I would suspect a weak EGR valve. It should be toward the rear of the motor. Take a non or low flammable spray (WD40) and spray on or around the valve and on and around the seals and if the engine smoothes out that is where the problem is. A severe vaccum leak causes a lean condition which in turn causes the problem you have. Also spray around the hoses, gaskets, etc.
A lack of water in your cooling system will cause your 2002 Pontiac Sunfire to overheat. A malfunctioning thermostat can also cause it to overheat.
I think I'd check for a loose, cracked or missing vacuum hose somewhere under the hood. FriPilot
what causes a roaring sound in a 2004 pontiac sunfire after it warms up? it runs great and idles great and quiet except for this.Anonymously
There are a couple of things that can cause your Pontiac antilock brakes to lock up. The most common cause is a malfunctioning ABS sensor.
the thermostat stuck shut. will cause the car to over heat at ant temp!
There are a few reasons that would cause your 2002 Pontiac back speakers to only work sometimes. The most common cause is a loose or corroded ground wire.
A bad PCV valve or a problem in the PCV system will cause this
check if your battery is low than usual ..might be alternator problem
A 2001 Pontiac Sunfire 2.2 engine is a zero tolerance engine which will suffer catastrophic damage should the timing system fail. Because of the tight tolerances inside the engine, even being out of alignment a fraction of a second can cause the valves to slam into the pistons.
water in the fuel can cause an idling motor to sputter and/or die.
temperature gauge not working can be caused by a bad temp sensor in engine, a bad gauge in dash, or a bad fuse
i would go and contact the gm Pontiac dealer and they should be able to cring up and print you out a diagram free. cause asuna was made with Pontiac not chev so that's your best bet.
Your piston rings are probably bad. Which will cause compression loss, in effect you will loss power, and it will let oil trough and saturate your plugs.
Old age and vibration, I'd guess. All of mine were out too. The PONTIAC on the trunk lid wouldn't light up. I replaced the bulbs and now it does. For what it's worth, it's Way Cool when the PONTIAC does light up!
A bad fuel pump can cause stalling. The oil pressure will show low oil on the lights or gauges but if the pressure is ok then the switch should not cause stalling.
If the AC is on constantly, the fan will be on constantly. If that's not it, it mught be the fan relay or the temperature sensor.
The 1997 Pontiac Sun fire axle seal can leak because of age. A bad wheel bearing is the most common cause for an axle seal to leak.
a small but noticeable increase is to us a k&n air filter and u can turn off the a/c cause the a/c uses about 10 hp to run it
You might have bad piston rings, main cause of that because once you wear your rings out your gas is then able to seep past your piston rings into your oil and into your pan.
A clogged muffler can.
Yes, when idling and driving.
my 1990 300zx is idling rough what could cause this?
== == You may have a short in the wiring or something is wrong with the computer system in the car.
If a car shakes and loses power when idling it can be the spark plug. If a spark plug is fouling, it can cause power losses.