Question about 1997 Pontiac Sunfire

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1997 PONTIAC SUNFIRE ENGINE CODE 0P300 . NEW CRANK SENSOR, CAM SENSOR, MODULE, PLUGS,COIL ASSEMBLY COVER, STILL 0P300 RUNS BAD #1 PLUG WET WET. #2 NORMAL. #3 LOOK RICH BUT NOT WET ALOT OF CARBON. #4 NORMAL . CATALYTIC COVERTER WAS PLUGED THAT IS FIX. 4 MONTHS AGO TIMING BELT, SOMEONE HELP // IS ACTUALLY A BUDDYS CAR HE HAS THROWN ALOT OF MONEY AT IT I HAVE LOOKED AT IT I THINK COIL PACK IS BAD .. BUT COULD FUEL PRESURE POSSIBLY BE AN ISSUE

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None fire on plug and the coil and the mdule ers good

Posted on Sep 02, 2009

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Check coil pack and check fireing order

Posted on Jul 02, 2009

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2 Answers

1997 Pontiac Sunfire 2.4 DOHC, 2 outside cylinders won't fire


One coil serves those two cylinders (no. 1 and 4), so try repllacing that coil.

Nov 10, 2012 | 1997 Pontiac Sunfire

2 Answers

1997 Pontiac Sunfire 2.2 OHV starts up runs good for approx 3 seconds then starts missing seems spark is fading can pull plug wire and hook up to spark arrest tool when you initially start engine have...


You should replace your Cap and rotor....Check for any vacuum leaks, When you replaced your plugs, were there any plugs contaminated with engine oil ? Some times manifold gasket goes bad...and causes vacuum leak...Hope this helps you alittle more ???

Jun 28, 2011 | 1997 Pontiac Sunfire

1 Answer

I have a 96 Pontiac sunfire GT with the 2.4 engine it has a super bad misfire I have replaced the map sensor, plugs, coil pack, fuel rails. what elsa could be causeing this promblem


i`m assuming this is a dohc motor.have you checked the ignition module and the connections at the module.its located on the cover where the electrical connector fastens to it.it could also be a jumped timing chain possibly by a bad chain tensioner or worn out chain.

May 22, 2011 | 1997 Pontiac Sunfire

1 Answer

Engine cranks but will not start. i have new fuel filter installed new plugs installed .i have fuel pressure at fuel rail ,i have spark at plugs and the injectors all read 11 to 14 ohms resistance per shop...


If you've got spark and fuel, it should fire up. Crank the engine for about 20 to 30 seconds then immediately pull one spark plug. if your getting fuel, it should be wet with gasoline. No wet,no gas. But then again, the code says rich mixture. Doesn't add up. Check all the connections at the mass airflow sensor and the crankshaft and camshaft sensors.

Dec 20, 2010 | 2003 Pontiac Sunfire

1 Answer

P134, p0141, po300, po130 and po135. 2005 Sunfire.


Given that most of the trouble codes are for the O2 sensor, I think I would change it. The multiple misfires could be because of improper fuel/air mixture caused by a bad sensor. Disconnect the negative(-) battery terminal then change the sensor. Disconnecting the negative(-) should reset the computer and allow the fuel/air mixture to return to default allowing the engine to start.
P0130 - O2 Sensor Circuit Malfunction (Bank 1 Sensor 1)
P0134 - O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)
P0135 - O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 1)
P0141 - O2 Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)
P0300 - Random/Multiple Cylinder Misfire Detected

Jun 16, 2010 | 2005 Pontiac Sunfire

2 Answers

Engine code states cylinder 2 misfire. Replaced


sounds like a bad injector, just connection at the injector, also check for leaks at intake, one more thing , do a compression test on that cylinder start there, good luck.

Oct 24, 2009 | 1997 Pontiac Sunfire

2 Answers

1997 pontiac sunfire 2.2litre appears number two and four cylinders are dead but all have spark. after running engine for a bit plugs on those dead cylinders are blackish but dry car runs some what better...


sounds as thou thoses 2 clyinders are running rich either from excesive fuel aka bad injectors or drivability issues bad map sensor leaking intake ? need to scan ecm readings check all the sensors ? are you sure coil pack not failing ?

Aug 31, 2009 | 1997 Pontiac Sunfire

1 Answer

Engine miss 98 sunfire with codeP031


Not sure where you got that code but it almost sounds like you burnt a valve. Start up the engine and remove the oil cap and see if there alot if internal blow by pressure. If there is lot's of air coming out of the filler hole your have ether 1 piston ring bad, 2 burn a hole in the valve or and bent valve stem. Good luck sorry i dont have any more information on how your car is running.

Mar 30, 2009 | 1998 Pontiac Sunfire

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