Question about 1997 Pontiac Sunfire
I noticed a lot of oil around the plugs indicating a possible seal bad but what could cause the misfire and what should I do to fix it without throwing parts at it?
Possible valve guide seals are leaking motor oil. The motor oil on the spark plugs can cause a misfire and a loss of power.
Posted on Jun 17, 2014
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Posted on Jan 02, 2017
SOURCE: 2003 pontiac sunfire GT
When they say "bank," they're referring to cylinder banks 1 or 2. Bank 1 is the passenger's side and has cylinders 1-4 on it. Bank 2 is the driver's side and has cylinders 5-8 on it.
P0171/0174 indicates that the long term fuel trims have reached a maximum (should be somewhere around 30-35%). Fuel trims are how much fuel the PCM adds or subtracts. 0171/0174 indicates that the engine is running lean, meaning that outside air is getting past the mass air sensor. The O2 sensors see this excess air and the PCM responds by cranking up fuel trims to add more fuel for that more air.
Possible solutions include:
Posted on Jun 09, 2008
check the coils my 98 had a crack coil that drove me nuts. If thats the problem make sure you replace both ignition coils
Posted on Jun 18, 2008
The OBD II code for P0400 is Exhaust Gas Recirculation Flow Malfunction.
I'm sure the only thing you have left is you may have to replace the EGR valve or check for any leak from the vaccum lines going to to EGR valve.
Posted on Jun 01, 2009
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