Is it safe to drive with 2 cylinders misfiring? - Kia Forum

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post #1 of 11 (permalink) Old 07-25-2015, 08:37 AM Thread Starter
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Is it safe to drive with 2 cylinders misfiring?

I can't afford to get a new coil pack and plugs and wires for about two to three months and need to get my regular shopping for food and household items. Thanks in advance

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post #2 of 11 (permalink) Old 07-25-2015, 08:46 AM
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Borrow some cash, that is if you want to be able to drive your Rio in 2 or 3 months. It going to get worse.........
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post #3 of 11 (permalink) Old 07-25-2015, 09:49 AM Thread Starter
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I guess I will need to leave the car parked until I can get the parts and afford the labor costs.
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post #4 of 11 (permalink) Old 07-25-2015, 09:52 AM
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Originally Posted by derekagraham View Post
I guess I will need to leave the car parked until I can get the parts and afford the labor costs.
Have a friend help you do it and save some cash. If you lived closer I do it for you. Nothing much at all to replace 4 spark plugs and a coil. Easy repair ask a friend who knows something about cars or a friends dad.....
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post #5 of 11 (permalink) Old 07-25-2015, 10:17 AM Thread Starter
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My problem is my only friend who knows how to do it has no tools and I haven't seen him in awhile. Plus I can only put 75 a month towards the parts
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post #6 of 11 (permalink) Old 07-25-2015, 11:18 AM
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My problem is my only friend who knows how to do it has no tools and I haven't seen him in awhile. Plus I can only put 75 a month towards the parts
Ask some coworkers........
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post #7 of 11 (permalink) Old 07-25-2015, 02:35 PM Thread Starter
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Coworkers lol I am disabled. Fortunately I stopped by O'Reilly Auto parts and after we removed the cover we found the wires for cylinder 1 and 3 were not even plugged in. Stupid repair shop... After plugging in the wires we reset the codes and then after driving about 25 miles only code showing up p1166
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post #8 of 11 (permalink) Old 07-29-2015, 08:15 AM
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Here's the diagnostic info for P1166.


P1166
HO2S Controller Adaptation Diagnosis Malfunction
• P1166 is case for HO2S (Bank1, Sensor 1) Signal line open
• Fuel System (Fuel Tank/Pressure Regulator/Fuel Pump/PSV) Failure
• Poor Connection to Fuel Line Hose/ Sealing/Cut
• Sealing Between Purge Valve and Fuel Tank
• Air Leakage in Exhaust System
• Ignition System (Ignition Coil, Spark Plug, Cable) Failure
• Surge Tank and Intake Port Failure


I know that's vague but it might help you?

First thing I would try if you can't find anything obviously disconnected or broken is resetting the computer. Pull the negative battery cable off for a few minutes and see if the code returns after you hook it back up.

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post #9 of 11 (permalink) Old 07-29-2015, 08:56 AM
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How many miles on the spark plugs? They need to be replaced with ANYTHING over 25,000 miles on them.
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post #10 of 11 (permalink) Old 07-30-2015, 12:19 PM
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I see that ignition system failure is one of the possible issues associated with that code. You may have partially fried a coil by driving for a while with two plugs not being able to fire, a fried of mine did that with his S10 truck.

Did O'Reilly's read that P1166 code for you? Did they erase it? If they did then erasing the code already reset the computer for you. If the code comes back you still have some kind of issue going on.

If it's a decent store then a parts store like Autozone/O'Reillys should be able to test your coil for you, but you need to be able to take it off and bring it inside. (definitely check that they can test it before you bother removing it). A lot of stores have the testing machine but either don't have it set up for use, or the staff have no idea how to use it.

My advice is to invest in a very cheap set of tools, Harbor Freight or even Pep Boys will often have cheap socket sets for under $10, there's a lot of this stuff that you can do yourself very easily and it will save you a boat load of cash if you're on a fixed income. Labor is where shops nail you.
My other advice is to look around online for parts, for example Autozone wants $55 for an ignition coil yet RockAuto.com will sell you one for $35 shipping included.

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Last edited by PowerWagon; 07-30-2015 at 12:32 PM.
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