I was told I have a misfire in coil number four on my 2009 Honda Fit. Can any one tell me the order of the coils staring passenger side to driver side?

 

#1 is closest to the belt. #4 is furthest away from the belt.

 

i replaced that coil and the misfire kept happening. The problem is I can't get it to misfire just idleing in my drive way. I need to drive it for a bit then it will misfire ideling at stops.

 

Misfire is not "in a coil", the misfire originated in a cylinder. That's all the engine computer saw. That's all the misfire code is defined as.

A faulty coil is just one of several possible causes, though it is one of the most common causes.


Maybe it's not a coil issue.
Did you inspect the spark plug(s)? Is the plug loose?


Before replacing parts, you can swap parts to other cylinders to see if the miss code follows the moved parts, and which part.

If miss is on #4, swap coils between 4 and 3.
Swap spark plugs between 4 and 2
Then drive and see if miss moved to one of those other cylinders.

 

So the car started running uning funny it was getting near 120000k miles so I replaced the spark plugs(1 maintenance light told me to 2 first time they were replaced). The car started running better for a few weeks then it started with the running funny again I took it to mechanic they looked it over and told me I put the wrong spark plugs in and I have a misfire in cylinder #4 that was probably caused by the wrong spark plugs. They also told me that it could be the coil on #4 and if it started to act up bring it in and they will replace the coil. So I replaced the coil because that seamed like the next step. Now it doesn't put off a code (at least one that my code reader can pick up) or a check engine light (it's a Honda Fit thing) so I'm not sure it where to start after all this.

 

I replaced the #4 coil and the misfire continued so I put the old #4 back in and replaced the #1 with the new coil but haven't had a chance to test drive it yet (dang kids).

 

You have no check engine light and no fault code(s)?

Maybe the sensation you feel is not misfire?

Idle RPM just dips too low, it may need an 'idle relearn' done if memory was erased from the engine computer.

 

So I'll drive the car for about twenty minutes then when I stop, car will be idleing fine then it will feel like the engine drops out and the car kind of lunges and then it will return to idleing for a few seconds to a minute then do it again or it will even stop until the next stop. Some times after driving it for awhile you can feel it while you are driving.

 

Do you have the defroster on? That makes the AC system cycle on and off, you can feel the engine load change as the AC cycles.

 

It's doesn't mater if the ac system is on or not. And I know how that feels when it cycles and this is way more severe. if it's dark out I will see the head light dim when this "misfire" happens.

 

carbon deposits in egr valve?

 

how would one go about testing this out?

 

You would need to pull the EGR valve off and inspect the botttom of it as well as the port into the engine. Clean it with carb cleaner and a brush. You might need to buy a new gasket before you reinstall it… Should cost $5 for the gasket.

It is located on the passenger side, top of the engine. It looks like a small canister. On other cars that I have had they get gummed up around 100,000 miles.

EGR allows a small amount of gas to be recirculated into the intake while driving. If it's gummed up and stuck partially open it would give you a rough idle. It would be really noticeable after the car is been warmed up because it stays closed during the warm-up process and when the car is idling or at a low RPM. This is because you don't want exhaust gas recirculating into the intake during those times. Only during higher RPM driving post warm up. Hopefully this helps.