Ignition Coils Misfiring anyone?
 

Hey guys, I was just wondering if anybody else has had this problem. My "Service Engine Soon" light came on so I took it to the dealership. Turns out an ignition coil went bad. They replaced all six because the guy said if one fails the others will eventually follow. My car is still under factory warranty until next June. So they replace all six and two month later my light turns on again. I take it back to the dealership and they tell me one of the ignition coils is misfiring again. They're going to run some tests to see what's causing it. I called them today and they said they were going to replace a valve sprocket :/ Hopefully that works...if that fails, the guy at the dealership said they might order me a new engine. Anybody has had this problem or is just my Zoe? :/ Thanks for any input in advance.

Clovis Nissan told me to replace all six ignition coils... I asked a tech and he said that's stupid because my car wouldn't even run right. I went to Lithia Nissan down the street and they said it's not the coils but a leak in my exhaust. They said they fixed the leak but it still comes on. In the end it was my Stillen intakes. When it's cold the light will stay on for a few days and when the outside temp gets hot the light will go away. It's annoying but I'm just glad it's just the intakes. Do you have any aftermarket parts?

*** When the light is on my rev idol is at 1k... When the light is off it's at 500k. That's how they figured it's the cold air messing up the a/f ratio.

had the same issue... they had it in twice and replace all coil packs... i lost faith and tracked it down myself.

turns out one of the contacts was not making good contact with the coil plug.

you can test it when the car starts misfiring, pull right over and keep the motor running. open the hood, juggle each connector and see if the miss stops.

i was going to buy new connectors and replace them, but they dont sell em... the whole harness is ridiculously expensive.

to permanently fix for free, pull the connectors and take a small screw driver and pry the connectors closer to the top so they can make good contact with the blade inside the connector.

http://ryan.midnight.net/car/IMG_2630.jpg

You will see the metal tabs in the horizontal slots... just pry them out a little bit and plug them back in.

good luck.

.

heh... i <heart> dealer mechanics.

I would question that diagnosis also.

:iagree: I wonder if he knows what the cel code was. I don't think stillen intakes can throw off a/f that much to cause a cel. I bet something else is going on.

Hey guys, sorry I've been M.I.A. So let me give you guys an update. First of all, my 40th is stock. Since the initial misfiring of the one ignition coil, the dealer replaced all 6. 300 miles later my Service Engine Soon light turns on again. They tell me it was a am ignition coil again. This time they replaced a couple of camshaft sprockets. I get my car back and a week later the light turns on again. At this point the dealer calls Corporate nissan, they have them open up my engine. They tell me they want to replace the short block, so they do. I get my car a week later, and two days after my car had a hard start and sure enough the darn light turns on again. I called the dealership and they tell me most likely they will throw in a new engine. Btw this whole time my car is running just fine its just the darn service engine soon light and that hard start up at times. Do I have a lemon? I love my 40th, would hate to part ways.

Oh and I bought the car used with 14k on it and now it has 21k. New engine at 21k? I'd take it. The factory warranty ends this June

most likely p0300 based on the details. random cylinder misfire.

Your dealership sounds completely incompetent.

They seriously replaced a short block without basically any diagnostics and now a whole motor? God, can you imagine if it wasn't under warranty? I would have sued them for being incompetent! They have what is most likely an electrical issue and are replacing engine mechanical parts and you don't see a problem with this? Unless, they have some really sound logic behind why they think a new motor is going to solve the issue I don't see it doing you any good. I think the problem is much more on the track of what ryan0 posted and not the crap your dealership is feeding you.

Find out the actual code/codes post it and I will be more then willing to help you get on the right track.

I've tagged this thread because I'm having a very similar issue.
I recently bought an 09 touring sport coupe with 6mt and after having it about a month it started throwing a SES light. I took it in to my local dealer for Oil change and to check out the light. The rep said that it showed a misfire and they reset the light and told me they would contact Nissan Tech Support. Light has come back on twice since and I'm dropping it off at the dealer on Sat. They are supposed to keep it until they find out why this is happening. I'll let ya'll know what they say.
I only have 15000 miles on car now. 7k when I got it.

