mike070:
Hellonall. Good evening all. Pls I hav a small issue with my reliable Camry 2004 I4 engine. Whenever I remove my battery to help someone start his or her car when I reconnect mine i always have cylinder 4 misfire. Have swapped iginition coils and have the same problem on cylinder four meaning that cylinder 4,ignition coil is good. also changed spark plug but notice th same misfire. The last time it happened I had to travel with the car for a long distance and all of a sudden the car behaved like it was brand new. Since den it has been wow. Now I help someone with my battery and the problem has showed up.again. any suggestions guys. Thanks all.. Cc Gazzuzz et al.

mike070:
Hellonall. Good evening all. Pls I hav a small issue with my reliable Camry 2004 I4 engine. Whenever I remove my battery to help someone start his or her car when I reconnect mine i always have cylinder 4 misfire. Have swapped iginition coils and have the same problem on cylinder four meaning that cylinder 4,ignition coil is good. also changed spark plug but notice th same misfire. The last time it happened I had to travel with the car for a long distance and all of a sudden the car behaved like it was brand new. Since den it has been wow. Now I help someone with my battery and the problem has showed up.again. any suggestions guys. Thanks all.. Cc Gazzuzz et al.

honmusa:

There is no issue ,you are the cause of the issue ,battery is not meant to be removed , you are actually causing ECU to lose its memory if u are removing the battery .

GAZZUZZ:


do a cylinder drop test, find out if there is a spark on cylinder 4. Or with engine off, remove coil 4 attach a spark plug to it, and ground it, then start engine, you should see a consistent spark on spark plug.
If you don't find a spark, swap coil 4 with a different coil and try again.

What I think you have is a faulty coil pack.

OK sir. Will try and do it and revert. I swapped the coil packs before. From cylinder four to three and for the same misfire code for cylinder four. Will do the spark plug stuff and check if there is spark. Thanks and I will revert soon.


PS. Even used my neighbour coil pack. The same thing. Notice that when I disconnected the coil park when engine wqa running initially cylinder four did not make the car shudder. But later one it did while others made the car shudder until i connected them backbbthaks gazzuzz

mike070:



Thanks honmuaa. So does it mean it the battery is bad u won't replace it. Well the main sluglishness if from idle and den when u puy on the ac car drags. I for nor borrow person battery o. Chaiii. Thanks boss. Buy any possibility Og a faulty injector?? What signs will I notice if I have a faulty injector.

mayor2013:
To the best of my knowledge. If your ride is a drive by wire you car is undergoing a relearn process since you pulled out the battery in order to help someone.

Another problem we can look at there is your charging system. I hope your car battery is ok and your alternator is charging your car optimally. Have seen cases like this were a failing charging system triggers a misfire

mike070:



This relearn process is killing joor. Lol. I fink the charging system is ok cos the battery in dere is almost 2 years old. Will ask an auto elect to check it. Thanks boss.

Ps read somewhere that a dirty throttle can cause same and when I opened mine it was as clean as .........

honmusa:

Don't let any kazeem add any further salt to your injury, it not a issue ,it just a relearning process taking place ,every car does it but their recovery time differs.

GAZZUZZ:
The relearn process will only drop the idle speed to about 0.4-05 rpm at battery replacement. After driving around for 15-30mins idle would be set back to normal.

What your vehicle is going thru is not normal But if a long drive will fix it, by all means drive...

mike070:
Hellonall. Good evening all. Pls I hav a small issue with my reliable Camry 2004 I4 engine. Whenever I remove my battery to help someone start his or her car when I reconnect mine i always have cylinder 4 misfire. Have swapped iginition coils and have the same problem on cylinder four meaning that cylinder 4,ignition coil is good. also changed spark plug but notice th same misfire. The last time it happened I had to travel with the car for a long distance and all of a sudden the car behaved like it was brand new. Since den it has been wow. Now I help someone with my battery and the problem has showed up.again. any suggestions guys. Thanks all.. Cc Gazzuzz et al.

Denn:


Do a freeze from data screen grab of the moment you swap batteries and the moment the car starts driving without a misfire.

Compare the fuel trims and revert.

You have done coil and plug swap and the issue still remains on cylinder 4. This implies that the misfire is being caused from the fuel line and not the ignition line.

Remove injector 4, inspect and give it a good clean. Ensure the o rings are not damaged. Best to clean all injectors while at it.

Revert with good news.

Cheers

mayor2013:
Use an ultrasonic cleaning process to clean up your injectors. Not the kazeem style

mike070:




Where can I do that in Benin or asaba. Pls revert it u have any if not what r d cons doing it the 'KAZEEM STYLE'. thanks.

mike070:
Hellonall. Good evening all. Pls I hav a small issue with my reliable Camry 2004 I4 engine. Whenever I remove my battery to help someone start his or her car when I reconnect mine i always have cylinder 4 misfire. Have swapped iginition coils and have the same problem on cylinder four meaning that cylinder 4,ignition coil is good. also changed spark plug but notice th same misfire. The last time it happened I had to travel with the car for a long distance and all of a sudden the car behaved like it was brand new. Since den it has been wow. Now I help someone with my battery and the problem has showed up.again. any suggestions guys. Thanks all.. Cc Gazzuzz et al.

atims73:



My brother don't be afraid to help anyone who needs a bit of your battery juice, I drive a similar car and had same issues until I found out it wasn't a problem after all...I even had to teach my EXPERIENCED MECHANIC this procedure. The on-board computer has to relearn and there two ways of teaching it; the first which I don't fancy is driving the car at high speed for about an hour or two (you had earlier used this method unknowingly), the second, follow links below to watch the video. I am an electrical technician so I don't have problems handling most things myself. if you are not sure you can do it get your mechanic to watch the video and trust me you will be teaching something new. Note this problem and solution is only applicable to late 2002 to 2006 Toyota Camry. Enjoy!


https://www.youtube.com/watch?v=pnrAMZlkSSA

https://www.youtube.com/watch?v=pnrAMZlkSSA?t=99

amhardy46:
https://www.diyforums.net/i-developed-a-rough-idle-on-05-toyota-corolla-after-battery-...-531818.htm
Try this link best advice ever don't even think about going to one kazeem the machanic.