- This topic has 17 replies, 6 voices, and was last updated 12 years, 1 month ago by
.
-
Topic
-
-
Replies
-
p0300 is a random misfire and p0305 and p0306 are cylinders 5 and 6 misfiring, If this has the COP design I would swap the two coils to cylinders 1 and 2 and erase the codes then see if the misfire codes follows it.
We really need to know the make model and engine size.hey i have a 99 dodge ram 1500 and i had a random misfire code to, i had a problem with the catalyst converter and O2 sensors i fixed that and cleared the code and the truck runs like new
so check the catalyst converter and the O2 sensors
Welcome to the forums RacingManiac!
What vehicle are you working on?
What brand of replacement parts did you use, OEM or aftermarket?
A blinding CEL is a Class A Misfire.
If a cylinder is misfiring, there are many variables that can cause this. I would stress test the ignition system on the affected cylinders as well as performing a cylinder balance test.
That should give you a good starting point.
My car is a 2001 Honda Accord V6 EX. I used an BWG #EGR1433 replacement valve.
I’ve swapped the coils around and I still have the same issues. The TCS light still comes on and the Check Engine light blinks constantly. I’m about to check for leakage on the wires…
I’m also pretty certain that I have a bad heated O2 sensor…I’ve replaced the rear one by the cat before, but not the front one.
The EGR has nothing to do with the idle and those valves rarely have a problem. Since you just cleaned the EGR passages you might have either gotten the gasket on wrong or it’s damaged and causing a vacuum leak so you might want to go back and check that. It’s not likely that the coil packs are bad either but it’s worth doing a power balance test to see if you can nail down the effected cylinders, here is a video for you. Once you have done that and checked the gasket report back with your findings and we can take it from there. BTW make sure you use NGK or Nippoon Denso plugs in that engine, just about everything else I’ve seen causes problems.
Quoted From RacingManiac:
how do i do a power balance test? Never done that before.
Eric posted a youtube video link on how to do it.
If the issue followed the coil pack as you stated above, then i think we are all pretty confident that your coil pack may be at fault.
Although you did post earlier that you already swapped the coils around and there was no change…
My car is a 2001 Honda Accord V6 EX. I used an BWG #EGR1433 replacement valve.
I’ve swapped the coils around and I still have the same issues. The TCS light still comes on and the Check Engine light blinks constantly. I’m about to check for leakage on the wires…
I did the test and the cylinder on the rear driver side showed issues. So I swapped the coil pack for that cylinder and the problem followed the coil pack. I guess its bad….would you guys concur?
A link was posted with my post to the Power balance test video but it seems you may have found the problem but as dreamer2355 pointed out you had already stated that you swapped coils. I would replace that coil and see what you have then.
I replaced the problem coil and all of the misfire issues have now gone away. After cleaning the EGR ports and replacing the EGR valve, those issues are no longer an issue. I do have a couple of other issues that I will post.
Thanks a lot to everyone for you input and help.
im having a similar issue p0300 p0303 p0305 and ive swapped the coils and got p0300 p0303 p0305 and 1399 in return i have changed the plugs ngk iridium and changed one bad coil pack but not sure where to go now
- You must be logged in to reply to this topic.