Question about 1999 Saturn SC
#2 misfires where is it?
The spark plug at the front of the engine where the timing belt cover is and crank pulley is number one, then 2 and so on.
Posted on Feb 07, 2009
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Posted on Jan 02, 2017
SOURCE: Random Misfire on 2 & 3
I had a problem with a chevy with random misffires on all cylinders. It was the computer. Fords have very few problems with there computers. Does the check engine come on? Maybe have it scanned.
Posted on Dec 12, 2008
SOURCE: misfire on the #2 spark plug
Firing order is 1-4-2-5-3-6 Cylinders are numbered as such: Standing in front of the car looking at the engine the cylinders farthest from you on the back side of the engine are from left to right, 1-2-3 and on the front side closest to you from left to right 4-5-6.
Posted on Sep 16, 2009
A misfire doesn't always have to be ignition... it's just the most common cause. Faulty or plugged injector, low compression. You need to check fuel pressure and test the fuel injector flow. Then check compression. If you don't have tools for these tests, take it to someone who does. Testing is much cheaper than throwing parts at the problem.
Posted on Feb 25, 2010
In modern cars so much can go wrong to indicate an issue and a computer in the car can get confused as to what is really occurring. In most cars a misfire indicates either an incorrect firing order, shorted wires, bad plugs, or bad coil. Since you have replaced the wires and plugs we can rule those out. Im also assuming after the second engine code you pulled #2 plug and made sure it wasnt fouled with oil, was gapped correctly, and reinserted. To produce a sufficient spark for combustion the alternator sends power to a "Coil" which is in reality a storage point that then sends an amplified electrical current down the spark plug wire to the cylinder to fire the plug. If the car is truly misfiring you will notice a rough idle, fluctuating RPM's, and lack of acceleration. If you are experiencing any of these I would look at replacing the coil. If you arent experiencing any of these I would have the code cleared again and complete one drive cycle 100 miles and then have codes read again. If you still get a Misfire error some other causes known to occur with Rio's are fuel filter issues, gas caps, and fuel injector issues. Although rare, these can cause issues with the cars fuel delivery and emissions which can confuse the sensor in the ECU. I would try injector cleaner, replace the fuel filter, and gas cap . If funds are an issue then based on symptoms I would start with injector cleaner first $3, Filter $12, Gas cap $12, Coil $48 to $200+
Posted on Jun 06, 2010
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