Can you actually feel the misfire continue?

Not on mine. never felt anything out of the ordinary.

Take the new engine, but next time the light comes on just go to another dealership. I wouldn't let them open up a brand new engine.

Hey guys, so they now tell me they don't think it's an engine problem anymore. Thanks for the new short block, only cost them 8k they say. They still can't figure out what's causing it to throw the light. It's only been doing it during cold starts and the engine shakes a bit. So now they want to connect the car to a CPU and drive my car around to see if anything is not normal? They sound incompetent to me. I haven't called corporate nissan because I have a lot of patience, but man...enough is enough. How the hell they won't know what's wrong with my car. They got like 4 Japanese techs looking at it. I'll try to find out what's the code it's throwing and post back here. Thanks for

Yah i have the same problem, i gotten a

P0300.Random/Multiple Cylinder Misfire Detected
P0174.System too Lean (Bank 2)
Dealership said it's due to engine oil consumption. it's at the shop right now getting a short block put in.

I got mine back from the shop yesterday and they could not find what's causing the p0300 code. They did contact Nissan support engineering who asked all the standard questions again. ( Gas type, driving habits etc.) They reset the 'learned' profiles and asked me to drive it and see if the light comes back. According to the service rep, he thinks it's flooding out the cylinders and causing a misfire. His opinion only. He asked if I was short hopping the car when it happened. I had to ask for an explanation. start engine to move short distance and cut off. Then start again to move short distance. I told him no.
I asked him if everything is controlled by the computer, how could it flood? No answer. They are still fishing and he told me we may have to wait till it gets worse so they can find it.

I think it all just comes down to the fact that the misfire code is to sensitive, all engines misfire when cold. Its just the nature of the beast, thats why the cars run rich when first started to keep that to a minimum. For whatever reason the ECU starts looking for the misfire code to early while the engine is still cold. In the software I use for GM trucks you can tell the ECM when to start looking for misfires, by pushing this out to almost operating temp you can get that pesky code out of the way.

Its more or less just an emissions code, I mean to many misfires would wreck havoc on your cats. But if it gets to that point you will most definitely be able to hear it misfire.

Had to take my car in because it kept throwing P0300 after my short block swap out. Ended up being a VVEL control shaft position sensor that was out of whack, per the tech.

Car feels better and the code hasn't come back (yet). We will see if it does.

Well my light came back on on 2/23/13 when I cranked it. 39 degrees and raining. Took it back to the shop 1st thing Monday morning and told them to keep it till they found something. They called me today to tell me that they had, per Nissan Engineer, cleaned all ground connections and added a ground strap. They have another strap ordered and when it arrives I'll take it back to them. I was told that if this did not stop the code from popping up about once a month he would have the engineer come to the dealership and perform more testing. He also told me that the engineer is trying to eliminate possible causes and does believe it is electrical.
My dealership and the people I'm working with have been great. I know intermittent troubles are the worse to find and do appreciate their persistence.

Corporate nissan sent in a specialist to take a look at my car. The specialist ordered to replace all fuel injectors and the ECM. They have it hooked up to a monitor and they are going to put 200 miles on it they said. I should be getting my car this Monday. I asked Corporate to buy my car back at this point and that is currently being reviewed. It takes 10 business days. I will know my next Friday.

Just got the dreaded P0300 code this morning. Guess it's a trip to the dealership this weekend. The only thing done the car are K&N drop-in's and a Borla CBE. This suck's I wanted to finally install my Gen 3's this weekend.

~Also notice that idle is sitting arount 1,000-1,200 rpm's when the engine is already warmed up.

