CEL help.
#1
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CEL help.
So on my drive to work my cel flashed maybe 5 or 6 times then stayed on. I couldn't feel anything different with the car as in response, or any weird noises. I pulled the codes and it's P1399 and P0304 which is a misfire on cylinder 4. After doing some research and having my friends dad take a look at it, he said first thing he would do is a new coil for cylinder 4, what do you guys think? I'm pretty much a noob when it has anything to do with the engine, I really only know how to change the oil, trans, and diff. Any suggestions would be helpful from anyone. Thanks.
#4
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Join Date: Mar 2009
Location: Eugene, oregon
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Yes change them to start. Also you could have gotten bad fuel. That can cause it. I have had a miss fire on 2 cyl. At one time, cleared it then it and it was fine. The sensors are seem to be very quick to respond. Try running Lucas fuel treatment/ injector cleaner through it.
#5
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and *if* the code comes back, swap the coil to another cylinder and see if it changes what bank the code is on.If it does, THEN you need a new coil.
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#8
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Ok guys thank you, today I will put some fuel treatment and new gas in, then clear the code. If it comes back I will swap the coil with another one. Also before I touch the coil how does the order go? If I'm looking at the coils #1 would be the one closest to the front bumper and #4 would be the one closest to the dash, correct? I will report back after I do fuel treatment and new gas. Thanks guys.
#9
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Ok guys thank you, today I will put some fuel treatment and new gas in, then clear the code. If it comes back I will swap the coil with another one. Also before I touch the coil how does the order go? If I'm looking at the coils #1 would be the one closest to the front bumper and #4 would be the one closest to the dash, correct? I will report back after I do fuel treatment and new gas. Thanks guys.
#10
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Yep you got it. Thats the firing order. So you'd wanna swap the coil closest to the firewall.. #4.. if you get to that point. Hopefully the gas treatment will help. I always have used chevron supreme cause I like the commercials with the talking cars of course. Oh and never get gas when you see a gas truck there filling the tanks of the gas station. I've heard thats bad.