

      Leaded fuel was used where unleaded was called for
      A damaged or failed oxygen sensor (HO2S)
      Downstream oxygen sensor (HO2S) wiring damaged or connected improperly
      The engine coolant temperature sensor is not working properly
      Damaged or leaking exhaust manifold / catalytic converter / muffler / exhaust pipe
      Retarded spark timing
      The oxygen sensors in front and behind the converter are reporting too similar of readings
      Leaking fuel injector or high fuel pressure
      Cylinder misfire
      Oil contamination
  • Richard
    Richard - 2000 Pontiac Grand Prix - Engine - 4/17/2015
    We turn the key and the car attemps to start for about 3 seconds then completely shuts down. What is the cause?
    Mechanic changed the battery but that did not solve the problem. Also, there was no code given when hooked up to the computer. The car will turn over every time we turn the key but will shut down in about 3 seconds...
     
    0 answer
  • Angelo
    Angelo - 2005 Pontiac Grand Am - Engine - 4/15/2015
    2004 Ford F 150 XLT 5.4 Trenton having a hard time finding the MAF Center
    The motor is idling rough
     
    0 answer
  • Twheel
    Twheel - 1992 Pontiac Grand Prix - Engine - 4/14/2015
    Why does my car keep dying when put in gear or at a stop sign
    My car seems to idle rough and fast it dies every time I put it in reverse and every time it comes to a stop now Now it starts ,dies, and refuses to start I have already changed the fuel filter
     
    0 answer
  • raina1993
    raina1993 - 2003 Pontiac Grand Am - Engine - 4/12/2015
    Why does my car blow smoke after sitting at stoplight for more than a couple minutes?
    It has 228,000 miles i thought it could be o rings but not sure, it also has a really bad smell
     
    • Mike
      4/12/2015 Mike
      Sounds like your valve seals are bad
  • raina1993
    raina1993 - 2003 Pontiac Grand Am - Engine - 4/11/2015
    Why does my car blow smoke after sitting at stoplight for more than a couple minutes?
    It has 228,000 miles i thought it could be o rings but not sure, it also has a really bad smell
     
    0 answer
  • Buffa10
    Buffa10 - 2006 Pontiac G6 - Engine - 4/8/2015
    My pontiac g6 is making a loud clunking noise. It was fine for about 5 minutes of driving. I hit a few small potholes an
    It drives. I drove the car about 5 minutes back home at about 15 to 20mph. The harder I hit the gas the faster and louder the noise clings. I don't think it makes noises when i turn the steering wheel.
     
    0 answer
  • Eric
    Eric - 1999 Pontiac Montana - Engine - 4/4/2015
    Clicking noise when trying to start engine.
    Van had been running fine earlier in the day and up to that point. Suddenly the engine would give a clicking noise and the speedometer would shake in the dashboard. Jump or battery tender doesn't start the engine and same result. Replaced the starter with a new ...
     
    0 answer