So replacing all 6 fuel injectors and ECM didn't work because I got a check engine light on again yesterday. The good news is that Nissan sent me a letter saying they will comply with the Song-Berverly Consumer Warranty Act. I think I'll get a brand new Nismo now. I will miss my 40th.

Mitco..i tend to agree with you. Mine threw the p0300 code when i started her up in low teen temps. never idled high or low or did anything else out of ordinary. i erased the code and it hasnt come back since...been about a 1000 miles.

Since I last updated my saga I have put about 1000 miles on my Z and the light has come on twice. 1st time at 750 miles since last reset and then yesterday at 250 miles since last reset. At the 750 event I took it to the dealership and they added two more ground straps as recommended by the Nissan engineer and performed the steering lock recall work. Yesterday, the service adviser told me he would get back in touch with the engineer to see how to proceed.

My question to everyone is, How can I get copies of all service records for my vehicle since it was sold new?

I found out while talking with a salesman that my car has had two owners before me. The first put ~1500 miles on the car before it was traded and the second added ~6200 before it was traded. I'm wondering now if this vehicle has had this problem since new.
When I bought it I was show a carfax report that only showed normal service interval work. Now I'm concerned that some info may have been left out.

Go to a dealership and have then pull up the car's history by VIN. They can then print up anything run through NNA.

Thanks. When they call me to bring it back in, I'll ask them to do that for me.

Hey guys,

Just a quick update on my car...it's been 1k miles since I've gotten my car back and no problems. However, Nissan is still going to buy my car back and give me a VPP code that will give me $1500 below invoice on the 2013 PW Nismo. They are going to pay the rest of my loan and give me a check for 7k towards the Nismo. I'm gonna miss my 40th but man the PW Nismo looks sick.

Hi guys,

So I got this stupid P0300 misfire code also today. Turned it off and it hasn't come on since.

Do we know if this is a common/serious issue or not? My friend said it MIGHT be the spark plugs. Happened when its cold today like most of you. I'm about to put my car away for the season and by the time I bring it back out next year it'll be out of warranty. I might even be out of warranty now. I also have fun intakes/headers back. Any suggestions?

What year is your Z? Mine is an 2009 and tripped this code last winter. Car ran fine so i cleared the code and it hasnt come back since. I dont think Z's like the cold weather......

This is about the same thing I've determined. Mine threw the same code repeatedly last winter. Warm weather came and no code since. I expect to see it come back with cold air. What bites is the increase in idle speed and decrease in gas mileage while the light is on.

Mine is a 2010 40th... I hope it's nothing :confused:

Did anyone find out officially what this issue is though? I turned the cel off last week but after about 500km it came back on again. That being said, there was a drop in temp when they came on but cant be sure.

Wanted to know if anyone found out or if Nissa officially had an answer to this problem?

Thanks

No answers. Mine never came back after I reset everything and cleared the codes.

I just shut off the P0300 code with Uprev so now it never comes on.:tup:

Same issue, in cold weather with a cold start
Started as a p0305; cleared it then it came back as p0300 after about 2k miles

Downtown LA Nissan never figured out what was wrong with my car, not even the specialist that Corporate Nissan sent. They replaced ignition coils, short block and fuel injectors. They had my car for over a month total. If you guys keeps having this problem, just have Nissan buy it back. They bought my 40th back despite me buying it used but still under factory warranty and now I'm rolling in a 2013 Nismo :ughdance:

I don't have warranty left though =(

So there doesn't seem to be any fix to this? I just replaced my sprocket and a solinoid to fix p0011. p0300 was still going off, replaced all 6 coils and spark plugs and the code still comes up. Otherwise the car runs normal. If I get it tuned could I get rid of problem?

I never did find the problem causing the p0300 code when I had the 2009 Z. I have 16k on my 2012 Z and it hasn't popped any codes yet....fingers crossed.
Maybe Nissan changed something that fixed the issue between 2009 and the 2012 model ???